[HADOOP-2001] Deadlock in jobtracker

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.14.0
• Fix Version/s: 0.14.4
• Assignee: Arun Murthy
• Reporter: Michael Bieniosek
• Created: 05/Oct/07 23:32
• Updated: 11/Nov/07 07:21
• Resolved: 10/Oct/07 10:48

Description

My jobtracker deadlocked; the output from kill -QUIT is:

Found one Java-level deadlock:
=============================
"IPC Server handler 2 on 10001":
waiting to lock monitor 0x0813724c (object 0xd5175488, a org.apache.hadoop.mapred.JobInProgress),
which is held by "SocketListener0-1"
"SocketListener0-1":
waiting to lock monitor 0x081146d4 (object 0xd24d9c50, a org.apache.hadoop.mapred.JobTracker),
which is held by "IPC Server handler 2 on 10001"

Java stack information for the threads listed above:
===================================================
"IPC Server handler 2 on 10001":
at org.apache.hadoop.mapred.JobInProgress.updateTaskStatus(JobInProgress.java:367)

• waiting to lock <0xd5175488> (a org.apache.hadoop.mapred.JobInProgress)
  at org.apache.hadoop.mapred.JobTracker.updateTaskStatuses(JobTracker.java:1719)
  at org.apache.hadoop.mapred.JobTracker.processHeartbeat(JobTracker.java:1240)
• locked <0xd24d9c50> (a org.apache.hadoop.mapred.JobTracker)
  at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:1116)
• locked <0xd24d9c50> (a org.apache.hadoop.mapred.JobTracker)
  at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  at java.lang.reflect.Method.invoke(Unknown Source)
  at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:340)
  at org.apache.hadoop.ipc.Server$Handler.run(Server.java:566)
  "SocketListener0-1":
  at org.apache.hadoop.mapred.JobTracker.finalizeJob(JobTracker.java:907)
• waiting to lock <0xd24d9c50> (a org.apache.hadoop.mapred.JobTracker)
  at org.apache.hadoop.mapred.JobInProgress.garbageCollect(JobInProgress.java:1059)
• locked <0xd5175488> (a org.apache.hadoop.mapred.JobInProgress)
  at org.apache.hadoop.mapred.JobInProgress.kill(JobInProgress.java:891)
• locked <0xd5175488> (a org.apache.hadoop.mapred.JobInProgress)
  at org.apache.hadoop.mapred.jobdetails_jsp._jspService(jobdetails_jsp.java:158)
  at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:427)
  at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:475)
  at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
  at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
  at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:635)
  at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
  at org.mortbay.http.HttpServer.service(HttpServer.java:954)
  at org.mortbay.http.HttpConnection.service(HttpConnection.java:814)
  at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:981)
  at org.mortbay.http.HttpConnection.handle(HttpConnection.java:831)
  at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
  at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
  at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)

Found 1 deadlock.