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From "Cassandra Targett (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-11417) Crashed leader's hanging emphemral will make restarting followers stuck in recovering
Date Thu, 01 Feb 2018 18:01:00 GMT

     [ https://issues.apache.org/jira/browse/SOLR-11417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Cassandra Targett updated SOLR-11417:
-------------------------------------
    Component/s: SolrCloud

> Crashed leader's hanging emphemral will make restarting followers stuck in recovering
> -------------------------------------------------------------------------------------
>
>                 Key: SOLR-11417
>                 URL: https://issues.apache.org/jira/browse/SOLR-11417
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrCloud
>    Affects Versions: 6.3
>            Reporter: Mano Kovacs
>            Priority: Major
>         Attachments: SOLR-11417.png
>
>
> If replicas are starting up after leader crash and within the ZK session timeout, replicas
> * will lose leader election due to hanging ephemerals
> * will read stale data from ZK about current leader
> * will fail recovery and stuck in recovering state
> If leader is down permanently (eg. hardware failure) and all replicas are affected, shard
will not come up (see also SOLR-7065).
> Tested on 6.3. See attached image for details.



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