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https://issues.apache.org/jira/browse/SOLR-4260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13872666#comment-13872666
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Mark Miller commented on SOLR-4260:
-----------------------------------
Well the affects I was seeing related to having a control collection with a
core named collection1 and another collection called collection1. Over shard,
and that causes some similar looking effects.
I've addressed that and will see if ramping up my tests can spot anything - so
far cannot replicate in a test though.
> Inconsistent numDocs between leader and replica
> -----------------------------------------------
>
> Key: SOLR-4260
> URL: https://issues.apache.org/jira/browse/SOLR-4260
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Environment: 5.0.0.2013.01.04.15.31.51
> Reporter: Markus Jelsma
> Assignee: Mark Miller
> Priority: Critical
> Fix For: 5.0, 4.7
>
> Attachments: 192.168.20.102-replica1.png,
> 192.168.20.104-replica2.png, clusterstate.png,
> demo_shard1_replicas_out_of_sync.tgz
>
>
> After wiping all cores and reindexing some 3.3 million docs from Nutch using
> CloudSolrServer we see inconsistencies between the leader and replica for
> some shards.
> Each core hold about 3.3k documents. For some reason 5 out of 10 shards have
> a small deviation in then number of documents. The leader and slave deviate
> for roughly 10-20 documents, not more.
> Results hopping ranks in the result set for identical queries got my
> attention, there were small IDF differences for exactly the same record
> causing a record to shift positions in the result set. During those tests no
> records were indexed. Consecutive catch all queries also return different
> number of numDocs.
> We're running a 10 node test cluster with 10 shards and a replication factor
> of two and frequently reindex using a fresh build from trunk. I've not seen
> this issue for quite some time until a few days ago.
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