http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/thrift/RunParagraphsEvent.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/thrift/RunParagraphsEvent.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/thrift/RunParagraphsEvent.java
index 1387635..62ead29 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/thrift/RunParagraphsEvent.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/thrift/RunParagraphsEvent.java
@@ -1,66 +1,68 @@
 /**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
+ * Licensed to the Apache Software Foundation (ASF) under one or more 
contributor license
+ * agreements. See the NOTICE file distributed with this work for additional 
information regarding
+ * copyright ownership. The ASF licenses this file to you under the Apache 
License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the 
License. You may obtain a
+ * copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * <p>http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
+ * <p>Unless required by applicable law or agreed to in writing, software 
distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing 
permissions and
  * limitations under the License.
  */
 /**
  * Autogenerated by Thrift Compiler (0.9.2)
  *
- * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
- *  @generated
+ * <p>DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *
+ * @generated
  */
 package org.apache.zeppelin.interpreter.thrift;
 
+import java.util.ArrayList;
+import java.util.BitSet;
+import java.util.Collections;
+import java.util.EnumMap;
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import javax.annotation.Generated;
+import org.apache.thrift.protocol.TTupleProtocol;
 import org.apache.thrift.scheme.IScheme;
 import org.apache.thrift.scheme.SchemeFactory;
 import org.apache.thrift.scheme.StandardScheme;
-
 import org.apache.thrift.scheme.TupleScheme;
-import org.apache.thrift.protocol.TTupleProtocol;
-import org.apache.thrift.protocol.TProtocolException;
-import org.apache.thrift.EncodingUtils;
-import org.apache.thrift.TException;
-import org.apache.thrift.async.AsyncMethodCallback;
 import org.apache.thrift.server.AbstractNonblockingServer.*;
-import java.util.List;
-import java.util.ArrayList;
-import java.util.Map;
-import java.util.HashMap;
-import java.util.EnumMap;
-import java.util.Set;
-import java.util.HashSet;
-import java.util.EnumSet;
-import java.util.Collections;
-import java.util.BitSet;
-import java.nio.ByteBuffer;
-import java.util.Arrays;
-import javax.annotation.Generated;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 @SuppressWarnings({"cast", "rawtypes", "serial", "unchecked"})
 @Generated(value = "Autogenerated by Thrift Compiler (0.9.2)", date = 
"2018-8-9")
-public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphsEvent, RunParagraphsEvent._Fields>, 
java.io.Serializable, Cloneable, Comparable<RunParagraphsEvent> {
-  private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new 
org.apache.thrift.protocol.TStruct("RunParagraphsEvent");
-
-  private static final org.apache.thrift.protocol.TField NOTE_ID_FIELD_DESC = 
new org.apache.thrift.protocol.TField("noteId", 
org.apache.thrift.protocol.TType.STRING, (short)1);
-  private static final org.apache.thrift.protocol.TField 
PARAGRAPH_IDS_FIELD_DESC = new 
org.apache.thrift.protocol.TField("paragraphIds", 
org.apache.thrift.protocol.TType.LIST, (short)2);
-  private static final org.apache.thrift.protocol.TField 
PARAGRAPH_INDICES_FIELD_DESC = new 
org.apache.thrift.protocol.TField("paragraphIndices", 
org.apache.thrift.protocol.TType.LIST, (short)3);
-  private static final org.apache.thrift.protocol.TField 
CUR_PARAGRAPH_ID_FIELD_DESC = new 
org.apache.thrift.protocol.TField("curParagraphId", 
org.apache.thrift.protocol.TType.STRING, (short)4);
+public class RunParagraphsEvent
+    implements org.apache.thrift.TBase<RunParagraphsEvent, 
RunParagraphsEvent._Fields>,
+        java.io.Serializable,
+        Cloneable,
+        Comparable<RunParagraphsEvent> {
+  private static final org.apache.thrift.protocol.TStruct STRUCT_DESC =
+      new org.apache.thrift.protocol.TStruct("RunParagraphsEvent");
+
+  private static final org.apache.thrift.protocol.TField NOTE_ID_FIELD_DESC =
+      new org.apache.thrift.protocol.TField(
+          "noteId", org.apache.thrift.protocol.TType.STRING, (short) 1);
+  private static final org.apache.thrift.protocol.TField 
PARAGRAPH_IDS_FIELD_DESC =
+      new org.apache.thrift.protocol.TField(
+          "paragraphIds", org.apache.thrift.protocol.TType.LIST, (short) 2);
+  private static final org.apache.thrift.protocol.TField 
PARAGRAPH_INDICES_FIELD_DESC =
+      new org.apache.thrift.protocol.TField(
+          "paragraphIndices", org.apache.thrift.protocol.TType.LIST, (short) 
3);
+  private static final org.apache.thrift.protocol.TField 
CUR_PARAGRAPH_ID_FIELD_DESC =
+      new org.apache.thrift.protocol.TField(
+          "curParagraphId", org.apache.thrift.protocol.TType.STRING, (short) 
4);
+
+  private static final Map<Class<? extends IScheme>, SchemeFactory> schemes =
+      new HashMap<Class<? extends IScheme>, SchemeFactory>();
 
-  private static final Map<Class<? extends IScheme>, SchemeFactory> schemes = 
new HashMap<Class<? extends IScheme>, SchemeFactory>();
   static {
     schemes.put(StandardScheme.class, new 
RunParagraphsEventStandardSchemeFactory());
     schemes.put(TupleScheme.class, new RunParagraphsEventTupleSchemeFactory());
@@ -71,12 +73,15 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
   public List<Integer> paragraphIndices; // required
   public String curParagraphId; // required
 
-  /** The set of fields this struct contains, along with convenience methods 
for finding and manipulating them. */
+  /**
+   * The set of fields this struct contains, along with convenience methods 
for finding and
+   * manipulating them.
+   */
   public enum _Fields implements org.apache.thrift.TFieldIdEnum {
-    NOTE_ID((short)1, "noteId"),
-    PARAGRAPH_IDS((short)2, "paragraphIds"),
-    PARAGRAPH_INDICES((short)3, "paragraphIndices"),
-    CUR_PARAGRAPH_ID((short)4, "curParagraphId");
+    NOTE_ID((short) 1, "noteId"),
+    PARAGRAPH_IDS((short) 2, "paragraphIds"),
+    PARAGRAPH_INDICES((short) 3, "paragraphIndices"),
+    CUR_PARAGRAPH_ID((short) 4, "curParagraphId");
 
     private static final Map<String, _Fields> byName = new HashMap<String, 
_Fields>();
 
@@ -86,11 +91,9 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       }
     }
 
-    /**
-     * Find the _Fields constant that matches fieldId, or null if its not 
found.
-     */
+    /** Find the _Fields constant that matches fieldId, or null if its not 
found. */
     public static _Fields findByThriftId(int fieldId) {
-      switch(fieldId) {
+      switch (fieldId) {
         case 1: // NOTE_ID
           return NOTE_ID;
         case 2: // PARAGRAPH_IDS
@@ -104,19 +107,15 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       }
     }
 
-    /**
-     * Find the _Fields constant that matches fieldId, throwing an exception
-     * if it is not found.
-     */
+    /** Find the _Fields constant that matches fieldId, throwing an exception 
if it is not found. */
     public static _Fields findByThriftIdOrThrow(int fieldId) {
       _Fields fields = findByThriftId(fieldId);
-      if (fields == null) throw new IllegalArgumentException("Field " + 
fieldId + " doesn't exist!");
+      if (fields == null)
+        throw new IllegalArgumentException("Field " + fieldId + " doesn't 
exist!");
       return fields;
     }
 
-    /**
-     * Find the _Fields constant that matches name, or null if its not found.
-     */
+    /** Find the _Fields constant that matches name, or null if its not found. 
*/
     public static _Fields findByName(String name) {
       return byName.get(name);
     }
@@ -140,31 +139,54 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
 
