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https://issues.apache.org/jira/browse/CASSANDRA-12849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeremy Hanna updated CASSANDRA-12849:
-------------------------------------
    Complexity: Low Hanging Fruit

> The parameter  -XX:HeapDumpPath is not ovewritten by cassandra-env.sh
> ---------------------------------------------------------------------
>
>                 Key: CASSANDRA-12849
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12849
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Local/Config
>            Reporter: jean carlo rivera ura
>            Priority: Normal
>              Labels: lhf
>         Attachments: 12849-trunk.txt
>
>
> The parameter  -XX:HeapDumpPath appears twice in the java process 
> {panel}
> user@node:~$ sudo ps aux | grep --color  HeapDumpPath
> java -ea -javaagent:/usr/share/cassandra/lib/jamm-0.3.0.jar 
> -XX:+CMSClassUnloadingEnabled -XX:+UseThreadPriorities 
> -XX:ThreadPriorityPolicy=42 -Xms1024M -Xmx1024M -Xmn200M 
> -XX:+HeapDumpOnOutOfMemoryError 
> -XX:*HeapDumpPath*=/var/lib/cassandra-1477577769-pid1516.hprof -Xss256k 
> ...............................
> -XX:*HeapDumpPath*=/home/cassandra/java_1477577769.hprof 
> -XX:ErrorFile=/var/lib/cassandra/hs_err_1477577769.log 
> org.apache.cassandra.service.CassandraDaemon
> {panel}
> The problem is when we have an OOM error, the JVM dump goes to 
> */home/cassandra/java_1477577769.hprof * when the correct behavior is to go 
> to the path defined by cassandra-env.sh  
> */var/lib/cassandra-1477577769-pid1516.hprof*
> This is quite annoying because cassandra takes into account only the path 
> defined by the script init (usually that disk is not that big to keep 8Gb of 
> a heap dump) and not the path defined in cassandra-env.sh
> {noformat}
> user@node:~$ jmx4perl http://localhost:8523/jolokia read 
> com.sun.management:type=HotSpotDiagnostic DiagnosticOptions
>      {
>         name => 'HeapDumpPath',
>         origin => 'VM_CREATION',
>         value => '/home/cassandra/java_1477043835.hprof',
>         writeable => '[true]'
>       },
> {noformat}



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