Repository: asterixdb
Updated Branches:
  refs/heads/master 860fcde90 -> 1dc8228b7


http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMergeOperation.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMergeOperation.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMergeOperation.java
index 8361f24..2c1db0f 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMergeOperation.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-invertedindex/src/main/java/org/apache/hyracks/storage/am/lsm/invertedindex/impls/LSMInvertedIndexMergeOperation.java
@@ -19,10 +19,7 @@
 
 package org.apache.hyracks.storage.am.lsm.invertedindex.impls;
 
-import java.util.List;
-
 import org.apache.hyracks.api.io.FileReference;
-import org.apache.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
 import org.apache.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
 import org.apache.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
 import org.apache.hyracks.storage.am.lsm.common.impls.MergeOperation;
@@ -34,8 +31,8 @@ public class LSMInvertedIndexMergeOperation extends 
MergeOperation {
 
     public LSMInvertedIndexMergeOperation(ILSMIndexAccessor accessor, 
IIndexCursor cursor, FileReference target,
             FileReference deletedKeysBTreeMergeTarget, FileReference 
bloomFilterMergeTarget,
-            ILSMIOOperationCallback callback, String indexIdentifier, 
List<ILSMIOOperation> dependingOps) {
-        super(accessor, target, callback, indexIdentifier, cursor, 
dependingOps);
+            ILSMIOOperationCallback callback, String indexIdentifier) {
+        super(accessor, target, callback, indexIdentifier, cursor);
         this.deletedKeysBTreeMergeTarget = deletedKeysBTreeMergeTarget;
         this.bloomFilterMergeTarget = bloomFilterMergeTarget;
     }

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/ExternalRTree.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/ExternalRTree.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/ExternalRTree.java
index 110d873..6595403 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/ExternalRTree.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/ExternalRTree.java
@@ -416,7 +416,7 @@ public class ExternalRTree extends LSMRTree implements 
ITwoPCIndex {
 
     // Not supported
     @Override
-    public ILSMIOOperation scheduleFlush(ILSMIndexOperationContext ctx, 
ILSMIOOperationCallback callback)
+    public void scheduleFlush(ILSMIndexOperationContext ctx, 
ILSMIOOperationCallback callback)
             throws HyracksDataException {
         throw new UnsupportedOperationException("flush not supported in 
LSM-Disk-Only-RTree");
     }
@@ -623,7 +623,7 @@ public class ExternalRTree extends LSMRTree implements 
ITwoPCIndex {
     // The only change the the schedule merge is the method used to create the
     // opCtx. first line <- in schedule merge, we->
     @Override
-    public ILSMIOOperation scheduleMerge(ILSMIndexOperationContext ctx, 
ILSMIOOperationCallback callback)
+    public void scheduleMerge(ILSMIndexOperationContext ctx, 
ILSMIOOperationCallback callback)
             throws HyracksDataException {
         ILSMIndexOperationContext rctx = 
createOpContext(NoOpOperationCallback.INSTANCE, -1);
         rctx.setOperation(IndexOperation.MERGE);
@@ -634,12 +634,10 @@ public class ExternalRTree extends LSMRTree implements 
ITwoPCIndex {
                         (ILSMDiskComponent) 
mergingComponents.get(mergingComponents.size() - 1));
         ILSMIndexAccessor accessor = new LSMRTreeAccessor(getLsmHarness(), 
rctx, buddyBTreeFields);
         // create the merge operation.
-        ILSMIOOperation mergeOp =
-                new LSMRTreeMergeOperation(accessor, cursor, 
relMergeFileRefs.getInsertIndexFileReference(),
-                        relMergeFileRefs.getDeleteIndexFileReference(), 
relMergeFileRefs.getBloomFilterFileReference(),
-                        callback, fileManager.getBaseDir().getAbsolutePath(), 
ctx.getDependingOps());
+        LSMRTreeMergeOperation mergeOp = new LSMRTreeMergeOperation(accessor, 
cursor,
+                relMergeFileRefs.getInsertIndexFileReference(), 
relMergeFileRefs.getDeleteIndexFileReference(),
+                relMergeFileRefs.getBloomFilterFileReference(), callback, 
fileManager.getBaseDir().getAbsolutePath());
         ioScheduler.scheduleOperation(mergeOp);
-        return mergeOp;
     }
 
