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Hongxi,<br>
<br>
I'm redirecting this message to the HotSpot GC OpenJDK alias<br>
and the Serviceability OpenJDK alias. JMX is owned by the<br>
Serviceability team and you've also got some GC questions<br>
here...<br>
<br>
Dan<br>
<br>
P.S.<br>
Bcc'ed the Runtime OpenJDK so you folks know that this message<br>
has been redirected...<br>
<div class="moz-cite-prefix"><br>
On 3/18/13 7:59 PM, 洪熙(hongxi) wrote:<br>
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cite="mid:18C57CA0D63174418D00CFAB14D96F6602C85C@CNHZ-EXMAIL-07.ali.com"
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<p class="MsoNormal"><span style="font-size:14.0pt" lang="EN-US">Hi
all</span><span style="font-size:14.0pt; font-family:宋体">：</span><span
style="font-size:14.0pt" lang="EN-US"></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt" lang="EN-US">
Sorry if here is not the right place to submit this small
fix.
</span></p>
<p class="MsoNormal"><span style="font-size:14.0pt" lang="EN-US"> </span></p>
<p class="MsoNormal"><span style="font-size:14.0pt" lang="EN-US">Days
ago, some of our systems occur this exception:</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">2013-01-22 16:59:07,351
ERROR protocol.MBeanServerMessageHandler {141} - handle
message error objectName=com.alibaba.dragoon:type=GC</span></p>
<p class="MsoNormal"><span lang="EN-US">javax.management.RuntimeErrorException:
java.lang.InternalError: Memory Pool not found</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBeanServerInterceptor.java:858)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrowMaybeMBeanException(DefaultMBeanServerInterceptor.java:869)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:670)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:638)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.alibaba.dragoon.common.protocol.MBeanServerMessageHandler.getAttributeInternal(MBeanServerMessageHandler.java:242)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.alibaba.dragoon.common.protocol.MBeanServerMessageHandler.handle(MBeanServerMessageHandler.java:113)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.alibaba.dragoon.common.protocol.MessageHandlerAdapter.handle(MessageHandlerAdapter.java:53)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.alibaba.dragoon.common.protocol.DragoonSession.receiveMessageIntenal(DragoonSession.java:204)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.alibaba.dragoon.common.protocol.DragoonSession.receiveMessage(DragoonSession.java:178)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.alibaba.dragoon.common.protocol.transport.socket.SocketSessionImpl$1.run(SocketSessionImpl.java:211)</span></p>
<p class="MsoNormal"><span lang="EN-US">Caused by:
java.lang.InternalError: Memory Pool not found</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
sun.management.MemoryPoolImpl.getUsage0(Native Method)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
sun.management.MemoryPoolImpl.getUsage(MemoryPoolImpl.java:77)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.alibaba.dragoon.client.jmx.GC.getEdenSpaceUsed(GC.java:185)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
java.lang.reflect.Method.invoke(Method.java:597)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:93)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:27)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.mbeanserver.PerInterface.getAttribute(PerInterface.java:65)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:216)</span></p>
<p class="MsoNormal"><span lang="EN-US"> at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:666)</span></p>
<p class="MsoNormal"><span lang="EN-US"> ... 7 more</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span style="font-size:14.0pt" lang="EN-US">The
jvm argument is as bellow</span><span
style="font-size:14.0pt; font-family:宋体">：</span><span
style="font-size:14.0pt" lang="EN-US"></span></p>
<p class="MsoNormal" style="text-align:left" align="left"><span
style="font-size:9.0pt;
font-family:"Helvetica","sans-serif";
color:black" lang="EN-US">/usr/java/bin/java -server -Xmx5g -Xms5g -Xmn512m -XX:PermSize=128m -Xss256k -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection</span></p>
<p class="MsoNormal" style="text-align:left" align="left"><span
style="font-size:9.0pt;
font-family:"Helvetica","sans-serif";
color:black" lang="EN-US"> -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 -XX:+UseCompressedOops -XX:ParallelGCThreads=4 -XX:+UseAdaptiveSizePolicy</span></p>
<p class="MsoNormal" style="text-align:left" align="left"><span
style="font-size:9.0pt;
font-family:"Helvetica","sans-serif";
color:black" lang="EN-US"> -Dcom.sun.management.jmxremote.port=1100 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Djava.rmi.server.hostname=localhost </span></p>
<p class="MsoNormal" style="text-align:left" align="left"><span
style="font-size:9.0pt;
font-family:"Helvetica","sans-serif";
color:black" lang="EN-US">-Dhummock.output.logs=/home/admin/output/logs -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true </span><span
style="font-size:9.0pt;
font-family:"Verdana","sans-serif";
color:black" lang="EN-US"></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span style="font-size:14.0pt" lang="EN-US">At
last, we found it’s possible a jvm bug, when
UseAdaptiveSizePolicy + ParNew, if the eden is expanded the
max size of eden’s ContiguousSpacePool will not be updated,
perhaps the commited is larger than max_size. Though at
last I know UseAdaptiveSizePolicy has some problems with CMS
and it has been disabled in the latest jdk7u, I think I
should submit a patch to fix this small bug. My patch is in
the attachment.</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span style="font-size:14.0pt" lang="EN-US">Regrads</span></p>
<p class="MsoNormal"><span style="font-size:14.0pt" lang="EN-US"> </span></p>
<p class="MsoNormal"><span style="font-size:14.0pt" lang="EN-US">hongxi</span></p>
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