[HADOOP-15335] Support xxxxxxx:xxx/stacks print lock info and more useful attribute of thread info - ASF JIRA

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Details

Type: Improvement
Status: Patch Available
Priority: Major
Resolution: Unresolved
Affects Version/s: 3.0.0
Fix Version/s: None
Component/s: common
Labels:
None

Description

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