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https://issues.apache.org/jira/browse/HADOOP-9456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13627900#comment-13627900
]
Weiming Shi commented on HADOOP-9456:
-------------------------------------
Hi Chandrashekhar, i use hadoop for my own study. I am also an outsider as
regard to how people usually fix the jira. But I think the way to reproduce the
error is to simply run a wordcount example with the installed hadoop
distribution in a true cluster mode.
Thanks
> Task logs are not generated for successful tasks
> ------------------------------------------------
>
> Key: HADOOP-9456
> URL: https://issues.apache.org/jira/browse/HADOOP-9456
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 1.1.2
> Environment: 4-node linux cluster running Redhat 6.3 and Hadoop
> 1.1.2.21 (from a old tarball of Hortonworks)
> Reporter: Weiming Shi
> Priority: Minor
>
> When i checked about the task logs of a complete job in the Web UI, i found
> that some of the tasks logs showed up "java.lang.NoClassDefFoundError:
> org/apache/hadoop/mapred/TaskLog$Reader". Checking about the log of the job
> tracker confirms that those tasks have completed successfully while checking
> about the log directory of that job reveals that logs of some successful
> tasks are not generated.
> Detailed log showed in the Web UI is attached below:
> ==============================================================================
> HTTP ERROR 500
> Problem accessing /tasklog. Reason:
> org/apache/hadoop/mapred/TaskLog$Reader
> Caused by:
> java.lang.NoClassDefFoundError: org/apache/hadoop/mapred/TaskLog$Reader
> at java.lang.Class.getDeclaredConstructors0(Native Method)
> at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
> at java.lang.Class.getConstructor0(Class.java:2699)
> at java.lang.Class.newInstance0(Class.java:326)
> at java.lang.Class.newInstance(Class.java:308)
> at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
> at
> org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:428)
> at
> org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
> at
> org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:881)
> at
> org.mortbay.jetty.servlet.ServletHandler$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)
> Caused by: java.lang.ClassNotFoundException:
> org.apache.hadoop.mapred.TaskLog$Reader
> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> ... 27 more
> Caused by:
> java.lang.ClassNotFoundException: org.apache.hadoop.mapred.TaskLog$Reader
> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> at java.lang.Class.getDeclaredConstructors0(Native Method)
> at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
> at java.lang.Class.getConstructor0(Class.java:2699)
> at java.lang.Class.newInstance0(Class.java:326)
> at java.lang.Class.newInstance(Class.java:308)
> at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
> at
> org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:428)
> at
> org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
> at
> org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:881)
> 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)
> Powered by Jetty://
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