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https://issues.apache.org/jira/browse/SOLR-9639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15575084#comment-15575084
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ASF subversion and git services commented on SOLR-9639:
-------------------------------------------------------

Commit 47446733884e030feaecac355c01c58f9e5e3169 in lucene-solr's branch 
refs/heads/master from [~mkhludnev]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=4744673 ]

SOLR-9639: CDCR Tests only fix. Wait until recovery is over before
remove the tmp_colletion.

> CdcrVersionReplicationTest failure
> ----------------------------------
>
>                 Key: SOLR-9639
>                 URL: https://issues.apache.org/jira/browse/SOLR-9639
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Mikhail Khludnev
>             Fix For: 6.3
>
>         Attachments: CDcr failure.txt, SOLR-9639.patch, SOLR-9639.patch, 
> cdcr-stack.txt, cdcr-success.txt
>
>
> h3. it fails.
> The problem is [over 
> there|https://github.com/apache/lucene-solr/blob/master/solr/core/src/test/org/apache/solr/cloud/BaseCdcrDistributedZkTest.java#L597]
>  when it deletes that temporal collection (which is a tricky thing per se) 
> while it's still in recovery Solr Cloud went crazy: it closes the core, and 
> almost done it, but it can't be unloaded because PeerSync (remember, it's 
> recovering) open it ones, and it bloat logs with 
> bq.105902 INFO  (qtp3284815-656) [n:127.0.0.1:41440_ia%2Fd    ] 
> o.a.s.c.SolrCore Core collection1 is not yet closed, waiting 100 ms before 
> checking again.
> But then, something spawn too many request {{/get}}?? which deadlocks until 
> heap is exceeded and it dies. The fix is obvious, just to wait until 
> recoveries finishes, before removing tmp_collection. 
> Beside of this particular fix,is there any ideas about deadlock caused by 
> deleting recovering collection?  



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