[jira] [Created] (SOLR-4924) indices getting out of sync with SolrCloud

["Ricardo Merizalde (JIRA)" <ji...@apache.org>]

Ricardo Merizalde created SOLR-4924:
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             Summary: indices getting out of sync with SolrCloud
                 Key: SOLR-4924
                 URL: https://issues.apache.org/jira/browse/SOLR-4924
             Project: Solr
          Issue Type: Bug
          Components: replication (java), SolrCloud
    Affects Versions: 4.2
         Environment: Linux 2.6.18-308.16.1.el5 #1 SMP Tue Oct 2 22:01:43 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux

CentOS release 5.8 (Final)

Solr 4.2.1
            Reporter: Ricardo Merizalde


We are experiencing an issue in our production servers where the indices get out of sync. Customers will see different results/result sorting depending of the instance that serves the request.

We currently have 2 instances with a single shard. This is our update handler configuration

<updateHandler class="solr.DirectUpdateHandler2">
  <autoCommit>
    <!-- do a hard commit every 10 minutes -->
    <maxTime>600000</maxTime>
    <!-- or when there are more than 5000 pending documents -->
    <maxDocs>5000</maxDocs>
    <!-- save the changes to persistent storage but don't open a new search -->
    <openSearcher>false</openSearcher>
  </autoCommit>

  <autoSoftCommit>
    <!-- make changes visible every 5 seconds -->
    <maxTime>5000</maxTime>
  </autoSoftCommit>

  <updateLog>
    <str name="dir">${solr.data.dir:}</str>
  </updateLog>
</updateHandler>

When the indices get out of sync the follower replica ends up with a higher version than the master. Optimizing the leader or reloading the follower core doesn't not help. The only why to get the indices in sync is to restart the server.

This is an state example of the leader:

version: 1102541
numDocs: 214007
maxDoc: 370861
deletedDocs: 156854 

While the follower core has the following state:

version: 1109143
numDocs: 213890
maxDoc: 341585
deletedDocs: 127695 


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