[
https://issues.apache.org/jira/browse/HBASE-14707?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mike Drob resolved HBASE-14707.
-------------------------------
Resolution: Cannot Reproduce
Not seen in a while and not enough info to reproduce. The JVM used for the
original report seems to have stack trace optimization turned on, where it
discards the rest of the NPE after printing it the first few times. If this
comes up again, then we'll try to address it.
> NPE spew getting metrics via jmx
> --------------------------------
>
> Key: HBASE-14707
> URL: https://issues.apache.org/jira/browse/HBASE-14707
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Reporter: stack
> Priority: Major
>
> See this in branch-1 tip:
> {code}
> 2015-10-27 08:01:08,954 INFO [main-EventThread]
> replication.ReplicationTrackerZKImpl:
> /hbase/rs/e1101.halxg.cloudera.com,16020,1445958006576 znode expired,
> triggering replicatorRemoved event
> 2015-10-27 08:01:20,645 ERROR [685943200@qtp-893835279-134] util.JSONBean:
> getting attribute Value of
> "org.apache.hadoop.hbase.client":type="MetricsConnection",scope="hconnection-0x33abd9d3",name="executorPoolActiveThreads"
> threw an exception
> javax.management.RuntimeMBeanException: java.lang.NullPointerException
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBeanServerInterceptor.java:839)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrowMaybeMBeanException(DefaultMBeanServerInterceptor.java:852)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:651)
> at
> com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:678)
> at
> org.apache.hadoop.hbase.util.JSONBean.writeAttribute(JSONBean.java:235)
> at org.apache.hadoop.hbase.util.JSONBean.write(JSONBean.java:209)
> at org.apache.hadoop.hbase.util.JSONBean.access$000(JSONBean.java:53)
> at org.apache.hadoop.hbase.util.JSONBean$1.write(JSONBean.java:96)
> at
> org.apache.hadoop.hbase.http.jmx.JMXJsonServlet.doGet(JMXJsonServlet.java:202)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
> at
> org.apache.hadoop.hbase.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:113)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.apache.hadoop.hbase.http.ClickjackingPreventionFilter.doFilter(ClickjackingPreventionFilter.java:48)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.apache.hadoop.hbase.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:1354)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
> 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.NullPointerException
> {code}
> TSDB is trying to get metrics on a period
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