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https://issues.apache.org/jira/browse/HDFS-17764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17942249#comment-17942249
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ASF GitHub Bot commented on HDFS-17764:
---------------------------------------
szetszwo commented on PR #7551:
URL: https://github.com/apache/hadoop/pull/7551#issuecomment-2790465242
> ... we speculate it is due to thread inturrupt that the thread did not
complete its normal execution and did not call the close method. ...
If it is the case, we need to fix the code handling the interrupt.
> Connection#stop is blocking when FileSystem#close
> -------------------------------------------------
>
> Key: HDFS-17764
> URL: https://issues.apache.org/jira/browse/HDFS-17764
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: common
> Affects Versions: 3.3.1, 3.4.1
> Reporter: yang yang
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2025-03-28-17-04-50-157.png
>
>
> When call FileSystem.close, we found it was blocked，and thread stack is like
> following
> {quote}"http-nio-uds-exec-9" #88 daemon prio=5 os_prio=0 cpu=92.85ms
> elapsed=180245.91s tid=0x000055d7d9c6a800 nid=0x8ff in Object.wait()
> [0x00007ff473b79000]
> java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at org.apache.hadoop.ipc.Client.stop(Client.java:1438)
> - locked <0x00000000f5b44b80> (a java.lang.Object)
> at org.apache.hadoop.ipc.ClientCache.stopClient(ClientCache.java:118)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine2$Invoker.close(ProtobufRpcEngine2.java:340)
> at org.apache.hadoop.ipc.RPC.stopProxy(RPC.java:719)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.close(ClientNamenodeProtocolTranslatorPB.java:340)
> at
> org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider.close(ConfiguredFailoverProxyProvider.java:81)
> - locked <0x00000000f500e278> (a
> org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$ProxyDescriptor.close(RetryInvocationHandler.java:239)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.close(RetryInvocationHandler.java:457)
> at org.apache.hadoop.ipc.RPC.stopProxy(RPC.java:719)
> at
> org.apache.hadoop.hdfs.DFSClient.closeConnectionToNamenode(DFSClient.java:664)
> at org.apache.hadoop.hdfs.DFSClient.close(DFSClient.java:710)
> - locked <0x00000000f32b8048> (a org.apache.hadoop.hdfs.DFSClient)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.close(DistributedFileSystem.java:1573)
> {quote}
>
> !image-2025-03-28-17-04-50-157.png!
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