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https://issues.apache.org/jira/browse/HADOOP-8452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13286087#comment-13286087
]
Hadoop QA commented on HADOOP-8452:
-----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12530271/hadoop-8447-2.patch
against trunk revision .
+1 @author. The patch does not contain any @author tags.
-1 tests included. The patch doesn't appear to include any new or modified
tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 eclipse:eclipse. The patch built with eclipse:eclipse.
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed unit tests in
hadoop-common-project/hadoop-common.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/1060//testReport/
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/1060//console
This message is automatically generated.
> DN logs backtrace when running under jsvc and /jmx is loaded
> ------------------------------------------------------------
>
> Key: HADOOP-8452
> URL: https://issues.apache.org/jira/browse/HADOOP-8452
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.0.0-alpha
> Reporter: Andy Isaacson
> Assignee: Andy Isaacson
> Priority: Minor
> Attachments: 95db1fa.txt, hadoop-8447-2.patch, hadoop-8447-2.patch,
> hadoop-8447.patch
>
>
> Running the data node under jsvc and requesting /jmx falls victim to a kernel
> bug http://marc.info/?l=linux-kernel&m=133788505209725&w=2 which results in
> EACCES when open()ing /proc/self/fd to attempt to count the open
> filedescriptors.
> Hopefully someday we will have kernels with this bug fixed; in the meantime,
> the log spew which results is unpleasant:
> 12270 2012-05-15 21:04:41,683 ERROR org.apache.hadoop.jmx.JMXJsonServlet:
> getting attribute OpenFileDescriptorCount of java.lang:type=OperatingSystem
> threw an exception
> 12271 javax.management.RuntimeErrorException: java.lang.InternalError: errno:
> 13 error: Unable to open directory /proc/self/fd
> 12272
> 12273 at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBeanServerInterceptor.java:858)
> 12274 at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrowMaybeMBeanException(DefaultMBeanServerInterceptor.java:869)
> 12275 at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:670)
> 12276 at
> com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:638)
> 12277 at
> org.apache.hadoop.jmx.JMXJsonServlet.writeAttribute(JMXJsonServlet.java:314)
> 12278 at
> org.apache.hadoop.jmx.JMXJsonServlet.listBeans(JMXJsonServlet.java:292)
> 12279 at
> org.apache.hadoop.jmx.JMXJsonServlet.doGet(JMXJsonServlet.java:192)
> 12280 at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> 12281 at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> 12282 at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
> 12283 at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
> 12284 at
> org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:932)
> 12285 at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> 12286 at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
> 12287 at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> 12288 at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> 12289 at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
> 12290 at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
> 12291 at
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> 12292 at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> 12293 at org.mortbay.jetty.Server.handle(Server.java:326)
> 12294 at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> 12295 at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
> 12296 at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
> 12297 at
> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> 12298 at
> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> 12299 at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
> 12300 at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> 12301 Caused by: java.lang.InternalError: errno: 13 error: Unable to open
> directory /proc/self/fd
> 12302
> 12303 at
> com.sun.management.UnixOperatingSystem.getOpenFileDescriptorCount(Native
> Method)
> 12304 at sun.reflect.GeneratedMethodAccessor42.invoke(Unknown Source)
> 12305 at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 12306 at java.lang.reflect.Method.invoke(Method.java:597)
> 12307 at
> com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:167)
> 12308 at
> com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:96)
> 12309 at
> com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:33)
> 12310 at
> com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208)
> 12311 at
> com.sun.jmx.mbeanserver.PerInterface.getAttribute(PerInterface.java:65)
> 12312 at
> com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:216)
> 12313 at
> javax.management.StandardMBean.getAttribute(StandardMBean.java:358)
> 12314 at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:666)
> 12315 ... 25 more
> we should catch the RuntimeErrorException and make it a debug().
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