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Posted to dev@lucene.apache.org by "Erick Erickson (JIRA)" <ji...@apache.org> on 2018/01/17 20:46:00 UTC

[jira] [Commented] (SOLR-9168) Add availability to specify own oom handing script

    [ https://issues.apache.org/jira/browse/SOLR-9168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16329438#comment-16329438 ] 

Erick Erickson commented on SOLR-9168:
--------------------------------------

Waking this up after a while....

As of Java 8u92, there's a couple of new options:

- *ExitOnOutOfMemoryError*

- *CrashOnOutOfMemoryError*

See: [https://bugs.openjdk.java.net/browse/JDK-8152669]

What do people think about changing how this works? It would require requiring at least u92 for it all to work, but since we're up to 151 I don't think that's onerous. If it's an earlier version the option will just be ignored anyway. The proposal then becomes:

1> Enable ExitOnOutOfMemoryError by default

2> Go ahead and leave oom_solr.sh as the default file, just make it a placeholder (comment-only) file. People can add whatever they want in there as one option.

3> It's still a good idea to let the script used be specified (optionally) by an environment variable, for instance when I'm troubleshooting I could easily want to invoke different oom scripts on different runs.

4> Go ahead and add both options to foreground too.

If users go in and take out the ExitOnOutOfMemoryError they can, although we'll _strongly_ discourage that, Shawn's comment is well taken.

This hinges on our willingness to require 8u92, although this option would probably be ignored if run on earlier versions.

Opinions?

> Add availability to specify own oom handing script
> --------------------------------------------------
>
>                 Key: SOLR-9168
>                 URL: https://issues.apache.org/jira/browse/SOLR-9168
>             Project: Solr
>          Issue Type: Improvement
>          Components: scripts and tools
>    Affects Versions: 5.5.1
>            Reporter: AngryDeveloper
>            Priority: Major
>              Labels: oom
>             Fix For: 5.5.1
>
>         Attachments: 0001-SOLR-9168-Allow-users-to-specify-their-own-OnOutOfMe.patch, SOLR-9168-userdefined.patch, SOLR-9168.patch
>
>
> Right now the start script always uses $SOLR_TIP/bin/oom_solr.sh  to handle OutOfMemoryException. This script only kills instance of solr.
> We need to do some additional things (e.g sent mail about this exception)
> What do you think about adding possibility to set up own script?
> Proposition:
> {code}
> if [ -z "$SOLR_OOM_SCRIPT" ]; then
>   SOLR_OOM_SCRIPT=$SOLR_TIP/bin/oom_solr.sh 
> fi
> [...]
> nohup "$JAVA" "${SOLR_START_OPTS[@]}" $SOLR_ADDL_ARGS \
> 	"-XX:OnOutOfMemoryError=$SOLR_OOM_SCRIPT $SOLR_PORT $SOLR_LOGS_DIR" \
>         -jar start.jar "${SOLR_JETTY_CONFIG[@]}" \
> 	1>"$SOLR_LOGS_DIR/solr-$SOLR_PORT-console.log" 2>&1 & echo $! > "$SOLR_PID_DIR/solr-$SOLR_PORT.pid"
> {code}



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