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https://issues.apache.org/jira/browse/SOLR-13492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17069974#comment-17069974
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Lucene/Solr QA commented on SOLR-13492:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
|| || || || {color:brown} master Compile Tests {color} ||
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} Release audit (RAT) {color} | 
{color:green}  0m  2s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Validate source patterns {color} | 
{color:green}  0m  2s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Validate ref guide {color} | 
{color:green}  0m  2s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:black}{color} | {color:black} {color} | {color:black}  1m 23s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | SOLR-13492 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12998109/SOLR-13492.patch |
| Optional Tests |  validatesourcepatterns  ratsources  validaterefguide  |
| uname | Linux lucene1-us-west 4.15.0-54-generic #58-Ubuntu SMP Mon Jun 24 
10:55:24 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | ant |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-SOLR-Build/sourcedir/dev-tools/test-patch/lucene-solr-yetus-personality.sh
 |
| git revision | master / 9de68117067 |
| ant | version: Apache Ant(TM) version 1.10.5 compiled on March 28 2019 |
| modules | C: solr solr/solr-ref-guide U: solr |
| Console output | 
https://builds.apache.org/job/PreCommit-SOLR-Build/728/console |
| Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |


This message was automatically generated.



> Disallow explicit GC by default during Solr startup
> ---------------------------------------------------
>
>                 Key: SOLR-13492
>                 URL: https://issues.apache.org/jira/browse/SOLR-13492
>             Project: Solr
>          Issue Type: Improvement
>          Components: scripts and tools
>            Reporter: Shawn Heisey
>            Assignee: Shawn Heisey
>            Priority: Major
>         Attachments: SOLR-13492.patch
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Solr should use the -XX:+DisableExplicitGC option as part of its default GC 
> tuning.
> None of Solr's stock code uses explicit GCs, so that option will have no 
> effect on most installs.  The effective result of this is that if somebody 
> adds custom code to Solr and THAT code does an explicit GC, it won't be 
> allowed to function.



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