[jira] [Updated] (HBASE-11277) RPCServer threads can wedge under high load

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-11277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell updated HBASE-11277:
-----------------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed
          Status: Resolved  (was: Patch Available)

Committed to 0.96+. Thanks for the reviews!

> RPCServer threads can wedge under high load
> -------------------------------------------
>
>                 Key: HBASE-11277
>                 URL: https://issues.apache.org/jira/browse/HBASE-11277
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.96.2, 0.98.3
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Critical
>             Fix For: 0.99.0, 0.96.3, 0.98.3
>
>         Attachments: HBASE-11277.patch
>
>
> This is with 0.98.0 in an insecure setup with 7u55 and 7u60. Under high load, RPCServer threads can wedge, fail to make progess, and consume 100% CPU time on a core indefinitely. 
> Dumping threads, all threads are in BLOCKED or IN_NATIVE state. The IN_NATIVE threads are mostly in EPollArrayWrapper.epollWait or FileDispatcherImpl.read0. The number of threads found in FileDispatcherImpl.read0 correspond to the number of runaway threads expected based on looking at 'top' output. These look like:
> {noformat}
> Thread 64758: (state = IN_NATIVE)
>  - sun.nio.ch.FileDispatcherImpl.read0(java.io.FileDescriptor, long, int) @bci=0 (Compiled frame; information may be imprecise)
>  - sun.nio.ch.SocketDispatcher.read(java.io.FileDescriptor, long, int) @bci=4, line=39 (Compiled frame)
>  - sun.nio.ch.IOUtil.readIntoNativeBuffer(java.io.FileDescriptor, java.nio.ByteBuffer, long, sun.nio.ch.NativeDispatcher) @bci=114, line=223 (Compil
> ed frame)
>  - sun.nio.ch.IOUtil.read(java.io.FileDescriptor, java.nio.ByteBuffer, long, sun.nio.ch.NativeDispatcher) @bci=48, line=197 (Compiled frame)
>  - sun.nio.ch.SocketChannelImpl.read(java.nio.ByteBuffer) @bci=234, line=379 (Compiled frame)
>  - org.apache.hadoop.hbase.ipc.RpcServer.channelRead(java.nio.channels.ReadableByteChannel, java.nio.ByteBuffer) @bci=12, line=2224 (Compiled frame)
>  - org.apache.hadoop.hbase.ipc.RpcServer$Connection.readAndProcess() @bci=509, line=1488 (Compiled frame)
>  - org.apache.hadoop.hbase.ipc.RpcServer$Listener.doRead(java.nio.channels.SelectionKey) @bci=23, line=790 (Compiled frame)
>  - org.apache.hadoop.hbase.ipc.RpcServer$Listener$Reader.doRunLoop() @bci=97, line=581 (Compiled frame)
>  - org.apache.hadoop.hbase.ipc.RpcServer$Listener$Reader.run() @bci=1, line=556 (Interpreted frame)
>  - java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) @bci=95, line=1145 (Interpreted frame)
>  - java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5, line=615 (Interpreted frame)
>  - java.lang.Thread.run() @bci=11, line=745 (Interpreted frame)
> {noformat}



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