     @Override

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTree.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTree.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTree.java
index a4d6a65..ca0e4e1 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTree.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTree.java
@@ -420,7 +420,7 @@ public class LSMRTree extends AbstractLSMRTree {
         LSMRTreeAccessor accessor = new LSMRTreeAccessor(getLsmHarness(), 
opCtx, buddyBTreeFields);
         return new LSMRTreeFlushOperation(accessor, 
componentFileRefs.getInsertIndexFileReference(),
                 componentFileRefs.getDeleteIndexFileReference(), 
componentFileRefs.getBloomFilterFileReference(),
-                callback, fileManager.getBaseDir().getAbsolutePath(), 
opCtx.getDependingOps());
+                callback, fileManager.getBaseDir().getAbsolutePath());
     }
 
     @Override
@@ -430,6 +430,6 @@ public class LSMRTree extends AbstractLSMRTree {
         ILSMIndexAccessor accessor = new LSMRTreeAccessor(getLsmHarness(), 
opCtx, buddyBTreeFields);
         return new LSMRTreeMergeOperation(accessor, cursor, 
mergeFileRefs.getInsertIndexFileReference(),
                 mergeFileRefs.getDeleteIndexFileReference(), 
mergeFileRefs.getBloomFilterFileReference(), callback,
-                fileManager.getBaseDir().getAbsolutePath(), 
opCtx.getDependingOps());
+                fileManager.getBaseDir().getAbsolutePath());
     }
 }

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFlushOperation.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFlushOperation.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFlushOperation.java
index a08d854..6991c56 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFlushOperation.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeFlushOperation.java
@@ -18,10 +18,7 @@
  */
 package org.apache.hyracks.storage.am.lsm.rtree.impls;
 
-import java.util.List;
-
 import org.apache.hyracks.api.io.FileReference;
-import org.apache.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
 import org.apache.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
 import org.apache.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
 import org.apache.hyracks.storage.am.lsm.common.impls.FlushOperation;
@@ -32,9 +29,8 @@ public class LSMRTreeFlushOperation extends FlushOperation {
     private final FileReference bloomFilterFlushTarget;
 
     public LSMRTreeFlushOperation(ILSMIndexAccessor accessor, FileReference 
flushTarget, FileReference btreeFlushTarget,
-            FileReference bloomFilterFlushTarget, ILSMIOOperationCallback 
callback, String indexIdentifier,
-            List<ILSMIOOperation> dependingOps) {
-        super(accessor, flushTarget, callback, indexIdentifier, dependingOps);
+            FileReference bloomFilterFlushTarget, ILSMIOOperationCallback 
callback, String indexIdentifier) {
+        super(accessor, flushTarget, callback, indexIdentifier);
         this.btreeFlushTarget = btreeFlushTarget;
         this.bloomFilterFlushTarget = bloomFilterFlushTarget;
     }

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMergeOperation.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMergeOperation.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMergeOperation.java
index a07e57b..83872cf 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMergeOperation.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeMergeOperation.java
@@ -18,11 +18,8 @@
  */
 package org.apache.hyracks.storage.am.lsm.rtree.impls;
 
-import java.util.List;
-
 import org.apache.hyracks.api.io.FileReference;
 import org.apache.hyracks.storage.am.common.api.ITreeIndexCursor;
-import org.apache.hyracks.storage.am.lsm.common.api.ILSMIOOperation;
 import org.apache.hyracks.storage.am.lsm.common.api.ILSMIOOperationCallback;
 import org.apache.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
 import org.apache.hyracks.storage.am.lsm.common.impls.MergeOperation;
@@ -33,8 +30,8 @@ public class LSMRTreeMergeOperation extends MergeOperation {
 
     public LSMRTreeMergeOperation(ILSMIndexAccessor accessor, ITreeIndexCursor 
cursor, FileReference target,
             FileReference btreeMergeTarget, FileReference 
bloomFilterMergeTarget, ILSMIOOperationCallback callback,
-            String indexIdentifier, List<ILSMIOOperation> dependingOps) {
-        super(accessor, target, callback, indexIdentifier, cursor, 
dependingOps);
+            String indexIdentifier) {
+        super(accessor, target, callback, indexIdentifier, cursor);
         this.btreeMergeTarget = btreeMergeTarget;
         this.bloomFilterMergeTarget = bloomFilterMergeTarget;
     }

