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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (SOLR-3939) Solr Cloud recovery and leader election when unloading leader core
Date Fri, 19 Oct 2012 16:56:13 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480126#comment-13480126
] 

Yonik Seeley edited comment on SOLR-3939 at 10/19/12 4:54 PM:
--------------------------------------------------------------

bq. for case one, I'd like to still sync if possible

Case #1 only had a single active replica up, so there's no one to sync with (or you mean try
to sync with even shards marked as down?)


                
      was (Author: yseeley@gmail.com):
    bq. for case one, I'd like to still sync if possible

Case #1 only had a single active shard up, so there's no one to sync with (or you mean try
to sync with even shards marked as down?)


                  
> Solr Cloud recovery and leader election when unloading leader core
> ------------------------------------------------------------------
>
>                 Key: SOLR-3939
>                 URL: https://issues.apache.org/jira/browse/SOLR-3939
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>    Affects Versions: 4.0-BETA, 4.0
>            Reporter: Joel Bernstein
>            Assignee: Mark Miller
>            Priority: Critical
>              Labels: 4.0.1_Candidate
>             Fix For: 4.1, 5.0
>
>         Attachments: cloud2.log, cloud.log, SOLR-3939.patch, SOLR-3939.patch
>
>
> When a leader core is unloaded using the core admin api, the followers in the shard go
into recovery but do not come out. Leader election doesn't take place and the shard goes down.
> This effects the ability to move a micro-shard from one Solr instance to another Solr
instance.
> The problem does not occur 100% of the time but a large % of the time. 
> To setup a test, startup Solr Cloud with a single shard. Add cores to that shard as replicas
using core admin. Then unload the leader core using core admin. 

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