Benoit Sigoure created MAPREDUCE-5600:
-----------------------------------------
Summary: ConcurrentModificationException on /tasktracker.jsp
Key: MAPREDUCE-5600
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5600
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: tasktracker
Environment: Found this in the MR1 bundled with
hadoop-2.0.0-mr1-cdh4.1.3 (which I think is based on some 0.20 version).
Reporter: Benoit Sigoure
If you request {{/tasktracker.jsp}} frequently on a TaskTracker that's busy,
every once in a while you'll get this:
{code}
2013-10-29 13:25:55,524 ERROR org.mortbay.log: /tasktracker.jsp
java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1117)
at java.util.TreeMap$EntryIterator.next(TreeMap.java:1153)
at java.util.TreeMap$EntryIterator.next(TreeMap.java:1148)
at
org.apache.hadoop.mapred.TaskTracker.getTasksFromRunningJobs(TaskTracker.java:3991)
at
org.apache.hadoop.mapred.tasktracker_jsp._jspService(tasktracker_jsp.java:98)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
at
org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:109)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at
org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:1056)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
{code}
--
This message was sent by Atlassian JIRA
(v6.1#6144)
