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Posted to issues@lucene.apache.org by "Kevin Risden (Jira)" <ji...@apache.org> on 2019/10/28 14:46:00 UTC
[jira] [Updated] (SOLR-11431) Leader candidate cannot become leader
if replica responds 500 to PeerSync
[ https://issues.apache.org/jira/browse/SOLR-11431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kevin Risden updated SOLR-11431:
--------------------------------
Status: Patch Available (was: Open)
> Leader candidate cannot become leader if replica responds 500 to PeerSync
> -------------------------------------------------------------------------
>
> Key: SOLR-11431
> URL: https://issues.apache.org/jira/browse/SOLR-11431
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 7.0
> Reporter: Mano Kovacs
> Priority: Major
> Attachments: SOLR-11431.patch
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> When leader candidate does PeerSync to all replicas, to download any missing updates, it is tolerant to failures. It uses {{cantReachIsSuccess=true}} switch which handles connection issue, 404 and 503 as success, since replicas being DOWN should not affect the process.
> However, if a replica has disk issues, the core initialization might fail and that results in {{500}} instead of {{503}}. I failing replica like that can prevent any other replicas becoming the leader.
> Proposing either:
> * Accepting {{500}} as "cant reach" so leader candidate can go on
> or
> * Changing {{SolrCoreInitializationException}} to return {{503}} instead of {{500}}
> * * this might be API change, however
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