   // isset id assignments
   public static final Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> 
metaDataMap;
+
   static {
-    Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new 
EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
-    tmpMap.put(_Fields.NOTE_ID, new 
org.apache.thrift.meta_data.FieldMetaData("noteId", 
org.apache.thrift.TFieldRequirementType.DEFAULT, 
-        new 
org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
-    tmpMap.put(_Fields.PARAGRAPH_IDS, new 
org.apache.thrift.meta_data.FieldMetaData("paragraphIds", 
org.apache.thrift.TFieldRequirementType.DEFAULT, 
-        new 
org.apache.thrift.meta_data.ListMetaData(org.apache.thrift.protocol.TType.LIST, 
-            new 
org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING))));
-    tmpMap.put(_Fields.PARAGRAPH_INDICES, new 
org.apache.thrift.meta_data.FieldMetaData("paragraphIndices", 
org.apache.thrift.TFieldRequirementType.DEFAULT, 
-        new 
org.apache.thrift.meta_data.ListMetaData(org.apache.thrift.protocol.TType.LIST, 
-            new 
org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.I32))));
-    tmpMap.put(_Fields.CUR_PARAGRAPH_ID, new 
org.apache.thrift.meta_data.FieldMetaData("curParagraphId", 
org.apache.thrift.TFieldRequirementType.DEFAULT, 
-        new 
org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
+    Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap =
+        new EnumMap<_Fields, 
org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
+    tmpMap.put(
+        _Fields.NOTE_ID,
+        new org.apache.thrift.meta_data.FieldMetaData(
+            "noteId",
+            org.apache.thrift.TFieldRequirementType.DEFAULT,
+            new org.apache.thrift.meta_data.FieldValueMetaData(
+                org.apache.thrift.protocol.TType.STRING)));
+    tmpMap.put(
+        _Fields.PARAGRAPH_IDS,
+        new org.apache.thrift.meta_data.FieldMetaData(
+            "paragraphIds",
+            org.apache.thrift.TFieldRequirementType.DEFAULT,
+            new org.apache.thrift.meta_data.ListMetaData(
+                org.apache.thrift.protocol.TType.LIST,
+                new org.apache.thrift.meta_data.FieldValueMetaData(
+                    org.apache.thrift.protocol.TType.STRING))));
+    tmpMap.put(
+        _Fields.PARAGRAPH_INDICES,
+        new org.apache.thrift.meta_data.FieldMetaData(
+            "paragraphIndices",
+            org.apache.thrift.TFieldRequirementType.DEFAULT,
+            new org.apache.thrift.meta_data.ListMetaData(
+                org.apache.thrift.protocol.TType.LIST,
+                new org.apache.thrift.meta_data.FieldValueMetaData(
+                    org.apache.thrift.protocol.TType.I32))));
+    tmpMap.put(
+        _Fields.CUR_PARAGRAPH_ID,
+        new org.apache.thrift.meta_data.FieldMetaData(
+            "curParagraphId",
+            org.apache.thrift.TFieldRequirementType.DEFAULT,
+            new org.apache.thrift.meta_data.FieldValueMetaData(
+                org.apache.thrift.protocol.TType.STRING)));
     metaDataMap = Collections.unmodifiableMap(tmpMap);
-    
org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(RunParagraphsEvent.class,
 metaDataMap);
+    org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(
+        RunParagraphsEvent.class, metaDataMap);
   }
 
-  public RunParagraphsEvent() {
-  }
+  public RunParagraphsEvent() {}
 
   public RunParagraphsEvent(
-    String noteId,
-    List<String> paragraphIds,
-    List<Integer> paragraphIndices,
-    String curParagraphId)
-  {
+      String noteId,
+      List<String> paragraphIds,
+      List<Integer> paragraphIndices,
+      String curParagraphId) {
     this();
     this.noteId = noteId;
     this.paragraphIds = paragraphIds;
@@ -172,9 +194,7 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
     this.curParagraphId = curParagraphId;
   }
 
-  /**
-   * Performs a deep copy on <i>other</i>.
-   */
+  /** Performs a deep copy on <i>other</i>. */
   public RunParagraphsEvent(RunParagraphsEvent other) {
     if (other.isSetNoteId()) {
       this.noteId = other.noteId;
@@ -295,7 +315,9 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
     this.paragraphIndices = null;
   }
 
-  /** Returns true if field paragraphIndices is set (has been assigned a 
value) and false otherwise */
+  /**
+   * Returns true if field paragraphIndices is set (has been assigned a value) 
and false otherwise
+   */
   public boolean isSetParagraphIndices() {
     return this.paragraphIndices != null;
   }
@@ -332,125 +354,115 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
 
   public void setFieldValue(_Fields field, Object value) {
     switch (field) {
-    case NOTE_ID:
-      if (value == null) {
-        unsetNoteId();
-      } else {
-        setNoteId((String)value);
-      }
-      break;
-
-    case PARAGRAPH_IDS:
-      if (value == null) {
-        unsetParagraphIds();
-      } else {
-        setParagraphIds((List<String>)value);
-      }
-      break;
+      case NOTE_ID:
+        if (value == null) {
+          unsetNoteId();
+        } else {
+          setNoteId((String) value);
+        }
+        break;
 
-    case PARAGRAPH_INDICES:
-      if (value == null) {
-        unsetParagraphIndices();
-      } else {
-        setParagraphIndices((List<Integer>)value);
-      }
-      break;
+      case PARAGRAPH_IDS:
+        if (value == null) {
+          unsetParagraphIds();
+        } else {
+          setParagraphIds((List<String>) value);
+        }
+        break;
 
-    case CUR_PARAGRAPH_ID:
-      if (value == null) {
-        unsetCurParagraphId();
-      } else {
-        setCurParagraphId((String)value);
-      }
-      break;
+      case PARAGRAPH_INDICES:
+        if (value == null) {
+          unsetParagraphIndices();
+        } else {
+          setParagraphIndices((List<Integer>) value);
+        }
+        break;
 
+      case CUR_PARAGRAPH_ID:
+        if (value == null) {
+          unsetCurParagraphId();
+        } else {
+          setCurParagraphId((String) value);
+        }
+        break;
     }
   }
 
   public Object getFieldValue(_Fields field) {
     switch (field) {
-    case NOTE_ID:
-      return getNoteId();
-
-    case PARAGRAPH_IDS:
-      return getParagraphIds();
+      case NOTE_ID:
+        return getNoteId();
 
-    case PARAGRAPH_INDICES:
-      return getParagraphIndices();
+      case PARAGRAPH_IDS:
+        return getParagraphIds();
 
-    case CUR_PARAGRAPH_ID:
-      return getCurParagraphId();
+      case PARAGRAPH_INDICES:
+        return getParagraphIndices();
 
+      case CUR_PARAGRAPH_ID:
+        return getCurParagraphId();
     }
     throw new IllegalStateException();
   }
 
-  /** Returns true if field corresponding to fieldID is set (has been assigned 
a value) and false otherwise */
+  /**
+   * Returns true if field corresponding to fieldID is set (has been assigned 
a value) and false
+   * otherwise
+   */
   public boolean isSet(_Fields field) {
     if (field == null) {
       throw new IllegalArgumentException();
     }
 
     switch (field) {
-    case NOTE_ID:
-      return isSetNoteId();
-    case PARAGRAPH_IDS:
-      return isSetParagraphIds();
-    case PARAGRAPH_INDICES:
-      return isSetParagraphIndices();
-    case CUR_PARAGRAPH_ID:
-      return isSetCurParagraphId();
+      case NOTE_ID:
+        return isSetNoteId();
+      case PARAGRAPH_IDS:
+        return isSetParagraphIds();
+      case PARAGRAPH_INDICES:
+        return isSetParagraphIndices();
+      case CUR_PARAGRAPH_ID:
+        return isSetCurParagraphId();
     }
     throw new IllegalStateException();
   }
 
   @Override
   public boolean equals(Object that) {
-    if (that == null)
-      return false;
-    if (that instanceof RunParagraphsEvent)
-      return this.equals((RunParagraphsEvent)that);
+    if (that == null) return false;
+    if (that instanceof RunParagraphsEvent) return 
this.equals((RunParagraphsEvent) that);
     return false;
   }
 
   public boolean equals(RunParagraphsEvent that) {
-    if (that == null)
-      return false;
+    if (that == null) return false;
 
     boolean this_present_noteId = true && this.isSetNoteId();
     boolean that_present_noteId = true && that.isSetNoteId();
     if (this_present_noteId || that_present_noteId) {
-      if (!(this_present_noteId && that_present_noteId))
-        return false;
-      if (!this.noteId.equals(that.noteId))
-        return false;
+      if (!(this_present_noteId && that_present_noteId)) return false;
+      if (!this.noteId.equals(that.noteId)) return false;
     }
 
     boolean this_present_paragraphIds = true && this.isSetParagraphIds();
     boolean that_present_paragraphIds = true && that.isSetParagraphIds();
     if (this_present_paragraphIds || that_present_paragraphIds) {
-      if (!(this_present_paragraphIds && that_present_paragraphIds))
-        return false;
-      if (!this.paragraphIds.equals(that.paragraphIds))
-        return false;
+      if (!(this_present_paragraphIds && that_present_paragraphIds)) return 
false;
+      if (!this.paragraphIds.equals(that.paragraphIds)) return false;
     }
 