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuples.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuples.java
 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuples.java
index a18f10c..1e15455 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuples.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-rtree/src/main/java/org/apache/hyracks/storage/am/lsm/rtree/impls/LSMRTreeWithAntiMatterTuples.java
@@ -332,7 +332,7 @@ public class LSMRTreeWithAntiMatterTuples extends 
AbstractLSMRTree {
             throws HyracksDataException {
         ILSMIndexAccessor accessor = new LSMTreeIndexAccessor(getLsmHarness(), 
opCtx, cursorFactory);
         return new LSMRTreeFlushOperation(accessor, 
componentFileRefs.getInsertIndexFileReference(), null, null,
-                callback, fileManager.getBaseDir().getAbsolutePath(), 
opCtx.getDependingOps());
+                callback, fileManager.getBaseDir().getAbsolutePath());
     }
 
     @Override
@@ -346,6 +346,6 @@ public class LSMRTreeWithAntiMatterTuples extends 
AbstractLSMRTree {
         ITreeIndexCursor cursor = new 
LSMRTreeWithAntiMatterTuplesSearchCursor(opCtx, returnDeletedTuples);
         ILSMIndexAccessor accessor = new LSMTreeIndexAccessor(getLsmHarness(), 
opCtx, cursorFactory);
         return new MergeOperation(accessor, 
mergeFileRefs.getInsertIndexFileReference(), callback,
-                fileManager.getBaseDir().getAbsolutePath(), cursor, 
opCtx.getDependingOps());
+                fileManager.getBaseDir().getAbsolutePath(), cursor);
     }
 }

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFileManagerTest.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFileManagerTest.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFileManagerTest.java
index 4f7515e..5d6d8de 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFileManagerTest.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFileManagerTest.java
@@ -72,7 +72,7 @@ public class LSMBTreeFileManagerTest {
         accessor.insert(tuple);
 
         // Flush to generate a disk component
-        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
 null);
+        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback());
 
         // Make sure the disk component was generated
         LSMBTree btree = (LSMBTree) ctx.getIndex();

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFilterMergeTestDriver.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFilterMergeTestDriver.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFilterMergeTestDriver.java
index 98faf01..c5eb97c 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFilterMergeTestDriver.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeFilterMergeTestDriver.java
@@ -117,7 +117,7 @@ public abstract class LSMBTreeFilterMergeTestDriver extends 
OrderedIndexTestDriv
 
                 StubIOOperationCallback stub = new StubIOOperationCallback();
                 BlockingIOOperationCallbackWrapper waiter = new 
BlockingIOOperationCallbackWrapper(stub);
-                accessor.scheduleFlush(waiter, null);
+                accessor.scheduleFlush(waiter);
                 waiter.waitForIO();
                 if (minMax != null) {
                     Pair<ITupleReference, ITupleReference> obsMinMax =
@@ -146,7 +146,7 @@ public abstract class LSMBTreeFilterMergeTestDriver extends 
OrderedIndexTestDriv
                 }
             }
             
accessor.scheduleMerge(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
-                    ((LSMBTree) ctx.getIndex()).getDiskComponents(), null);
+                    ((LSMBTree) ctx.getIndex()).getDiskComponents());
 
             flushedComponents = ((LSMBTree) 
ctx.getIndex()).getDiskComponents();
             Pair<ITupleReference, ITupleReference> mergedMinMax =

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeMergeTestDriver.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeMergeTestDriver.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeMergeTestDriver.java
index 15dbfdb..7dac1e5 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeMergeTestDriver.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeMergeTestDriver.java
@@ -76,7 +76,7 @@ public abstract class LSMBTreeMergeTestDriver extends 
OrderedIndexTestDriver {
 
