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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