     boolean this_present_paragraphIndices = true && 
this.isSetParagraphIndices();
     boolean that_present_paragraphIndices = true && 
that.isSetParagraphIndices();
     if (this_present_paragraphIndices || that_present_paragraphIndices) {
-      if (!(this_present_paragraphIndices && that_present_paragraphIndices))
-        return false;
-      if (!this.paragraphIndices.equals(that.paragraphIndices))
-        return false;
+      if (!(this_present_paragraphIndices && that_present_paragraphIndices)) 
return false;
+      if (!this.paragraphIndices.equals(that.paragraphIndices)) return false;
     }
 
     boolean this_present_curParagraphId = true && this.isSetCurParagraphId();
     boolean that_present_curParagraphId = true && that.isSetCurParagraphId();
     if (this_present_curParagraphId || that_present_curParagraphId) {
-      if (!(this_present_curParagraphId && that_present_curParagraphId))
-        return false;
-      if (!this.curParagraphId.equals(that.curParagraphId))
-        return false;
+      if (!(this_present_curParagraphId && that_present_curParagraphId)) 
return false;
+      if (!this.curParagraphId.equals(that.curParagraphId)) return false;
     }
 
     return true;
@@ -462,23 +474,19 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
 
     boolean present_noteId = true && (isSetNoteId());
     list.add(present_noteId);
-    if (present_noteId)
-      list.add(noteId);
+    if (present_noteId) list.add(noteId);
 
     boolean present_paragraphIds = true && (isSetParagraphIds());
     list.add(present_paragraphIds);
-    if (present_paragraphIds)
-      list.add(paragraphIds);
+    if (present_paragraphIds) list.add(paragraphIds);
 
     boolean present_paragraphIndices = true && (isSetParagraphIndices());
     list.add(present_paragraphIndices);
-    if (present_paragraphIndices)
-      list.add(paragraphIndices);
+    if (present_paragraphIndices) list.add(paragraphIndices);
 
     boolean present_curParagraphId = true && (isSetCurParagraphId());
     list.add(present_curParagraphId);
-    if (present_curParagraphId)
-      list.add(curParagraphId);
+    if (present_curParagraphId) list.add(curParagraphId);
 
     return list.hashCode();
   }
@@ -506,17 +514,20 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       return lastComparison;
     }
     if (isSetParagraphIds()) {
-      lastComparison = 
org.apache.thrift.TBaseHelper.compareTo(this.paragraphIds, other.paragraphIds);
+      lastComparison =
+          org.apache.thrift.TBaseHelper.compareTo(this.paragraphIds, 
other.paragraphIds);
       if (lastComparison != 0) {
         return lastComparison;
       }
     }
-    lastComparison = 
Boolean.valueOf(isSetParagraphIndices()).compareTo(other.isSetParagraphIndices());
+    lastComparison =
+        
Boolean.valueOf(isSetParagraphIndices()).compareTo(other.isSetParagraphIndices());
     if (lastComparison != 0) {
       return lastComparison;
     }
     if (isSetParagraphIndices()) {
-      lastComparison = 
org.apache.thrift.TBaseHelper.compareTo(this.paragraphIndices, 
other.paragraphIndices);
+      lastComparison =
+          org.apache.thrift.TBaseHelper.compareTo(this.paragraphIndices, 
other.paragraphIndices);
       if (lastComparison != 0) {
         return lastComparison;
       }
@@ -526,7 +537,8 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       return lastComparison;
     }
     if (isSetCurParagraphId()) {
-      lastComparison = 
org.apache.thrift.TBaseHelper.compareTo(this.curParagraphId, 
other.curParagraphId);
+      lastComparison =
+          org.apache.thrift.TBaseHelper.compareTo(this.curParagraphId, 
other.curParagraphId);
       if (lastComparison != 0) {
         return lastComparison;
       }
@@ -542,7 +554,8 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
     schemes.get(iprot.getScheme()).getScheme().read(iprot, this);
   }
 
-  public void write(org.apache.thrift.protocol.TProtocol oprot) throws 
org.apache.thrift.TException {
+  public void write(org.apache.thrift.protocol.TProtocol oprot)
+      throws org.apache.thrift.TException {
     schemes.get(oprot.getScheme()).getScheme().write(oprot, this);
   }
 
@@ -593,15 +606,20 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
 
   private void writeObject(java.io.ObjectOutputStream out) throws 
java.io.IOException {
     try {
-      write(new org.apache.thrift.protocol.TCompactProtocol(new 
org.apache.thrift.transport.TIOStreamTransport(out)));
+      write(
+          new org.apache.thrift.protocol.TCompactProtocol(
+              new org.apache.thrift.transport.TIOStreamTransport(out)));
     } catch (org.apache.thrift.TException te) {
       throw new java.io.IOException(te);
     }
   }
 
-  private void readObject(java.io.ObjectInputStream in) throws 
java.io.IOException, ClassNotFoundException {
+  private void readObject(java.io.ObjectInputStream in)
+      throws java.io.IOException, ClassNotFoundException {
     try {
-      read(new org.apache.thrift.protocol.TCompactProtocol(new 
org.apache.thrift.transport.TIOStreamTransport(in)));
+      read(
+          new org.apache.thrift.protocol.TCompactProtocol(
+              new org.apache.thrift.transport.TIOStreamTransport(in)));
     } catch (org.apache.thrift.TException te) {
       throw new java.io.IOException(te);
     }
@@ -615,13 +633,13 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
 
   private static class RunParagraphsEventStandardScheme extends 
StandardScheme<RunParagraphsEvent> {
 
-    public void read(org.apache.thrift.protocol.TProtocol iprot, 
RunParagraphsEvent struct) throws org.apache.thrift.TException {
+    public void read(org.apache.thrift.protocol.TProtocol iprot, 
RunParagraphsEvent struct)
+        throws org.apache.thrift.TException {
       org.apache.thrift.protocol.TField schemeField;
       iprot.readStructBegin();
-      while (true)
-      {
+      while (true) {
         schemeField = iprot.readFieldBegin();
-        if (schemeField.type == org.apache.thrift.protocol.TType.STOP) { 
+        if (schemeField.type == org.apache.thrift.protocol.TType.STOP) {
           break;
         }
         switch (schemeField.id) {
@@ -629,7 +647,7 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
             if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
               struct.noteId = iprot.readString();
               struct.setNoteIdIsSet(true);
-            } else { 
+            } else {
               org.apache.thrift.protocol.TProtocolUtil.skip(iprot, 
schemeField.type);
             }
             break;
@@ -639,15 +657,14 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
                 org.apache.thrift.protocol.TList _list8 = 
iprot.readListBegin();
                 struct.paragraphIds = new ArrayList<String>(_list8.size);
                 String _elem9;
-                for (int _i10 = 0; _i10 < _list8.size; ++_i10)
-                {
+                for (int _i10 = 0; _i10 < _list8.size; ++_i10) {
                   _elem9 = iprot.readString();
                   struct.paragraphIds.add(_elem9);
                 }
                 iprot.readListEnd();
               }
               struct.setParagraphIdsIsSet(true);
-            } else { 
+            } else {
               org.apache.thrift.protocol.TProtocolUtil.skip(iprot, 
schemeField.type);
             }
             break;
@@ -657,15 +674,14 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
                 org.apache.thrift.protocol.TList _list11 = 
iprot.readListBegin();
                 struct.paragraphIndices = new ArrayList<Integer>(_list11.size);
                 int _elem12;
-                for (int _i13 = 0; _i13 < _list11.size; ++_i13)
-                {
+                for (int _i13 = 0; _i13 < _list11.size; ++_i13) {
                   _elem12 = iprot.readI32();
                   struct.paragraphIndices.add(_elem12);
                 }
                 iprot.readListEnd();
               }
               struct.setParagraphIndicesIsSet(true);
-            } else { 
+            } else {
               org.apache.thrift.protocol.TProtocolUtil.skip(iprot, 
schemeField.type);
             }
             break;
@@ -673,7 +689,7 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
             if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
               struct.curParagraphId = iprot.readString();
               struct.setCurParagraphIdIsSet(true);
-            } else { 
+            } else {
               org.apache.thrift.protocol.TProtocolUtil.skip(iprot, 
schemeField.type);
             }
             break;
@@ -688,7 +704,8 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       struct.validate();
     }
 
