[jira] [Commented] (SOLR-7572) hard commits with waitSearcher=true occasionally returns without waiting leading to inconsistent views of the index.

["Erick Erickson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-7572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14551097#comment-14551097 ] 

Erick Erickson commented on SOLR-7572:
--------------------------------------

Not entirely sure whether all there are related to firehosing updates at Solr or not, but they were all seen in the same environment.

> hard commits with waitSearcher=true occasionally returns without waiting leading to inconsistent views of the index.
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-7572
>                 URL: https://issues.apache.org/jira/browse/SOLR-7572
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 4.10.3
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>
> Another observed behavior while working with a customer, possibly related to SOLR-7571. Again, assigning to myself but feel free to take it.
> Issuing a commit (openSearcher=true) sometimes returns immediately and does not actually work as expected.
> Here's the process. 
> > Index a bunch of documents with timestamp=T1. Some time later update many (but not all) of those documents with a more recent timestamp=T2.
> > issue a hard commit waitSearcher=true
> > Issue a query ...fq=timestamp:[* TO T1]
> The return count includes many (all?) records with timestamp=T1. Simply waiting for "a while" and re-issuing the query will eventually return the correct number of docs.
> autocommits are disabled here, i.e. hard commits are happening with openSearcher=false and soft commits are disabled in solrconfig.xml. There are no other clients sending commit messages.
> Of course this is not reproducible at will and whether it's related to the client firehosing updates to Solr I don't know yet.
> To pursue this I'm hoping to set up a "firehose" test scenario and see how many of these I can reproduce.



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