[jira] [Created] (SOLR-13141) replicationFactor param cause problems with CDCR

["Krzysztof Watral (JIRA)" <ji...@apache.org>]

Krzysztof Watral created SOLR-13141:
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             Summary: replicationFactor param cause problems with CDCR
                 Key: SOLR-13141
                 URL: https://issues.apache.org/jira/browse/SOLR-13141
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
          Components: CDCR
    Affects Versions: 7.5, 7.6
         Environment: This is system independent problem - exists on windows and linux - reproduced by independent developers
            Reporter: Krzysztof Watral
         Attachments: type 1 - replication wasnt working at all.txt, type 2 - only few documents were being replicated.txt

i have encountered some problems with CDCR that are related to the value of {{replicationFactor}} param.

I ran the solr cloud on two datacenters with 2 nodes on each:
 * dca:
 ** dca_node_1
 ** dca_node_2
 * dcb
 ** dcb_node_1
 ** dcb_node_2

Then in sequence:
 * I configured the CDCR on copy of *_default* config set named *_default_cdcr*
 * I created collection on both DC from *_default_cdcr* config set with the following parameters:
 ** {{numShards}} = 2
 ** {{maxShardsPerNode}} = 2
 ** {{replicationFactor}} = 2
 * I disabled buffer on collection on both DC
 * I ran CDCR on both DC

CDCR has started without errors in logs. Then:
 * I stopped CDCR on both DC
 * I stopped all solr nodes
 * I restarted zookeepers on both DC
 * I started all solr nodes one by one
 * few minutes later I stared CDCR on both DC
 * CDCR has starded with 2 types of errors presented bellow (replication between DC is not working)
 ** 1st type - replication between DC wasn't working at all
 ** 2nd type - only few documents from 1000 has been replicated, restart didn't help (documents has not been synchronized)

{panel}
I've also discovered that problem appears only in case, when the {{replicationFactor}} parameter is higher than one
{panel}



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