-    public void write(org.apache.thrift.protocol.TProtocol oprot, 
RunParagraphsEvent struct) throws org.apache.thrift.TException {
+    public void write(org.apache.thrift.protocol.TProtocol oprot, 
RunParagraphsEvent struct)
+        throws org.apache.thrift.TException {
       struct.validate();
 
       oprot.writeStructBegin(STRUCT_DESC);
@@ -700,9 +717,10 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       if (struct.paragraphIds != null) {
         oprot.writeFieldBegin(PARAGRAPH_IDS_FIELD_DESC);
         {
-          oprot.writeListBegin(new 
org.apache.thrift.protocol.TList(org.apache.thrift.protocol.TType.STRING, 
struct.paragraphIds.size()));
-          for (String _iter14 : struct.paragraphIds)
-          {
+          oprot.writeListBegin(
+              new org.apache.thrift.protocol.TList(
+                  org.apache.thrift.protocol.TType.STRING, 
struct.paragraphIds.size()));
+          for (String _iter14 : struct.paragraphIds) {
             oprot.writeString(_iter14);
           }
           oprot.writeListEnd();
@@ -712,9 +730,10 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       if (struct.paragraphIndices != null) {
         oprot.writeFieldBegin(PARAGRAPH_INDICES_FIELD_DESC);
         {
-          oprot.writeListBegin(new 
org.apache.thrift.protocol.TList(org.apache.thrift.protocol.TType.I32, 
struct.paragraphIndices.size()));
-          for (int _iter15 : struct.paragraphIndices)
-          {
+          oprot.writeListBegin(
+              new org.apache.thrift.protocol.TList(
+                  org.apache.thrift.protocol.TType.I32, 
struct.paragraphIndices.size()));
+          for (int _iter15 : struct.paragraphIndices) {
             oprot.writeI32(_iter15);
           }
           oprot.writeListEnd();
@@ -729,7 +748,6 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       oprot.writeFieldStop();
       oprot.writeStructEnd();
     }
-
   }
 
   private static class RunParagraphsEventTupleSchemeFactory implements 
SchemeFactory {
@@ -741,7 +759,8 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
   private static class RunParagraphsEventTupleScheme extends 
TupleScheme<RunParagraphsEvent> {
 
     @Override
-    public void write(org.apache.thrift.protocol.TProtocol prot, 
RunParagraphsEvent struct) throws org.apache.thrift.TException {
+    public void write(org.apache.thrift.protocol.TProtocol prot, 
RunParagraphsEvent struct)
+        throws org.apache.thrift.TException {
       TTupleProtocol oprot = (TTupleProtocol) prot;
       BitSet optionals = new BitSet();
       if (struct.isSetNoteId()) {
@@ -763,8 +782,7 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       if (struct.isSetParagraphIds()) {
         {
           oprot.writeI32(struct.paragraphIds.size());
-          for (String _iter16 : struct.paragraphIds)
-          {
+          for (String _iter16 : struct.paragraphIds) {
             oprot.writeString(_iter16);
           }
         }
@@ -772,8 +790,7 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       if (struct.isSetParagraphIndices()) {
         {
           oprot.writeI32(struct.paragraphIndices.size());
-          for (int _iter17 : struct.paragraphIndices)
-          {
+          for (int _iter17 : struct.paragraphIndices) {
             oprot.writeI32(_iter17);
           }
         }
@@ -784,7 +801,8 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
     }
 
     @Override
-    public void read(org.apache.thrift.protocol.TProtocol prot, 
RunParagraphsEvent struct) throws org.apache.thrift.TException {
+    public void read(org.apache.thrift.protocol.TProtocol prot, 
RunParagraphsEvent struct)
+        throws org.apache.thrift.TException {
       TTupleProtocol iprot = (TTupleProtocol) prot;
       BitSet incoming = iprot.readBitSet(4);
       if (incoming.get(0)) {
@@ -793,11 +811,12 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       }
       if (incoming.get(1)) {
         {
-          org.apache.thrift.protocol.TList _list18 = new 
org.apache.thrift.protocol.TList(org.apache.thrift.protocol.TType.STRING, 
iprot.readI32());
+          org.apache.thrift.protocol.TList _list18 =
+              new org.apache.thrift.protocol.TList(
+                  org.apache.thrift.protocol.TType.STRING, iprot.readI32());
           struct.paragraphIds = new ArrayList<String>(_list18.size);
           String _elem19;
-          for (int _i20 = 0; _i20 < _list18.size; ++_i20)
-          {
+          for (int _i20 = 0; _i20 < _list18.size; ++_i20) {
             _elem19 = iprot.readString();
             struct.paragraphIds.add(_elem19);
           }
@@ -806,11 +825,12 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       }
       if (incoming.get(2)) {
         {
-          org.apache.thrift.protocol.TList _list21 = new 
org.apache.thrift.protocol.TList(org.apache.thrift.protocol.TType.I32, 
iprot.readI32());
+          org.apache.thrift.protocol.TList _list21 =
+              new org.apache.thrift.protocol.TList(
+                  org.apache.thrift.protocol.TType.I32, iprot.readI32());
           struct.paragraphIndices = new ArrayList<Integer>(_list21.size);
           int _elem22;
-          for (int _i23 = 0; _i23 < _list21.size; ++_i23)
-          {
+          for (int _i23 = 0; _i23 < _list21.size; ++_i23) {
             _elem22 = iprot.readI32();
             struct.paragraphIndices.add(_elem22);
           }
@@ -823,6 +843,4 @@ public class RunParagraphsEvent implements 
org.apache.thrift.TBase<RunParagraphs
       }
     }
   }
-
 }
-

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/InterpreterOutputStream.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/InterpreterOutputStream.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/InterpreterOutputStream.java
index 258a65d..063d559 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/InterpreterOutputStream.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/InterpreterOutputStream.java
@@ -17,15 +17,14 @@
 
 package org.apache.zeppelin.interpreter.util;
 
+import java.io.IOException;
 import org.apache.zeppelin.interpreter.InterpreterOutput;
 import org.slf4j.Logger;
 
-import java.io.IOException;
-
 /**
  * Output Stream integrated with InterpreterOutput.
  *
- * Can be used to channel output from interpreters.
+ * <p>Can be used to channel output from interpreters.
  */
 public class InterpreterOutputStream extends LogOutputStream {
   private Logger logger;
@@ -49,8 +48,8 @@ public class InterpreterOutputStream extends LogOutputStream {
     if (ignoreLeadingNewLinesFromScalaReporter && b == '\n') {
       StackTraceElement[] stacks = Thread.currentThread().getStackTrace();
       for (StackTraceElement stack : stacks) {
-        if 
(stack.getClassName().equals("scala.tools.nsc.interpreter.ReplReporter") &&
-            stack.getMethodName().equals("error")) {
+        if 
(stack.getClassName().equals("scala.tools.nsc.interpreter.ReplReporter")
+            && stack.getMethodName().equals("error")) {
           // ignore. Please see ZEPPELIN-2067
           return;
         }
@@ -65,12 +64,12 @@ public class InterpreterOutputStream extends 
LogOutputStream {
   }
 
   @Override
-  public void write(byte [] b) throws IOException {
+  public void write(byte[] b) throws IOException {
     write(b, 0, b.length);
   }
 
   @Override
-  public void write(byte [] b, int off, int len) throws IOException {
+  public void write(byte[] b, int off, int len) throws IOException {
     for (int i = off; i < len; i++) {
       write(b[i]);
     }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/LogOutputStream.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/LogOutputStream.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/LogOutputStream.java
index e77f441..57405e0 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/LogOutputStream.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/util/LogOutputStream.java
@@ -22,9 +22,9 @@ import java.io.IOException;
 import java.io.OutputStream;
 
 /**
- * Minor modification of LogOutputStream of apache commons exec.
- * LogOutputStream of apache commons exec has one issue that method flush 
doesn't throw IOException,
- * so that SparkOutputStream can not extend it correctly.
+ * Minor modification of LogOutputStream of apache commons exec. 
LogOutputStream of apache commons
+ * exec has one issue that method flush doesn't throw IOException, so that 
SparkOutputStream can not
+ * extend it correctly.
  */
 public abstract class LogOutputStream extends OutputStream {
   private static final int INTIAL_SIZE = 132;
@@ -61,7 +61,6 @@ public abstract class LogOutputStream extends OutputStream {
     if (this.buffer.size() > 0) {
       this.processBuffer();
     }
-
   }
 
   @Override
@@ -99,7 +98,6 @@ public abstract class LogOutputStream extends OutputStream {
         --remaining;
       }
     }
-
   }
 
   protected void processBuffer() {

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ByteBufferInputStream.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ByteBufferInputStream.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ByteBufferInputStream.java
index efccb6a..2f75967 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ByteBufferInputStream.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ByteBufferInputStream.java
@@ -21,10 +21,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.nio.ByteBuffer;
 
-
-/**
- * InputStream from bytebuffer
- */
+/** InputStream from bytebuffer */
 public class ByteBufferInputStream extends InputStream {
 
   ByteBuffer buf;

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/DistributedResourcePool.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/DistributedResourcePool.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/DistributedResourcePool.java
index ba31f01..8a3d7e2 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/DistributedResourcePool.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/DistributedResourcePool.java
@@ -16,9 +16,7 @@
  */
 package org.apache.zeppelin.resource;
 
