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  1. Accumulo
  2. ACCUMULO-3969

NPE in monitor

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 1.6.3
    • Fix Version/s: None
    • Component/s: monitor
    • Labels:
      None

      Description

      From the mailing list:

      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:

      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)
      

      The logs are recording the following error:

      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)
      

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              • Assignee:
                Unassigned
                Reporter:
                ecn Eric C. Newton

                Dates

                • Created:
                  Updated:
                  Resolved:

                  Issue deployment