[ 
https://issues.apache.org/jira/browse/HDDS-2034?focusedWorklogId=316023&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-316023
 ]

ASF GitHub Bot logged work on HDDS-2034:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 21/Sep/19 01:08
            Start Date: 21/Sep/19 01:08
    Worklog Time Spent: 10m 
      Work Description: xiaoyuyao commented on pull request #1469: HDDS-2034. 
Async RATIS pipeline creation and destroy through heartbea…
URL: https://github.com/apache/hadoop/pull/1469#discussion_r326840609
 
 

 ##########
 File path: 
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/statemachine/commandhandler/ClosePipelineCommandHandler.java
 ##########
 @@ -0,0 +1,159 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <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.
+ */
+package org.apache.hadoop.ozone.container.common.statemachine.commandhandler;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.proto.
+    StorageContainerDatanodeProtocolProtos.ClosePipelineCommandProto;
+import org.apache.hadoop.hdds.protocol.proto.
+    StorageContainerDatanodeProtocolProtos.SCMCommandProto;
+import org.apache.hadoop.hdds.ratis.RatisHelper;
+import org.apache.hadoop.hdds.scm.ScmConfigKeys;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
+import org.apache.hadoop.hdds.security.x509.SecurityConfig;
+import org.apache.hadoop.ozone.container.common.statemachine
+    .SCMConnectionManager;
+import org.apache.hadoop.ozone.container.common.statemachine.StateContext;
+import org.apache.hadoop.ozone.container.ozoneimpl.OzoneContainer;
+import org.apache.hadoop.ozone.protocol.commands.ClosePipelineCommand;
+import org.apache.hadoop.ozone.protocol.commands.SCMCommand;
+import org.apache.hadoop.util.Time;
+import org.apache.ratis.client.RaftClient;
+import org.apache.ratis.grpc.GrpcTlsConfig;
+import org.apache.ratis.protocol.RaftGroupId;
+import org.apache.ratis.protocol.RaftPeer;
+import org.apache.ratis.retry.RetryPolicy;
+import org.apache.ratis.rpc.SupportedRpcType;
+import org.apache.ratis.util.TimeDuration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+/**
+ * Handler for close pipeline command received from SCM.
+ */
+public class ClosePipelineCommandHandler implements CommandHandler {
+
+  private static final Logger LOG =
+      LoggerFactory.getLogger(ClosePipelineCommandHandler.class);
+
+  private int invocationCount;
 
 Review comment:
   Can we change this to AtomicLong?
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 316023)
    Time Spent: 1h 50m  (was: 1h 40m)

> Async RATIS pipeline creation and destroy through heartbeat commands
> --------------------------------------------------------------------
>
>                 Key: HDDS-2034
>                 URL: https://issues.apache.org/jira/browse/HDDS-2034
>             Project: Hadoop Distributed Data Store
>          Issue Type: Sub-task
>            Reporter: Sammi Chen
>            Assignee: Sammi Chen
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 1h 50m
>  Remaining Estimate: 0h
>
> Currently, pipeline creation and destroy are synchronous operations. SCM 
> directly connect to each datanode of the pipeline through gRPC channel to 
> create the pipeline to destroy the pipeline.  
> This task is to remove the gRPC channel, send pipeline creation and destroy 
> action through heartbeat command to each datanode.



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