-/**
- * distributed resource pool
- */
+/** distributed resource pool */
 public class DistributedResourcePool extends LocalResourcePool {
 
   private final ResourcePoolConnector connector;
@@ -40,6 +38,7 @@ public class DistributedResourcePool extends 
LocalResourcePool {
 
   /**
    * get resource by name.
+   *
    * @param name
    * @param remote false only return from local resource
    * @return null if resource not found.
@@ -65,6 +64,7 @@ public class DistributedResourcePool extends 
LocalResourcePool {
 
   /**
    * get resource by name.
+   *
    * @param name
    * @param remote false only return from local resource
    * @return null if resource not found.
@@ -77,10 +77,12 @@ public class DistributedResourcePool extends 
LocalResourcePool {
     }
 
     if (remote) {
-      ResourceSet resources = connector.getAllResources()
-          .filterByNoteId(noteId)
-          .filterByParagraphId(paragraphId)
-          .filterByName(name);
+      ResourceSet resources =
+          connector
+              .getAllResources()
+              .filterByNoteId(noteId)
+              .filterByParagraphId(paragraphId)
+              .filterByName(name);
 
       if (resources.isEmpty()) {
         return null;
@@ -99,6 +101,7 @@ public class DistributedResourcePool extends 
LocalResourcePool {
 
   /**
    * Get all resource from the pool
+   *
    * @param remote false only return local resource
    * @return
    */

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/LocalResourcePool.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/LocalResourcePool.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/LocalResourcePool.java
index 7ae2273..30d5689 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/LocalResourcePool.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/LocalResourcePool.java
@@ -20,17 +20,13 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
-/**
- * ResourcePool
- */
+/** ResourcePool */
 public class LocalResourcePool implements ResourcePool {
   private final String resourcePoolId;
-  private final Map<ResourceId, Resource> resources = 
Collections.synchronizedMap(
-      new HashMap<ResourceId, Resource>());
+  private final Map<ResourceId, Resource> resources =
+      Collections.synchronizedMap(new HashMap<ResourceId, Resource>());
 
-  /**
-   * @param id unique id
-   */
+  /** @param id unique id */
   public LocalResourcePool(String id) {
     resourcePoolId = id;
   }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/RemoteResource.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/RemoteResource.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/RemoteResource.java
index 874c1cb..e05e98c 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/RemoteResource.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/RemoteResource.java
@@ -19,9 +19,7 @@ package org.apache.zeppelin.resource;
 import com.google.gson.Gson;
 import org.apache.zeppelin.common.JsonSerializable;
 
-/**
- * Resource that can retrieve data from remote
- */
+/** Resource that can retrieve data from remote */
 public class RemoteResource extends Resource implements JsonSerializable {
   private static final Gson gson = new Gson();
 
@@ -60,24 +58,21 @@ public class RemoteResource extends Resource implements 
JsonSerializable {
 
   /**
    * Call a method of the object that this remote resource holds
+   *
    * @param methodName name of method to call
    * @param paramTypes method parameter types
    * @param params method parameter values
    * @return return value of the method. Null if return value is not 
serializable
    */
   @Override
-  public Object invokeMethod(
-      String methodName, Class [] paramTypes, Object [] params) {
+  public Object invokeMethod(String methodName, Class[] paramTypes, Object[] 
params) {
     ResourceId resourceId = getResourceId();
-    return resourcePoolConnector.invokeMethod(
-        resourceId,
-        methodName,
-        paramTypes,
-        params);
+    return resourcePoolConnector.invokeMethod(resourceId, methodName, 
paramTypes, params);
   }
 
   /**
    * Call a method of the object that this remote resource holds and save 
return value as a resource
+   *
    * @param methodName name of method to call
    * @param paramTypes method parameter types
    * @param params method parameter values
@@ -86,14 +81,11 @@ public class RemoteResource extends Resource implements 
JsonSerializable {
    */
   @Override
   public Resource invokeMethod(
-      String methodName, Class [] paramTypes, Object [] params, String 
returnResourceName) {
+      String methodName, Class[] paramTypes, Object[] params, String 
returnResourceName) {
     ResourceId resourceId = getResourceId();
-    Resource resource = resourcePoolConnector.invokeMethod(
-        resourceId,
-        methodName,
-        paramTypes,
-        params,
-        returnResourceName);
+    Resource resource =
+        resourcePoolConnector.invokeMethod(
+            resourceId, methodName, paramTypes, params, returnResourceName);
     return resource;
   }
 

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/Resource.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/Resource.java 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/Resource.java
index ec95ffb..c83a510 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/Resource.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/Resource.java
@@ -17,10 +17,6 @@
 package org.apache.zeppelin.resource;
 
 import com.google.gson.Gson;
-import org.apache.zeppelin.common.JsonSerializable;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
@@ -29,10 +25,11 @@ import java.io.ObjectOutputStream;
 import java.io.Serializable;
 import java.lang.reflect.Method;
 import java.nio.ByteBuffer;
+import org.apache.zeppelin.common.JsonSerializable;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
-/**
- * Information and reference to the resource
- */
+/** Information and reference to the resource */
 public class Resource implements JsonSerializable {
   private static final Gson gson = new Gson();
 
@@ -42,12 +39,11 @@ public class Resource implements JsonSerializable {
   private final ResourceId resourceId;
   private final String className;
 
-
   /**
    * Create local resource
    *
    * @param resourceId
-   * @param r          must not be null
+   * @param r must not be null
    */
   Resource(LocalResourcePool pool, ResourceId resourceId, Object r) {
     this.r = r;
@@ -78,9 +74,7 @@ public class Resource implements JsonSerializable {
     return className;
   }
 
-  /**
-   * @return null when this is remote resource and not serializable.
-   */
+  /** @return null when this is remote resource and not serializable. */
   public Object get() {
     if (isLocal() || isSerializable()) {
       return r;
@@ -111,22 +105,18 @@ public class Resource implements JsonSerializable {
     return true;
   }
 
-
   /**
    * Call a method of the object that this resource holds
    *
    * @param methodName name of method to call
    * @param paramTypes method parameter types
-   * @param params     method parameter values
+   * @param params method parameter values
    * @return return value of the method
    */
-  public Object invokeMethod(
-      String methodName, Class[] paramTypes, Object[] params) {
+  public Object invokeMethod(String methodName, Class[] paramTypes, Object[] 
params) {
     if (r != null) {
       try {
-        Method method = r.getClass().getMethod(
-            methodName,
-            paramTypes);
+        Method method = r.getClass().getMethod(methodName, paramTypes);
         method.setAccessible(true);
         Object ret = method.invoke(r, params);
         return ret;
@@ -142,9 +132,9 @@ public class Resource implements JsonSerializable {
   /**
    * Call a method of the object that this resource holds and save return 
value as a resource
    *
-   * @param methodName         name of method to call
-   * @param paramTypes         method parameter types
-   * @param params             method parameter values
+   * @param methodName name of method to call
+   * @param paramTypes method parameter types
+   * @param params method parameter values
    * @param returnResourceName name of resource that return value will be saved
    * @return Resource that holds return value
    */
@@ -152,20 +142,10 @@ public class Resource implements JsonSerializable {
       String methodName, Class[] paramTypes, Object[] params, String 
returnResourceName) {
     if (r != null) {
       try {
-        Method method = r.getClass().getMethod(
-            methodName,
-            paramTypes);
+        Method method = r.getClass().getMethod(methodName, paramTypes);
         Object ret = method.invoke(r, params);
-        pool.put(
-            resourceId.getNoteId(),
-            resourceId.getParagraphId(),
-            returnResourceName,
-            ret
-        );
-        return pool.get(
-            resourceId.getNoteId(),
-            resourceId.getParagraphId(),
-            returnResourceName);
+        pool.put(resourceId.getNoteId(), resourceId.getParagraphId(), 
returnResourceName, ret);
+        return pool.get(resourceId.getNoteId(), resourceId.getParagraphId(), 
returnResourceName);
       } catch (Exception e) {
         logException(e);
         return null;

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceId.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceId.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceId.java
index bef9e3f..6afee96 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceId.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceId.java
@@ -19,9 +19,7 @@ package org.apache.zeppelin.resource;
 import com.google.gson.Gson;
 import org.apache.zeppelin.common.JsonSerializable;
 
-/**
- * Identifying resource
- */
+/** Identifying resource */
 public class ResourceId implements JsonSerializable {
   private static final Gson gson = new Gson();
 
