[jira] [Commented] (SOLR-4260) Inconsistent numDocs between leader and replica

["Yago Riveiro (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-4260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13813827#comment-13813827 ] 

Yago Riveiro commented on SOLR-4260:
------------------------------------

Hi, I hit this bug with solr 4.5.1

replica 1:

lastModified:20 minutes ago
version:80616
numDocs:6072661
maxDoc:6072841
deletedDocs:180

replica 2 (leader)

lastModified:20 minutes ago
version:77595
numDocs:6072575
maxDoc:6072771
deletedDocs:196

I don't know when this happened, therefore I have no time frame to find in log valuable information on logs.

> 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
>    Affects Versions: 5.0
>         Environment: 5.0.0.2013.01.04.15.31.51
>            Reporter: Markus Jelsma
>            Priority: Critical
>             Fix For: 5.0
>
>
> 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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