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From "Yago Riveiro" <yago.rive...@gmail.com>
Subject Re: Recovering from Out of Mem
Date Tue, 14 Oct 2014 14:02:03 GMT
Boogie,




Any example for java_error.sh script?


—
/Yago Riveiro

On Tue, Oct 14, 2014 at 2:48 PM, Boogie Shafer <Boogie.Shafer@proquest.com>
wrote:

> a really simple approach is to have the OOM generate an email
> e.g. 
> 1) create a simple script (call it java_oom.sh) and drop it in your tomcat bin dir
> echo `date` | mail -s "Java Error: OutOfMemory - $HOSTNAME" notify@domain.com
> 2) configure your java options (in setenv.sh or similar) to trigger heap dump and the
email script when OOM occurs
> # config error behaviors
> CATALINA_OPTS="$CATALINA_OPTS -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=$TOMCAT_DIR/temp/tomcat-dump.hprof
-XX:OnError=$TOMCAT_DIR/bin/java_error.sh -XX:OnOutOfMemoryError=$TOMCAT_DIR/bin/java_oom.sh
-XX:ErrorFile=$TOMCAT_DIR/temp/java_error%p.log"
> ________________________________________
> From: Mark Miller <markrmiller@gmail.com>
> Sent: Tuesday, October 14, 2014 06:30
> To: solr-user@lucene.apache.org
> Subject: Re: Recovering from Out of Mem
> Best is to pass the Java cmd line option that kills the process on OOM and setup a supervisor
on the process to restart it.  You need a somewhat recent release for this to work properly
though.
> - Mark
>> On Oct 14, 2014, at 9:06 AM, Salman Akram <salman.akram@northbaysolutions.net>
wrote:
>>
>> I know there are some suggestions to avoid OOM issue e.g. setting
>> appropriate Max Heap size etc. However, what's the best way to recover from
>> it as it goes into non-responding state? We are using Tomcat on back end.
>>
>> The scenario is that once we face OOM issue it keeps on taking queries
>> (doesn't give any error) but they just time out. So even though we have a
>> fail over system implemented but we don't have a way to distinguish if
>> these are real time out queries OR due to OOM.
>>
>> --
>> Regards,
>>
>> Salman Akram
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