             ILSMIndexAccessor accessor = (ILSMIndexAccessor) 
ctx.getIndexAccessor();
             
accessor.scheduleMerge(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
-                    ((LSMBTree) ctx.getIndex()).getDiskComponents(), null);
+                    ((LSMBTree) ctx.getIndex()).getDiskComponents());
 
             orderedIndexTestUtils.checkPointSearches(ctx);
             orderedIndexTestUtils.checkScan(ctx);

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeModificationOperationCallbackTest.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeModificationOperationCallbackTest.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeModificationOperationCallbackTest.java
index 11ecf0b..b633614 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeModificationOperationCallbackTest.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeModificationOperationCallbackTest.java
@@ -81,7 +81,7 @@ public class LSMBTreeModificationOperationCallbackTest 
extends AbstractModificat
             }
 
             if (j == 1) {
-                accessor.scheduleFlush(ioOpCallback, null);
+                accessor.scheduleFlush(ioOpCallback);
                 ioOpCallback.waitForIO();
                 isFoundNull = true;
             } else {
@@ -94,7 +94,7 @@ public class LSMBTreeModificationOperationCallbackTest 
extends AbstractModificat
             }
 
             if (j == 1) {
-                accessor.scheduleFlush(ioOpCallback, null);
+                accessor.scheduleFlush(ioOpCallback);
                 ioOpCallback.waitForIO();
                 isFoundNull = true;
             } else {
@@ -106,7 +106,7 @@ public class LSMBTreeModificationOperationCallbackTest 
extends AbstractModificat
                 accessor.delete(tuple);
             }
 
-            accessor.scheduleFlush(ioOpCallback, null);
+            accessor.scheduleFlush(ioOpCallback);
             ioOpCallback.waitForIO();
         }
     }

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeScanDiskComponentsTest.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeScanDiskComponentsTest.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeScanDiskComponentsTest.java
index f3cf9de..acbeaef 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeScanDiskComponentsTest.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeScanDiskComponentsTest.java
@@ -19,7 +19,7 @@
 
 package org.apache.hyracks.storage.am.lsm.btree;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.fail;
 
 import java.io.ByteArrayInputStream;
 import java.io.DataInput;
@@ -116,17 +116,17 @@ public class LSMBTreeScanDiskComponentsTest extends 
OrderedIndexTestDriver {
         //component 2 contains 1 and 2
         upsertTuple(ctx, fieldSerdes, getValue(1, fieldSerdes));
         upsertTuple(ctx, fieldSerdes, getValue(2, fieldSerdes));
-        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
 null);
+        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback());
 
         //component 1 contains 1 and -2
         upsertTuple(ctx, fieldSerdes, getValue(1, fieldSerdes));
         deleteTuple(ctx, fieldSerdes, getValue(2, fieldSerdes));
-        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
 null);
+        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback());
 
         //component 0 contains 2 and 3
         upsertTuple(ctx, fieldSerdes, getValue(3, fieldSerdes));
         upsertTuple(ctx, fieldSerdes, getValue(2, fieldSerdes));
-        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
 null);
+        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback());
 
         LSMBTree btree = (LSMBTree) ctx.getIndex();
         Assert.assertEquals("Check disk components", 3, 
btree.getDiskComponents().size());

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceScanDiskComponentsTest.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceScanDiskComponentsTest.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceScanDiskComponentsTest.java
index a7efd6d..fbcbcc2 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceScanDiskComponentsTest.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceScanDiskComponentsTest.java
@@ -19,7 +19,7 @@
 
 package org.apache.hyracks.storage.am.lsm.btree;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.fail;
 
 import java.io.ByteArrayInputStream;
 import java.io.DataInput;
@@ -352,7 +352,7 @@ public class LSMBTreeUpdateInPlaceScanDiskComponentsTest 
extends OrderedIndexTes
         op1.performOperation(ctx, 
AccessMethodTestsConfig.BTREE_NUM_TUPLES_TO_INSERT);
         op2.performOperation(ctx,
                 AccessMethodTestsConfig.BTREE_NUM_TUPLES_TO_INSERT / 
AccessMethodTestsConfig.BTREE_NUM_INSERT_ROUNDS);
-        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
 null);
+        
accessor.scheduleFlush(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback());
 
