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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (ACCUMULO-3969) NPE in monitor
Date Mon, 24 Aug 2015 17:01:45 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-3969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Josh Elser resolved ACCUMULO-3969.
----------------------------------
    Resolution: Duplicate

> NPE in monitor
> --------------
>
>                 Key: ACCUMULO-3969
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3969
>             Project: Accumulo
>          Issue Type: Bug
>          Components: monitor
>    Affects Versions: 1.6.3
>            Reporter: Eric Newton
>
> From the mailing list:
> {quote}
>   We have Accumulo 1.6.3 set up on the HortonWorks install with a basic cluster of one
master and one tablet server. Initially everything seemed good but now I'm getting a NullPointerException
when I go to the monitor web page. The logs also keep adding a message to that effect as well.
I searched and couldn't find any posts with the same problem. I went back through all of the
config files and made sure they conform to the configuration instructions. I'm hoping someone
can point me to the right place to look for troubleshooting. 
> http://<machine-name>:50095 responds with a page that has the following:
> {noformat}
> java.lang.NullPointerException
> 	at org.apache.accumulo.monitor.Monitor.fetchData(Monitor.java:252)
> 	at org.apache.accumulo.monitor.servlets.BasicServlet.doGet(BasicServlet.java:59)
> 	at org.apache.accumulo.monitor.servlets.DefaultServlet.doGet(DefaultServlet.java:101)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
> 	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
> 	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503)
> 	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
> 	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
> 	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
> 	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
> 	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)
> 	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
> 	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
> 	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
> 	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
> 	at org.eclipse.jetty.server.Server.handle(Server.java:370)
> 	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
> 	at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
> 	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
> 	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
> 	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
> 	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
> 	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
> 	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
> 	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
> 	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
> 	at java.lang.Thread.run(Thread.java:745)
> {noformat}
> The logs are recording the following error:
> {noformat}
> 2015-08-21 16:37:21,152 [monitor.Monitor] WARN :
> java.lang.NullPointerException
>         at org.apache.accumulo.monitor.Monitor.fetchData(Monitor.java:252)
>         at org.apache.accumulo.monitor.Monitor$2.run(Monitor.java:508)
>         at org.apache.accumulo.core.util.LoggingRunnable.run(LoggingRunnable.java:34)
>         at java.lang.Thread.run(Thread.java:745)
> {noformat}
> {quote}



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