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Doug Cutting updated HADOOP-1011: --------------------------------- Resolution: Fixed Fix Version/s: 0.13.0 Status: Resolved (was: Patch Available) I just committed this. Thanks, Tahir! > ConcurrentModificationException in JobHistory > --------------------------------------------- > > Key: HADOOP-1011 > URL: https://issues.apache.org/jira/browse/HADOOP-1011 > Project: Hadoop > Issue Type: Bug > Components: mapred > Affects Versions: 0.11.1 > Reporter: Nigel Daley > Assigned To: Tahir Hashmi > Fix For: 0.13.0 > > Attachments: 1011.patch, 1011.patch > > > Using the jobtracker web ui to look at job history. Loading multiple history > URLs concurrently in differnt browser windows yielded this exception in the > jobtracker log: > 2007-02-12 21:49:00,574 WARN /: > /taskdetailshistory.jsp?jobid=job_0001&jobTrackerId=1171157609392&taskid=tip_0001_m_002660: > java.util.ConcurrentModificationException > at java.util.HashMap$HashIterator.nextEntry(HashMap.java:787) > at java.util.HashMap$EntryIterator.next(HashMap.java:829) > at java.util.HashMap$EntryIterator.next(HashMap.java:827) > at java.util.HashMap.putAll(HashMap.java:515) > at > org.apache.hadoop.mapred.JobHistory$KeyValuePair.set(JobHistory.java:263) > at > org.apache.hadoop.mapred.JobHistory$KeyValuePair.handle(JobHistory.java:270) > at > org.apache.hadoop.mapred.DefaultJobHistoryParser$JobTasksParseListener.handle(DefaultJobHistoryParser.java:98) > at org.apache.hadoop.mapred.JobHistory.parseLine(JobHistory.java:150) > at > org.apache.hadoop.mapred.JobHistory.parseHistory(JobHistory.java:125) > at > org.apache.hadoop.mapred.DefaultJobHistoryParser.parseJobTasks(DefaultJobHistoryParser.java:38) > at > org.apache.hadoop.mapred.loadhistory_jsp._jspService(loadhistory_jsp.java:83) > 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.Dispatcher.dispatch(Dispatcher.java:275) > at org.mortbay.jetty.servlet.Dispatcher.include(Dispatcher.java:161) > at > org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966) > at > org.apache.hadoop.mapred.taskdetailshistory_jsp._jspService(taskdetailshistory_jsp.java:73) > 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) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.