Elek, Marton created HDDS-377:
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Summary: Make the ScmClient closable and stop the started threads
Key: HDDS-377
URL: https://issues.apache.org/jira/browse/HDDS-377
Project: Hadoop Distributed Data Store
Issue Type: Improvement
Components: SCM Client
Reporter: Elek, Marton
Fix For: 0.2.1
Current ScmClient class opens additional threads which won't be closed. For
example SCMCLI can't stop because of this running thread:
{code}
"nioEventLoopGroup-2-1" #15 prio=10 os_prio=0 tid=0x00007f1c84c74800 nid=0x77f4
runnable [0x00007f1c52238000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
- locked <0x0000000771adf7b0> (a
org.apache.ratis.shaded.io.netty.channel.nio.SelectedSelectionKeySet)
- locked <0x0000000771ae12d8> (a java.util.Collections$UnmodifiableSet)
- locked <0x0000000771ae1010> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
at
org.apache.ratis.shaded.io.netty.channel.nio.SelectedSelectionKeySetSelector.select(SelectedSelectionKeySetSelector.java:62)
at
org.apache.ratis.shaded.io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:753)
at
org.apache.ratis.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:409)
at
org.apache.ratis.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
at
org.apache.ratis.shaded.io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)
at java.lang.Thread.run(Thread.java:745)
{code}
(Note this is netty, but the Grpc based xceiver also have some special threads).
I propose to make ScmClient auto-closable and stop the XceiverClientManager in
case of close.
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