hmmm... I had seen some exceptions (don't remember which one) on MacOS. There
was missing JSR-223 engine on my machine.
Not sure why on Linux distribution you would see this error....
________________________________
From: Ted Yu <yuzhih...@gmail.com>
To: common-user@hadoop.apache.org
Sent: Wednesday, September 9, 2009 9:05:57 AM
Subject: Re: measuring memory usage
Linux vh20.dev.com 2.6.18-53.el5 #1 SMP Mon Nov 12 02:22:48 EST 2007
i686 i686 i386 GNU/Linux
/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0
On 9/8/09, Arvind Sharma <arvind...@yahoo.com> wrote:
> Which OS you are running the command ? Linux/MacOS/Windows ?
>
> Which JDK version ?
>
> Arvind
>
>
>
>
> ________________________________
> From: Ted Yu <t...@webroot.com>
> To: common-user@hadoop.apache.org
> Sent: Friday, September 4, 2009 11:57:44 AM
> Subject: measuring memory usage
>
> Hi,
>
> I am using Hadoop 0.20
>
>
>
> How can I get pass the exception below ?
>
>
>
> [had...@vh20 hadoop]$ jmap -heap 3837
>
> Attaching to process ID 3837, please wait...
>
> sun.jvm.hotspot.debugger.NoSuchSymbolException: Could not find symbol
> "gHotSpotVMTypeEntryTypeNameOffset" in any of the known library names
> (libjvm.so, libjvm_g.so, gamma_g)
>
> at
> sun.jvm.hotspot.HotSpotTypeDataBase.lookupInProcess(HotSpotTypeDataBase.
> java:388)
>
> at
> sun.jvm.hotspot.HotSpotTypeDataBase.getLongValueFromProcess(HotSpotTypeD
> ataBase.java:369)
>
> at
> sun.jvm.hotspot.HotSpotTypeDataBase.readVMTypes(HotSpotTypeDataBase.java
> :102)
>
> at
> sun.jvm.hotspot.HotSpotTypeDataBase.<init>(HotSpotTypeDataBase.java:85)
>
> at
> sun.jvm.hotspot.bugspot.BugSpotAgent.setupVM(BugSpotAgent.java:568)
>
> at
> sun.jvm.hotspot.bugspot.BugSpotAgent.go(BugSpotAgent.java:494)
>
> at
> sun.jvm.hotspot.bugspot.BugSpotAgent.attach(BugSpotAgent.java:332)
>
> at sun.jvm.hotspot.tools.Tool.start(Tool.java:163)
>
> at sun.jvm.hotspot.tools.HeapSummary.main(HeapSummary.java:39)
>
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
> a:57)
>
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:43)
>
> at java.lang.reflect.Method.invoke(Method.java:616)
>
> at sun.tools.jmap.JMap.runTool(JMap.java:196)
>
> at sun.tools.jmap.JMap.main(JMap.java:128)
>
> Debugger attached successfully.
>
> sun.jvm.hotspot.tools.HeapSummary requires a java VM process/core!
>
>
>
> Thanks
>
>
>
