Nige, would it be possible for you to verify this since you also
know how to reproduce the issue?
Sure, but I may not get to it for a while.
On Mar 29, 2007, at 3:02 AM, Tahir Hashmi (JIRA) wrote:
[ https://issues.apache.org/jira/browse/HADOOP-1011?
page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tahir Hashmi updated HADOOP-1011:
---------------------------------
Attachment: 1011.patch
Here's a patch that probably fixes the issue. I don't have enough
infrastructure yet to test this out. Nige, would it be possible for
you to verify this since you also know how to reproduce the issue?
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
Attachments: 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)
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