Anything in the master log?
-------- Original message --------
From: Scott <[email protected]>
Date: 08/21/2015 6:15 PM (GMT-05:00)
To: [email protected]
Subject: Accumulo Monitor NullPointerException
Hello,
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:
<pre>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)</pre>
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)
Thanks,
Scott
