[ 
https://issues.apache.org/jira/browse/SOLR-5735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13903592#comment-13903592
 ] 

Mark Miller commented on SOLR-5735:
-----------------------------------

So I think this is related to the odd assertion errors we have been seeing 
lately - it's killing a recovery thread and so we timeout waiting to see 
recoveries finish. It lines up with a few things I've seen.

{noformat}
   [junit4]   2> 117985 T469 
ccr.RandomizedRunner$QueueUncaughtExceptionsHandler.uncaughtException WARNING 
Uncaught exception in thread: 
Thread[RecoveryThread,5,TGRP-ChaosMonkeySafeLeaderTest] 
java.lang.AssertionError: file _0_1.del does not exist
   [junit4]   2>        at 
__randomizedtesting.SeedInfo.seed([3D4A67BF7A1FDEC6]:0)
   [junit4]   2>        at 
org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4363)
   [junit4]   2>        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4429)
   [junit4]   2>        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2926)
   [junit4]   2>        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:3022)
   [junit4]   2>        at 
org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2989)
   [junit4]   2>        at 
org.apache.solr.update.DirectUpdateHandler2.commit(DirectUpdateHandler2.java:578)
   [junit4]   2>        at 
org.apache.solr.cloud.RecoveryStrategy.doRecovery(RecoveryStrategy.java:396)
   [junit4]   2>        at 
org.apache.solr.cloud.RecoveryStrategy.run(RecoveryStrategy.java:247)
{noformat}

> ChaosMonkey test timeouts.
> --------------------------
>
>                 Key: SOLR-5735
>                 URL: https://issues.apache.org/jira/browse/SOLR-5735
>             Project: Solr
>          Issue Type: Task
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>            Priority: Critical
>             Fix For: 4.7, 5.0
>
>
> This started showing up in jenkins runs a while back.



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