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https://issues.apache.org/jira/browse/HBASE-8416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13641858#comment-13641858
]
Ron Buckley commented on HBASE-8416:
------------------------------------
We're good with the fix in hadoop common.
> Region Server Spinning on JMX requests
> --------------------------------------
>
> Key: HBASE-8416
> URL: https://issues.apache.org/jira/browse/HBASE-8416
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.94.4
> Reporter: Ron Buckley
> Priority: Critical
> Fix For: 0.98.0, 0.94.8, 0.95.2
>
>
> This morning one our region servers (we have 44) stopped responding to
> the '/jmx' request. (It's working for regular activity.) Additionally,
> the region server is now using all the CPU on the host, running all 8
> cores at 100%.
> A full jstack is at:
> http://pastebin.com/dGTmTEN7
> Right now, there are 37 threads stuck here:
> "38565532@qtp-228776471-196" prio=10 tid=0x00002aaacc4f2800 nid=0x7f57
> runnable [0x0000000054a48000]
> java.lang.Thread.State: RUNNABLE
> at java.util.HashMap.get(HashMap.java:303)
> at
> org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase.getAttribute(MetricsDynamicMBeanBase.java:137)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:666)
> at
> com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:638)
> at
> org.apache.hadoop.jmx.JMXJsonServlet.writeAttribute(JMXJsonServlet.java:315)
> at
> org.apache.hadoop.jmx.JMXJsonServlet.listBeans(JMXJsonServlet.java:293)
> at org.apache.hadoop.jmx.JMXJsonServlet.doGet(JMXJsonServlet.java:193)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
> at
> org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:109)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:1056)
> 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)
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