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Posted to common-issues@hadoop.apache.org by "chandrashekhar Kotekar (JIRA)" <ji...@apache.org> on 2013/04/10 13:40:17 UTC
[jira] [Commented] (HADOOP-9456) Task logs are not generated for
successful tasks
[ https://issues.apache.org/jira/browse/HADOOP-9456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13627693#comment-13627693 ]
chandrashekhar Kotekar commented on HADOOP-9456:
------------------------------------------------
Hi,
I would like to solve this problem but as I am new in Hadoop development community, I do not how and where to start. I am not sure if this is the right place to ask this question.
Can you please give me some pointer regarding how do people usually solve problems in this community?
Generally when this kind of problem comes up, I ask for steps to re-produce this problem. How do things work in here?
Thanks,
Chandrashekhar
> 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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