         LSMBTree btree = (LSMBTree) ctx.getIndex();
         Assert.assertEquals("Check disk components", 1, 
btree.getDiskComponents().size());

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceTest.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceTest.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceTest.java
index adcb3d9..e059faa 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceTest.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/LSMBTreeUpdateInPlaceTest.java
@@ -109,7 +109,7 @@ public class LSMBTreeUpdateInPlaceTest extends 
AbstractOperationCallbackTest {
             }
 
             if (j == 1) {
-                lsmAccessor.scheduleFlush(ioOpCallback, null);
+                lsmAccessor.scheduleFlush(ioOpCallback);
                 ioOpCallback.waitForIO();
                 isFoundNull = true;
                 isUpdated = false;
@@ -124,7 +124,7 @@ public class LSMBTreeUpdateInPlaceTest extends 
AbstractOperationCallbackTest {
             }
 
             if (j == 1) {
-                lsmAccessor.scheduleFlush(ioOpCallback, null);
+                lsmAccessor.scheduleFlush(ioOpCallback);
                 ioOpCallback.waitForIO();
             } else {
                 isFoundNull = false;

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestLsmBtree.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestLsmBtree.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestLsmBtree.java
index 0e16280..6c1a406 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestLsmBtree.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/impl/TestLsmBtree.java
@@ -103,19 +103,17 @@ public class TestLsmBtree extends LSMBTree {
     }
 
     @Override
-    public ILSMIOOperation scheduleFlush(ILSMIndexOperationContext ctx, 
ILSMIOOperationCallback callback)
+    public void scheduleFlush(ILSMIndexOperationContext ctx, 
ILSMIOOperationCallback callback)
             throws HyracksDataException {
-        ILSMIOOperation flushOp = super.scheduleFlush(ctx, callback);
+        super.scheduleFlush(ctx, callback);
         numScheduledFlushes++;
-        return flushOp;
     }
 
     @Override
-    public ILSMIOOperation scheduleMerge(ILSMIndexOperationContext ctx, 
ILSMIOOperationCallback callback)
+    public void scheduleMerge(ILSMIndexOperationContext ctx, 
ILSMIOOperationCallback callback)
             throws HyracksDataException {
-        ILSMIOOperation mergeOp = super.scheduleMerge(ctx, callback);
+        super.scheduleMerge(ctx, callback);
         numScheduledMerges++;
-        return mergeOp;
     }
 
     @Override

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorker.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorker.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorker.java
index 377ce05..1667e47 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorker.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/multithread/LSMBTreeTestWorker.java
@@ -119,7 +119,7 @@ public class LSMBTreeTestWorker extends 
AbstractIndexTestWorker {
 
             case MERGE:
                 
accessor.scheduleMerge(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
-                        lsmBTree.getDiskComponents(), null);
+                        lsmBTree.getDiskComponents());
                 break;
 
             default:

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/org/apache/hyracks/storage/am/lsm/common/test/PrefixMergePolicyTest.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/org/apache/hyracks/storage/am/lsm/common/test/PrefixMergePolicyTest.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/org/apache/hyracks/storage/am/lsm/common/test/PrefixMergePolicyTest.java
index eaa0321..e521b4b 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/org/apache/hyracks/storage/am/lsm/common/test/PrefixMergePolicyTest.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-common-test/src/test/java/org/apache/hyracks/storage/am/lsm/common/test/PrefixMergePolicyTest.java
@@ -221,7 +221,7 @@ public class PrefixMergePolicyTest extends TestCase {
                 return null;
             }
         
}).when(accessor).scheduleMerge(Mockito.any(ILSMIOOperationCallback.class),
-                Mockito.anyListOf(ILSMDiskComponent.class), Mockito.any());
+                Mockito.anyListOf(ILSMDiskComponent.class));
 
         
Mockito.when(index.createAccessor(Mockito.any(IModificationOperationCallback.class),
                 
