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https://issues.apache.org/jira/browse/HBASE-23731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bharath Vissapragada resolved HBASE-23731.
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Fix Version/s: HBASE-18095
Resolution: Fixed
Thanks [~stack] and [~janh] for the review.
> TestFromClientSide flakey after junit upgrade
> ---------------------------------------------
>
> Key: HBASE-23731
> URL: https://issues.apache.org/jira/browse/HBASE-23731
> Project: HBase
> Issue Type: Bug
> Components: test
> Affects Versions: HBASE-18095
> Reporter: Bharath Vissapragada
> Assignee: Bharath Vissapragada
> Priority: Major
> Labels: flaky-test
> Fix For: HBASE-18095
>
>
> The cluster shutdown and restart between parameterized runs causes a thread
> leak with stacks like follows.
> {noformat}
> 2020-01-22 09:52:10,900 WARN [LeaseRenewer:hostname@localhost:62252]
> impl.LeaseRenewer(438): Failed to renew lease for
> [DFSClient_NONMAPREDUCE_-1123200667_19] for 73 seconds. Will retry shortly
> ...
> java.net.ConnectException: Call From xxxxx/xxxx to localhost:62252 failed on
> connection exception: java.net.ConnectException: Connection refused; For more
> details see: http://wiki.apache.org/hadoop/ConnectionRefused
> at sun.reflect.GeneratedConstructorAccessor64.newInstance(Unknown
> Source)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:801)
> at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:732)
> at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1493)
> at org.apache.hadoop.ipc.Client.call(Client.java:1435)
> at org.apache.hadoop.ipc.Client.call(Client.java:1345)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:227)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
> at com.sun.proxy.$Proxy29.renewLease(Unknown Source)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.renewLease(ClientNamenodeProtocolTranslatorPB.java:613)
> at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:409)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:163)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:155)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:346)
> at com.sun.proxy.$Proxy30.renewLease(Unknown Source)
> at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at org.apache.hadoop.hbase.fs.HFileSystem$1.invoke(HFileSystem.java:372)
> at com.sun.proxy.$Proxy33.renewLease(Unknown Source)
> at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at org.apache.hadoop.hbase.fs.HFileSystem$1.invoke(HFileSystem.java:372)
> at com.sun.proxy.$Proxy33.renewLease(Unknown Source)
> at org.apache.hadoop.hdfs.DFSClient.renewLease(DFSClient.java:560)
> at
> org.apache.hadoop.hdfs.client.impl.LeaseRenewer.renew(LeaseRenewer.java:395)
> at
> org.apache.hadoop.hdfs.client.impl.LeaseRenewer.run(LeaseRenewer.java:415)
> at
> org.apache.hadoop.hdfs.client.impl.LeaseRenewer.access$600(LeaseRenewer.java:76)
> at
> org.apache.hadoop.hdfs.client.impl.LeaseRenewer$1.run(LeaseRenewer.java:307)
> at java.lang.Thread.run(Thread.java:748)
> {noformat}
> While the issue existed even before, it looks like junit 4.12 somehow was
> masking it. Upgrade to 4.13 made it worse. The host:port refers to already
> shutdown hdfs cluster, so ideally this thread shouldn't be there in the first
> place. A culprit could be leaking filesystem / dfsclient objects.
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