@@ -69,8 +67,10 @@ public class ResourceId implements JsonSerializable {
   public boolean equals(Object o) {
     if (o instanceof ResourceId) {
       ResourceId r = (ResourceId) o;
-      return equals(r.name, name) && equals(r.resourcePoolId, resourcePoolId) 
&&
-          equals(r.noteId, noteId) && equals(r.paragraphId, paragraphId);
+      return equals(r.name, name)
+          && equals(r.resourcePoolId, resourcePoolId)
+          && equals(r.noteId, noteId)
+          && equals(r.paragraphId, paragraphId);
     } else {
       return false;
     }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePool.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePool.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePool.java
index 12b4d7a..6eb4cfe 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePool.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePool.java
@@ -16,18 +16,18 @@
  */
 package org.apache.zeppelin.resource;
 
-/**
- * Interface for ResourcePool
- */
+/** Interface for ResourcePool */
 public interface ResourcePool {
   /**
    * Get unique id of the resource pool
+   *
    * @return
    */
   String id();
 
   /**
    * Get resource from name
+   *
    * @param name Resource name
    * @return null if resource not found
    */
@@ -35,6 +35,7 @@ public interface ResourcePool {
 
   /**
    * Get resource from name
+   *
    * @param noteId
    * @param paragraphId
    * @param name Resource name
@@ -44,21 +45,22 @@ public interface ResourcePool {
 
   /**
    * Get all resources
+   *
    * @return
    */
   ResourceSet getAll();
 
   /**
    * Put an object into resource pool
+   *
    * @param name
    * @param object
    */
   void put(String name, Object object);
 
   /**
-   * Put an object into resource pool
-   * Given noteId and paragraphId is identifying resource along with name.
-   * Object will be automatically removed on related note or paragraph removal.
+   * Put an object into resource pool Given noteId and paragraphId is 
identifying resource along
+   * with name. Object will be automatically removed on related note or 
paragraph removal.
    *
    * @param noteId
    * @param paragraphId
@@ -69,6 +71,7 @@ public interface ResourcePool {
 
   /**
    * Remove object
+   *
    * @param name Resource name to remove
    * @return removed Resource. null if resource not found
    */
@@ -76,6 +79,7 @@ public interface ResourcePool {
 
   /**
    * Remove object
+   *
    * @param noteId
    * @param paragraphId
    * @param name Resource name to remove

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePoolConnector.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePoolConnector.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePoolConnector.java
index 169229b..0def33f 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePoolConnector.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourcePoolConnector.java
@@ -16,35 +16,30 @@
  */
 package org.apache.zeppelin.resource;
 
-/**
- * Connect resource pools running in remote process
- */
+/** Connect resource pools running in remote process */
 public interface ResourcePoolConnector {
   /**
    * Get list of resources from all other resource pools in remote processes
+   *
    * @return
    */
   ResourceSet getAllResources();
 
   /**
    * Read remote object
+   *
    * @return
    */
   Object readResource(ResourceId id);
 
   /**
    * Invoke method of Resource and get return
+   *
    * @return
    */
-  Object invokeMethod(
-      ResourceId id,
-      String methodName,
-      Class[] paramTypes,
-      Object[] params);
+  Object invokeMethod(ResourceId id, String methodName, Class[] paramTypes, 
Object[] params);
 
-  /**
-   * Invoke method, put result into resource pool and return
-   */
+  /** Invoke method, put result into resource pool and return */
   Resource invokeMethod(
       ResourceId id,
       String methodName,

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceSet.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceSet.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceSet.java
index 01d3c70..5690cbb 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceSet.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/ResourceSet.java
@@ -17,15 +17,12 @@
 package org.apache.zeppelin.resource;
 
 import com.google.gson.Gson;
-import org.apache.zeppelin.common.JsonSerializable;
-
 import java.util.Collection;
 import java.util.LinkedList;
 import java.util.regex.Pattern;
+import org.apache.zeppelin.common.JsonSerializable;
 
-/**
- * List of resources
- */
+/** List of resources */
 public class ResourceSet extends LinkedList<Resource> implements 
JsonSerializable {
 
   private static final Gson gson = new Gson();

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/WellKnownResourceName.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/WellKnownResourceName.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/WellKnownResourceName.java
index 4613c62..49adec6 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/WellKnownResourceName.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/resource/WellKnownResourceName.java
@@ -16,14 +16,13 @@
  */
 package org.apache.zeppelin.resource;
 
-/**
- * Well known resource names in ResourcePool
- */
+/** Well known resource names in ResourcePool */
 public enum WellKnownResourceName {
-  ZeppelinReplResult("zeppelin.repl.result"),                 // last object 
of repl
-  ZeppelinTableResult("zeppelin.paragraph.result.table");     // paragraph run 
result
+  ZeppelinReplResult("zeppelin.repl.result"), // last object of repl
+  ZeppelinTableResult("zeppelin.paragraph.result.table"); // paragraph run 
result
 
   String name;
+
   WellKnownResourceName(String name) {
     this.name = name;
   }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ExecutorFactory.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ExecutorFactory.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ExecutorFactory.java
index c09af6d..a867e9a 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ExecutorFactory.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ExecutorFactory.java
@@ -21,18 +21,14 @@ import java.util.Map;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
-/**
- *
- */
+/** */
 public class ExecutorFactory {
   private static ExecutorFactory _executor;
   private static Long _executorLock = new Long(0);
 
   Map<String, ExecutorService> executor = new HashMap<>();
 
-  public ExecutorFactory() {
-
-  }
+  public ExecutorFactory() {}
 
   public static ExecutorFactory singleton() {
     if (_executor == null) {
@@ -72,10 +68,9 @@ public class ExecutorFactory {
     }
   }
 
-
   public void shutdownAll() {
     synchronized (executor) {
-      for (String name : executor.keySet()){
+      for (String name : executor.keySet()) {
         shutdown(name);
       }
     }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/FIFOScheduler.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/FIFOScheduler.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/FIFOScheduler.java
index fd467b6..ac326d1 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/FIFOScheduler.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/FIFOScheduler.java
@@ -22,15 +22,12 @@ import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.ExecutorService;
-
 import org.apache.zeppelin.interpreter.InterpreterResult;
 import org.apache.zeppelin.scheduler.Job.Status;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-/**
- * FIFOScheduler runs submitted job sequentially
- */
+/** FIFOScheduler runs submitted job sequentially */
 public class FIFOScheduler implements Scheduler {
   List<Job> queue = new LinkedList<>();
   private ExecutorService executor;
@@ -75,8 +72,6 @@ public class FIFOScheduler implements Scheduler {
     return ret;
   }
 
-
-
   @Override
   public void submit(Job job) {
     job.setStatus(Status.PENDING);
@@ -86,7 +81,6 @@ public class FIFOScheduler implements Scheduler {
     }
   }
 
-
   @Override
   public Job removeFromWaitingQueue(String jobId) {
     synchronized (queue) {
@@ -121,54 +115,57 @@ public class FIFOScheduler implements Scheduler {
         }
 