Mockito.any(ISearchOperationCallback.class))).thenReturn(accessor);

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMergeTest.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMergeTest.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMergeTest.java
index fd744b0..d093aac 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMergeTest.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/LSMInvertedIndexMergeTest.java
@@ -58,7 +58,7 @@ public class LSMInvertedIndexMergeTest extends 
AbstractInvertedIndexLoadTest {
             }
             // Perform merge.
             
invIndexAccessor.scheduleMerge(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
-                    ((LSMInvertedIndex) invIndex).getDiskComponents(), null);
+                    ((LSMInvertedIndex) invIndex).getDiskComponents());
             validateAndCheckIndex(testCtx);
             runTinySearchWorkload(testCtx, tupleGen);
         }

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMergeTest.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMergeTest.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMergeTest.java
index cfca8f1..3dc7262 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMergeTest.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/PartitionedLSMInvertedIndexMergeTest.java
@@ -60,7 +60,7 @@ public class PartitionedLSMInvertedIndexMergeTest extends 
AbstractInvertedIndexL
             }
             // Perform merge.
             
invIndexAccessor.scheduleMerge(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
-                    ((LSMInvertedIndex) invIndex).getDiskComponents(), null);
+                    ((LSMInvertedIndex) invIndex).getDiskComponents());
             validateAndCheckIndex(testCtx);
             runTinySearchWorkload(testCtx, tupleGen);
         }

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexTestWorker.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexTestWorker.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexTestWorker.java
index 594e019..2345698 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexTestWorker.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-invertedindex-test/src/test/java/org/apache/hyracks/storage/am/lsm/invertedindex/multithread/LSMInvertedIndexTestWorker.java
@@ -116,7 +116,7 @@ public class LSMInvertedIndexTestWorker extends 
AbstractIndexTestWorker {
 
             case MERGE: {
                 
accessor.scheduleMerge(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
-                        invIndex.getDiskComponents(), null);
+                        invIndex.getDiskComponents());
                 break;
             }
 

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTestDriver.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTestDriver.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTestDriver.java
index 58c71dd..9209a3e 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTestDriver.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/LSMRTreeMergeTestDriver.java
@@ -78,7 +78,7 @@ public abstract class LSMRTreeMergeTestDriver extends 
AbstractRTreeTestDriver {
 
             ILSMIndexAccessor accessor = (ILSMIndexAccessor) 
ctx.getIndexAccessor();
             
accessor.scheduleMerge(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
-                    ((AbstractLSMRTree) ctx.getIndex()).getDiskComponents(), 
null);
+                    ((AbstractLSMRTree) ctx.getIndex()).getDiskComponents());
 
             rTreeTestUtils.checkScan(ctx);
             rTreeTestUtils.checkDiskOrderScan(ctx);

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorker.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorker.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorker.java
index 4630c28..fe4870b 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorker.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeTestWorker.java
@@ -79,7 +79,7 @@ public class LSMRTreeTestWorker extends 
AbstractIndexTestWorker {
 
             case MERGE:
                 
accessor.scheduleMerge(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
-                        lsmRTree.getDiskComponents(), null);
+                        lsmRTree.getDiskComponents());
                 break;
 
             default:

http://git-wip-us.apache.org/repos/asf/asterixdb/blob/1dc8228b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorker.java
----------------------------------------------------------------------
diff --git 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorker.java
 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorker.java
index bbada89..2855f2e 100644
--- 
a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorker.java
+++ 
b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-rtree-test/src/test/java/org/apache/hyracks/storage/am/lsm/rtree/multithread/LSMRTreeWithAntiMatterTuplesTestWorker.java
@@ -68,7 +68,7 @@ public class LSMRTreeWithAntiMatterTuplesTestWorker extends 
AbstractLSMRTreeTest
 
             case MERGE:
                 
accessor.scheduleMerge(NoOpIOOperationCallbackFactory.INSTANCE.createIoOpCallback(),
-                        ((AbstractLSMRTree) lsmRTree).getDiskComponents(), 
null);
+                        ((AbstractLSMRTree) lsmRTree).getDiskComponents());
                 break;
 
             default:

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