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https://issues.apache.org/jira/browse/LUCENE-8505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16618363#comment-16618363
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Lucene/Solr QA commented on LUCENE-8505:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m 
 0s{color} | {color:green} The patch appears to include 1 new or modified test 
files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
24s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
19s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
19s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Release audit (RAT) {color} | 
{color:green}  0m 19s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Check forbidden APIs {color} | 
{color:green}  0m 19s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Validate source patterns {color} | 
{color:green}  0m 19s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 11m 
24s{color} | {color:green} core in the patch passed. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 13m 59s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | LUCENE-8505 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12939986/LUCENE-8505.patch |
| Optional Tests |  compile  javac  unit  ratsources  checkforbiddenapis  
validatesourcepatterns  |
| uname | Linux lucene1-us-west 4.4.0-130-generic #156~14.04.1-Ubuntu SMP Thu 
Jun 14 13:51:47 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | ant |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-LUCENE-Build/sourcedir/dev-tools/test-patch/lucene-solr-yetus-personality.sh
 |
| git revision | master / 7d0a778 |
| ant | version: Apache Ant(TM) version 1.9.3 compiled on July 24 2018 |
| Default Java | 1.8.0_172 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-LUCENE-Build/93/testReport/ |
| modules | C: lucene/core U: lucene/core |
| Console output | 
https://builds.apache.org/job/PreCommit-LUCENE-Build/93/console |
| Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |


This message was automatically generated.



> IndexWriter#addIndices should not sort indices if they are not already sorted
> -----------------------------------------------------------------------------
>
>                 Key: LUCENE-8505
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8505
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Jim Ferenczi
>            Priority: Minor
>         Attachments: LUCENE-8505.patch
>
>
> Today IndexWriter#addIndices silently re-sort non-sorted indices when they 
> are added in a sorted index. This is not safe because the sort is done 
> entirely in memory and cannot handle big segments efficiently. This leniency 
> was added because prior to 6.5, segments produced by flushes were not sorted, 
> they had to wait for a merge to apply the index sorting. Now that segments 
> are always sorted (LUCENE-7579) we should remove this ability and throw an 
> error if the sort of the current index does not match with the candidate.



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