         final Scheduler scheduler = this;
-        this.executor.execute(new Runnable() {
-          @Override
-          public void run() {
-            if (runningJob.isAborted()) {
-              runningJob.setStatus(Status.ABORT);
-              runningJob.aborted = false;
-              synchronized (queue) {
-                queue.notify();
+        this.executor.execute(
+            new Runnable() {
+              @Override
+              public void run() {
+                if (runningJob.isAborted()) {
+                  runningJob.setStatus(Status.ABORT);
+                  runningJob.aborted = false;
+                  synchronized (queue) {
+                    queue.notify();
+                  }
+                  return;
+                }
+
+                runningJob.setStatus(Status.RUNNING);
+                if (listener != null) {
+                  listener.jobStarted(scheduler, runningJob);
+                }
+                runningJob.run();
+                Object jobResult = runningJob.getReturn();
+                if (runningJob.isAborted()) {
+                  runningJob.setStatus(Status.ABORT);
+                  LOGGER.debug(
+                      "Job Aborted, " + runningJob.getId() + ", " + 
runningJob.getErrorMessage());
+                } else if (runningJob.getException() != null) {
+                  LOGGER.debug("Job Error, " + runningJob.getId() + ", " + 
runningJob.getReturn());
+                  runningJob.setStatus(Status.ERROR);
+                } else if (jobResult != null
+                    && jobResult instanceof InterpreterResult
+                    && ((InterpreterResult) jobResult).code() == 
InterpreterResult.Code.ERROR) {
+                  LOGGER.debug("Job Error, " + runningJob.getId() + ", " + 
runningJob.getReturn());
+                  runningJob.setStatus(Status.ERROR);
+                } else {
+                  LOGGER.debug(
+                      "Job Finished, "
+                          + runningJob.getId()
+                          + ", Result: "
+                          + runningJob.getReturn());
+                  runningJob.setStatus(Status.FINISHED);
+                }
+
+                if (listener != null) {
+                  listener.jobFinished(scheduler, runningJob);
+                }
+                // reset aborted flag to allow retry
+                runningJob.aborted = false;
+                runningJob = null;
+                synchronized (queue) {
+                  queue.notify();
+                }
               }
-              return;
-            }
-
-            runningJob.setStatus(Status.RUNNING);
-            if (listener != null) {
-              listener.jobStarted(scheduler, runningJob);
-            }
-            runningJob.run();
-            Object jobResult = runningJob.getReturn();
-            if (runningJob.isAborted()) {
-              runningJob.setStatus(Status.ABORT);
-              LOGGER.debug("Job Aborted, " + runningJob.getId() + ", " +
-                  runningJob.getErrorMessage());
-            } else if (runningJob.getException() != null) {
-              LOGGER.debug("Job Error, " + runningJob.getId() + ", " +
-                  runningJob.getReturn());
-              runningJob.setStatus(Status.ERROR);
-            } else if (jobResult != null && jobResult instanceof 
InterpreterResult
-                && ((InterpreterResult) jobResult).code() == 
InterpreterResult.Code.ERROR) {
-              LOGGER.debug("Job Error, " + runningJob.getId() + ", " +
-                  runningJob.getReturn());
-              runningJob.setStatus(Status.ERROR);
-            } else {
-              LOGGER.debug("Job Finished, " + runningJob.getId() + ", Result: 
" +
-                  runningJob.getReturn());
-              runningJob.setStatus(Status.FINISHED);
-            }
-
-            if (listener != null) {
-              listener.jobFinished(scheduler, runningJob);
-            }
-            // reset aborted flag to allow retry
-            runningJob.aborted = false;
-            runningJob = null;
-            synchronized (queue) {
-              queue.notify();
-            }
-          }
-        });
+            });
       }
     }
   }
@@ -180,5 +177,4 @@ public class FIFOScheduler implements Scheduler {
       queue.notify();
     }
   }
-
 }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Job.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Job.java 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Job.java
index 61c54ae..074776b 100644
--- a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Job.java
+++ b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Job.java
@@ -17,25 +17,20 @@
 
 package org.apache.zeppelin.scheduler;
 
-import org.apache.commons.lang.exception.ExceptionUtils;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Map;
-
+import org.apache.commons.lang.exception.ExceptionUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
- * Skeletal implementation of the Job concept.
- * - designed for inheritance
- * - should be run on a separate thread
- * - maintains internal state: it's status
- * - supports listeners who are updated on status change
+ * Skeletal implementation of the Job concept. - designed for inheritance - 
should be run on a
+ * separate thread - maintains internal state: it's status - supports 
listeners who are updated on
+ * status change
  *
- * Job class is serialized/deserialized and used server<->client communication
- * and saving/loading jobs from disk.
- * Changing/adding/deleting non transitive field name need consideration of 
that.
+ * <p>Job class is serialized/deserialized and used server<->client 
communication and saving/loading
+ * jobs from disk. Changing/adding/deleting non transitive field name need 
consideration of that.
  */
 public abstract class Job<T> {
   private static Logger LOGGER = LoggerFactory.getLogger(Job.class);
@@ -44,16 +39,18 @@ public abstract class Job<T> {
   /**
    * Job status.
    *
-   * UNKNOWN - Job is not found in remote
-   * READY - Job is not running, ready to run.
-   * PENDING - Job is submitted to scheduler. but not running yet
-   * RUNNING - Job is running.
-   * FINISHED - Job finished run. with success
-   * ERROR - Job finished run. with error
-   * ABORT - Job finished by abort
+   * <p>UNKNOWN - Job is not found in remote READY - Job is not running, ready 
to run. PENDING - Job
+   * is submitted to scheduler. but not running yet RUNNING - Job is running. 
FINISHED - Job
+   * finished run. with success ERROR - Job finished run. with error ABORT - 
Job finished by abort
    */
   public enum Status {
-    UNKNOWN, READY, PENDING, RUNNING, FINISHED, ERROR, ABORT;
+    UNKNOWN,
+    READY,
+    PENDING,
+    RUNNING,
+    FINISHED,
+    ERROR,
+    ABORT;
 
     public boolean isReady() {
       return this == READY;
@@ -123,9 +120,7 @@ public abstract class Job<T> {
     return status;
   }
 
-  /**
-   * just set status without notifying to listeners for spell.
-   */
+  /** just set status without notifying to listeners for spell. */
   public void setStatusWithoutNotification(Status status) {
     this.status = status;
   }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobListener.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobListener.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobListener.java
index dba2004..dda4520 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobListener.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobListener.java
@@ -17,9 +17,7 @@
 
 package org.apache.zeppelin.scheduler;
 
-/**
- * Listener for job execution.
- */
+/** Listener for job execution. */
 public interface JobListener<T extends Job> {
   void onProgressUpdate(T job, int progress);
 

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobProgressPoller.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobProgressPoller.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobProgressPoller.java
index 3d6ce12..b0faecf 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobProgressPoller.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobProgressPoller.java
@@ -25,8 +25,7 @@ import org.slf4j.LoggerFactory;
  *
  * @see Job#progress()
  * @see JobListener#onProgressUpdate(org.apache.zeppelin.scheduler.Job, int)
- *
- * TODO(moon) : add description.
+ *     <p>TODO(moon) : add description.
  */
 public class JobProgressPoller extends Thread {
   public static final long DEFAULT_INTERVAL_MSEC = 500;

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobWithProgressPoller.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobWithProgressPoller.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobWithProgressPoller.java
index d15e5e7..8e6332e 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobWithProgressPoller.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/JobWithProgressPoller.java
@@ -17,15 +17,13 @@
 
 package org.apache.zeppelin.scheduler;
 
-
 public abstract class JobWithProgressPoller<T> extends Job<T> {
 
   private transient JobProgressPoller progressPoller;
   private long progressUpdateIntervalMs;
 
-
-  public JobWithProgressPoller(String jobId, String jobName, JobListener 
listener,
-                               long progressUpdateIntervalMs) {
+  public JobWithProgressPoller(
+      String jobId, String jobName, JobListener listener, long 
progressUpdateIntervalMs) {
     super(jobId, jobName, listener);
     this.progressUpdateIntervalMs = progressUpdateIntervalMs;
   }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ParallelScheduler.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ParallelScheduler.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ParallelScheduler.java
index 6f67cd7..9e0d986 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ParallelScheduler.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/ParallelScheduler.java
@@ -22,14 +22,11 @@ import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.ExecutorService;
-
 import org.apache.zeppelin.scheduler.Job.Status;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-/**
- * Parallel scheduler runs submitted job concurrently.
- */
+/** Parallel scheduler runs submitted job concurrently. */
 public class ParallelScheduler implements Scheduler {
   List<Job> queue = new LinkedList<>();
   List<Job> running = new LinkedList<>();
@@ -41,8 +38,8 @@ public class ParallelScheduler implements Scheduler {
 
   static Logger LOGGER = LoggerFactory.getLogger(ParallelScheduler.class);
 
-  public ParallelScheduler(String name, ExecutorService executor, 
SchedulerListener listener,
-      int maxConcurrency) {
+  public ParallelScheduler(
+      String name, ExecutorService executor, SchedulerListener listener, int 
maxConcurrency) {
     this.name = name;
     this.executor = executor;
     this.listener = listener;
@@ -91,8 +88,6 @@ public class ParallelScheduler implements Scheduler {
     return ret;
   }
 
-
-
   @Override
   public void submit(Job job) {
     job.setStatus(Status.PENDING);
@@ -183,7 +178,6 @@ public class ParallelScheduler implements Scheduler {
     }
   }
 
-
   @Override
   public void stop() {
     terminate = true;
@@ -191,5 +185,4 @@ public class ParallelScheduler implements Scheduler {
       queue.notify();
     }
   }
-
 }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Scheduler.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Scheduler.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Scheduler.java
index 3055727..c0d9399 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Scheduler.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/Scheduler.java
@@ -19,9 +19,7 @@ package org.apache.zeppelin.scheduler;
 
 import java.util.Collection;
 
-/**
- * Interface for scheduler
- */
+/** Interface for scheduler */
 public interface Scheduler extends Runnable {
   String getName();
 

