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Posted to dev@lucene.apache.org by "Yonik Seeley (JIRA)" <ji...@apache.org> on 2016/08/22 14:38:20 UTC
[jira] [Reopened] (SOLR-9310) PeerSync fails on a node restart due
to IndexFingerPrint mismatch
[ https://issues.apache.org/jira/browse/SOLR-9310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yonik Seeley reopened SOLR-9310:
--------------------------------
Reopening... the cache that was added in SolrIndexSearcher is not thread safe and is checked outside synchronization.
Also, about this comment:
{code}
// TODO what happens if updates came out of order, would cached fingerprint still be valid?
// May be caching fingerprint may lead more problems
{code}
The index fingerprint only depends on what documents are in the index, not on their order in the index. And since the cache is on SolrIndexSearcher (which has a static view of the index), it will be impossible for fingerprint to change for a given max version. The comment should probably just be removed to avoid confusion.
> PeerSync fails on a node restart due to IndexFingerPrint mismatch
> -----------------------------------------------------------------
>
> Key: SOLR-9310
> URL: https://issues.apache.org/jira/browse/SOLR-9310
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Pushkar Raste
> Assignee: Noble Paul
> Fix For: trunk, 6.3
>
> Attachments: PeerSync_3Node_Setup.jpg, PeerSync_Experiment.patch, SOLR-9310.patch, SOLR-9310.patch, SOLR-9310.patch, SOLR-9310.patch, SOLR-9310.patch, SOLR-9310_3ReplicaTest.patch, SOLR-9310_final.patch
>
>
> I found that Peer Sync fails if a node restarts and documents were indexed while node was down. IndexFingerPrint check fails after recovering node applies updates.
> This happens only when node restarts and not if node just misses updates due reason other than it being down.
> Please check attached patch for the test.
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