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From "Yiran Wu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-15335) Support xxxxxxx:xxx/stacks print lock info and more useful attribute of thread info
Date Thu, 22 Mar 2018 03:54:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yiran Wu updated HADOOP-15335:
------------------------------
    Attachment: HADOOP-15335.001.patch

> Support xxxxxxx:xxx/stacks print lock info and more useful attribute of thread info
> -----------------------------------------------------------------------------------
>
>                 Key: HADOOP-15335
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15335
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: common
>    Affects Versions: 3.0.0
>            Reporter: Yiran Wu
>            Priority: Major
>         Attachments: HADOOP-15335.001.patch
>
>
> Print stack information and other info show in WebUI
> http://namenode:50070/stacks?contentionTracing=true
> ```
> Thread 2 (Reference Handler):
>   State: WAITING
>   Blocked count: 8
>   Waited count: 5
>   Thread CpuTime: 5910000
>   Thread UserTime: 5754000
>   Thread allocatedBytes: 0
>   Waiting on java.lang.ref.Reference$Lock@4b3ed2f0
>   Blocked by -1
>   Stack:
>     java.lang.Object.wait(Native Method)
>     java.lang.Object.wait(Object.java:502)
>     java.lang.ref.Reference.tryHandlePending(Reference.java:191)
>     java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)
> Thread 1 (main):
>   State: WAITING
>   Blocked count: 4
>   Waited count: 2
>   Thread CpuTime: 2563937000
>   Thread UserTime: 2222977000
>   Thread allocatedBytes: 229115520
>   Waiting on org.apache.hadoop.ipc.ProtobufRpcEngine$Server@442a2e48
>   Blocked by -1
>   Stack:
>     java.lang.Object.wait(Native Method)
>     java.lang.Object.wait(Object.java:502)
>     org.apache.hadoop.ipc.Server.join(Server.java:2498)
>     org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.join(NameNodeRpcServer.java:442)
>     org.apache.hadoop.hdfs.server.namenode.NameNode.join(NameNode.java:865)
>     org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1573)
> ---------------------------------------------------------
> Locks info:
> ---------------------------------------------------------
> java.util.concurrent.locks.ReentrantReadWriteLock$FairSync@cd6c71a lockedBy Thread 43
(IPC Server handler 7 on 8020) 
>   Waiting thread num: 6
>   Stack:
>     org.apache.hadoop.hdfs.server.namenode.FSNamesystem.renameTo(FSNamesystem.java:3665)
>     org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.rename(NameNodeRpcServer.java:868)
>     org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.rename(ClientNamenodeProtocolServerSideTranslatorPB.java:583)
>     org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
>     org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
>     org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
>     org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2076)
>     org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2072)
>     java.security.AccessController.doPrivileged(Native Method)
>     javax.security.auth.Subject.doAs(Subject.java:422)
>     org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1803)
>     org.apache.hadoop.ipc.Server$Handler.run(Server.java:2072)
> java.lang.ref.ReferenceQueue$Lock@31bcf236 lockedBy UNKNOW
> java.lang.ref.Reference$Lock@4b3ed2f0 lockedBy UNKNOW
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server@442a2e48 lockedBy UNKNOW
> ```



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