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https://issues.apache.org/jira/browse/ACCUMULO-3969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eric Newton resolved ACCUMULO-3969.
-----------------------------------
Resolution: Fixed
> 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
> Fix For: 1.8.0
>
>
> 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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