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerFactory.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerFactory.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerFactory.java
index b629ef7..51be949 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerFactory.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerFactory.java
@@ -20,14 +20,10 @@ package org.apache.zeppelin.scheduler;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.concurrent.ExecutorService;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-/**
- * Factory class for creating schedulers
- *
- */
+/** Factory class for creating schedulers */
 public class SchedulerFactory implements SchedulerListener {
   private static final Logger logger = 
LoggerFactory.getLogger(SchedulerFactory.class);
   protected ExecutorService executor;
@@ -107,12 +103,10 @@ public class SchedulerFactory implements 
SchedulerListener {
   @Override
   public void jobStarted(Scheduler scheduler, Job job) {
     logger.info("Job " + job.getId() + " started by scheduler " + 
scheduler.getName());
-
   }
 
   @Override
   public void jobFinished(Scheduler scheduler, Job job) {
     logger.info("Job " + job.getId() + " finished by scheduler " + 
scheduler.getName());
-
   }
 }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerListener.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerListener.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerListener.java
index 9a6b3ed..ef7b272 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerListener.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/scheduler/SchedulerListener.java
@@ -17,9 +17,7 @@
 
 package org.apache.zeppelin.scheduler;
 
-/**
- * TODO(moon) : add description.
- */
+/** TODO(moon) : add description. */
 public interface SchedulerListener {
   void jobStarted(Scheduler scheduler, Job job);
 

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ColumnDef.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ColumnDef.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ColumnDef.java
index a2fac20..dbb1355 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ColumnDef.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ColumnDef.java
@@ -18,13 +18,9 @@ package org.apache.zeppelin.tabledata;
 
 import java.io.Serializable;
 
-/**
- * Column definition
- */
+/** Column definition */
 public class ColumnDef implements Serializable {
-  /**
-   * Type
-   */
+  /** Type */
   public enum TYPE {
     STRING,
     LONG,

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/GraphEntity.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/GraphEntity.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/GraphEntity.java
index 320b144..0eafa34 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/GraphEntity.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/GraphEntity.java
@@ -19,25 +19,17 @@ package org.apache.zeppelin.tabledata;
 
 import java.util.Map;
 
-/**
- * The base network entity
- *
- */
+/** The base network entity */
 public abstract class GraphEntity {
 
   private long id;
 
-  /**
-   * The data of the entity
-   * 
-   */
+  /** The data of the entity */
   private Map<String, Object> data;
 
-  /**
-   * The primary type of the entity
-   */
+  /** The primary type of the entity */
   private String label;
-  
+
   public GraphEntity() {}
 
   public GraphEntity(long id, Map<String, Object> data, String label) {
@@ -70,5 +62,4 @@ public abstract class GraphEntity {
   public void setLabel(String label) {
     this.label = label;
   }
-
 }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/InterpreterResultTableData.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/InterpreterResultTableData.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/InterpreterResultTableData.java
index e11ad45..8fcedd2 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/InterpreterResultTableData.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/InterpreterResultTableData.java
@@ -16,19 +16,16 @@
  */
 package org.apache.zeppelin.tabledata;
 
-import org.apache.zeppelin.interpreter.InterpreterResultMessage;
-
 import java.io.Serializable;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
+import org.apache.zeppelin.interpreter.InterpreterResultMessage;
 
-/**
- * Table data with interpreter result type 'TABLE'
- */
+/** Table data with interpreter result type 'TABLE' */
 public class InterpreterResultTableData implements TableData, Serializable {
   private final InterpreterResultMessage msg;
-  ColumnDef [] columnDef;
+  ColumnDef[] columnDef;
   List<Row> rows = new LinkedList<>();
 
   public InterpreterResultTableData(InterpreterResultMessage msg) {
@@ -45,13 +42,12 @@ public class InterpreterResultTableData implements 
TableData, Serializable {
       }
 
       for (int r = 1; r < lines.length; r++) {
-        Object [] row = lines[r].split("\t");
+        Object[] row = lines[r].split("\t");
         rows.add(new Row(row));
       }
     }
   }
 
-
   @Override
   public ColumnDef[] columns() {
     return columnDef;

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Node.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Node.java 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Node.java
index 2efabc4..1f5a716 100644
--- a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Node.java
+++ b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Node.java
@@ -20,20 +20,14 @@ package org.apache.zeppelin.tabledata;
 import java.util.Map;
 import java.util.Set;
 
-/**
- * The Zeppelin Node Entity
- *
- */
+/** The Zeppelin Node Entity */
 public class Node extends GraphEntity {
 
-  /**
-   * The labels (types) attached to a node
-   */
+  /** The labels (types) attached to a node */
   private Set<String> labels;
 
   public Node() {}
 
-  
   public Node(long id, Map<String, Object> data, Set<String> labels) {
     super(id, data, labels.iterator().next());
   }
@@ -45,5 +39,4 @@ public class Node extends GraphEntity {
   public void setLabels(Set<String> labels) {
     this.labels = labels;
   }
- 
 }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ProxyRowIterator.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ProxyRowIterator.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ProxyRowIterator.java
index 8a59098..f8e60ab 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ProxyRowIterator.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/ProxyRowIterator.java
@@ -16,13 +16,10 @@
  */
 package org.apache.zeppelin.tabledata;
 
-import org.apache.zeppelin.resource.Resource;
-
 import java.util.Iterator;
+import org.apache.zeppelin.resource.Resource;
 
-/**
- * Proxy row iterator
- */
+/** Proxy row iterator */
 public class ProxyRowIterator implements Iterator<Row> {
 
   private final Resource rows;

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Relationship.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Relationship.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Relationship.java
index aa8ddb7..950ab8b 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Relationship.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Relationship.java
@@ -19,26 +19,18 @@ package org.apache.zeppelin.tabledata;
 
 import java.util.Map;
 
-/**
- * The Zeppelin Relationship entity
- *
- */
+/** The Zeppelin Relationship entity */
 public class Relationship extends GraphEntity {
 
-  /**
-   * Source node ID
-   */
+  /** Source node ID */
   private long source;
 
-  /**
-   * End node ID
-   */
+  /** End node ID */
   private long target;
 
   public Relationship() {}
 
-  public Relationship(long id, Map<String, Object> data, long source,
-      long target, String label) {
+  public Relationship(long id, Map<String, Object> data, long source, long 
target, String label) {
     super(id, data, label);
     this.setSource(source);
     this.setTarget(target);
@@ -59,5 +51,4 @@ public class Relationship extends GraphEntity {
   public void setTarget(long endNodeId) {
     this.target = endNodeId;
   }
-
 }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Row.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Row.java 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Row.java
index 9dcf2db..70207c1 100644
--- a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Row.java
+++ b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/Row.java
@@ -18,17 +18,15 @@ package org.apache.zeppelin.tabledata;
 
 import java.io.Serializable;
 
-/**
- * Row representation of table data
- */
+/** Row representation of table data */
 public class Row implements Serializable {
   private final Object[] data;
 
-  public Row(Object [] data) {
+  public Row(Object[] data) {
     this.data = data;
   }
 
-  public Object [] get() {
+  public Object[] get() {
     return data;
   }
 }

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableData.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableData.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableData.java
index ed254c5..b2fd9b0 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableData.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableData.java
@@ -18,18 +18,18 @@ package org.apache.zeppelin.tabledata;
 
 import java.util.Iterator;
 
-/**
- * Abstract representation of table data
- */
+/** Abstract representation of table data */
 public interface TableData {
   /**
    * Get column definitions
+   *
    * @return
    */
-  ColumnDef [] columns();
+  ColumnDef[] columns();
 
   /**
    * Get row iterator
+   *
    * @param
    * @return
    */

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataException.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataException.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataException.java
index d465f1a..7258650 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataException.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataException.java
@@ -18,9 +18,7 @@ package org.apache.zeppelin.tabledata;
 
 import java.io.IOException;
 
-/**
- * TableDataException
- */
+/** TableDataException */
 public class TableDataException extends IOException {
   public TableDataException(String s) {
     super(s);

http://git-wip-us.apache.org/repos/asf/zeppelin/blob/55f6c91c/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataProxy.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataProxy.java
 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataProxy.java
index 1926528..c1b3748 100644
--- 
a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataProxy.java
+++ 
b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/tabledata/TableDataProxy.java
@@ -16,13 +16,10 @@
  */
 package org.apache.zeppelin.tabledata;
 
-import org.apache.zeppelin.resource.Resource;
-
 import java.util.Iterator;
+import org.apache.zeppelin.resource.Resource;
 
-/**
- * Proxy TableData for ResourcePool
- */
+/** Proxy TableData for ResourcePool */
 public class TableDataProxy implements TableData {
   private final Resource resource;
 
@@ -32,8 +29,7 @@ public class TableDataProxy implements TableData {
 
   @Override
   public ColumnDef[] columns() {
-    return (ColumnDef[]) resource.invokeMethod(
-        "columns", null, null);
+    return (ColumnDef[]) resource.invokeMethod("columns", null, null);
   }
 
   @Override

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