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Date: Fri, 14 Apr 2017 02:20:41 +0000 (UTC)
From: "Duo Zhang (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.13063271.1491933570000.281353.1492136441657@Atlassian.JIRA>
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Subject: [jira] [Commented] (HBASE-17904) Get runs into
 NoSuchElementException when using Read Replica, with hbase.
 ipc.client.specificThreadForWriting to be true and hbase.rpc.client.impl to
 be org.apache.hadoop.hbase.ipc.RpcClientImpl
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archived-at: Fri, 14 Apr 2017 02:20:51 -0000


    [ https://issues.apache.org/jira/browse/HBASE-17904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15968508#comment-15968508 ] 

Duo Zhang commented on HBASE-17904:
-----------------------------------

{code:title=BlockingRpcConnection,java}
      @Override
      public void run(Object parameter) {
        setCancelled(call);
        synchronized (BlockingRpcConnection.this) {
          if (callSender != null) {
            callSender.remove(call); // <== this is line 760
          } else {
            calls.remove(call.id);
          }
        }
      }
{code}

Sorry, the cancellation callback is not called directly but we also have a synchronization there. 

Thanks.

> Get runs into NoSuchElementException when using Read Replica, with hbase. ipc.client.specificThreadForWriting to be true and hbase.rpc.client.impl to be org.apache.hadoop.hbase.ipc.RpcClientImpl
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-17904
>                 URL: https://issues.apache.org/jira/browse/HBASE-17904
>             Project: HBase
>          Issue Type: Bug
>          Components: Client, IPC/RPC
>    Affects Versions: 2.0.0, 1.4.0, 1.5.0
>            Reporter: huaxiang sun
>            Assignee: huaxiang sun
>             Fix For: 2.0.0, 1.4.0, 1.5.0
>
>         Attachments: HBASE-17904-master-v001.patch
>
>
> When testing read replica with 2.0.0 code, with the following config
> {code}
>   <property>
>     <name>hbase.ipc.client.specificThreadForWriting</name>
>     <value>true</value>
>   </property>
>   <property>
>     <name>hbase.rpc.client.impl</name>
>     <value>org.apache.hadoop.hbase.ipc.RpcClientImpl</value>
>   </property>
> {code}
> The hbase client runs into the following exception
> {code}
> Exception in thread "main" java.util.NoSuchElementException
>         at java.util.ArrayDeque.removeFirst(ArrayDeque.java:280)
>         at java.util.ArrayDeque.remove(ArrayDeque.java:447)
>         at org.apache.hadoop.hbase.ipc.BlockingRpcConnection$CallSender.remove(BlockingRpcConnection.java:159)
>         at org.apache.hadoop.hbase.ipc.BlockingRpcConnection$3.run(BlockingRpcConnection.java:760)
>         at org.apache.hadoop.hbase.ipc.HBaseRpcControllerImpl.startCancel(HBaseRpcControllerImpl.java:229)
>         at org.apache.hadoop.hbase.client.CancellableRegionServerCallable.cancel(CancellableRegionServerCallable.java:86)
>         at org.apache.hadoop.hbase.client.ResultBoundedCompletionService$QueueingFuture.cancel(ResultBoundedCompletionService.java:106)
>         at org.apache.hadoop.hbase.client.ResultBoundedCompletionService.cancelAll(ResultBoundedCompletionService.java:274)
>         at org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.call(RpcRetryingCallerWithReadReplicas.java:224)
>         at org.apache.hadoop.hbase.client.HTable.get(HTable.java:445)
>         at org.apache.hadoop.hbase.client.HTable.get(HTable.java:409)
>         at HBaseThreadedGet.doWork(HBaseThreadedGet.java:45)
>         at HBaseThreadedGet.main(HBaseThreadedGet.java:19)
> {code}


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