[jira] Commented: (SOLR-2326) Replication command indexversion fails to return index version

["Eric Pugh (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-2326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12985518#action_12985518 ] 

Eric Pugh commented on SOLR-2326:
---------------------------------

Mark, thanks for taking a look at this.   I've been dinking around with this bug, and I think it's because I am using the MERGE command to merge two indexes together.  When I do that, then I get the indexVersion 0.  After doing a merge, even after adding a new document and doing a commit it doesn't work.   I think it has to do with these lines from ReplicationHandler and a lack of a commitPoint:

      if (commitPoint != null && replicationEnabled.get()) {
        //
        // There is a race condition here.  The commit point may be changed / deleted by the time
        // we get around to reserving it.  This is a very small window though, and should not result
        // in a catastrophic failure, but will result in the client getting an empty file list for
        // the CMD_GET_FILE_LIST command.
        //
        core.getDeletionPolicy().setReserveDuration(commitPoint.getVersion(), reserveCommitDuration);
        rsp.add(CMD_INDEX_VERSION, commitPoint.getVersion());
        rsp.add(GENERATION, commitPoint.getGeneration());
      } else {
        // This happens when replication is not configured to happen after startup and no commit/optimize
        // has happened yet.
        rsp.add(CMD_INDEX_VERSION, 0L);
        rsp.add(GENERATION, 0L);
      }

> Replication command indexversion fails to return index version
> --------------------------------------------------------------
>
>                 Key: SOLR-2326
>                 URL: https://issues.apache.org/jira/browse/SOLR-2326
>             Project: Solr
>          Issue Type: Bug
>          Components: replication (java)
>         Environment: Branch 3x latest
>            Reporter: Eric Pugh
>            Assignee: Mark Miller
>             Fix For: 3.1
>
>
> To test this, I took the /example/multicore/core0 solrconfig and added a simple replication handler:
>   <requestHandler name="/replication" class="solr.ReplicationHandler" >
>       <lst name="master">
>         <str name="replicateAfter">commit</str>
>         <str name="replicateAfter">startup</str>
>         <str name="confFiles">schema.xml</str>
>       </lst>
>   </requestHandler>
> When I query the handler for details I get back the indexVersion that I expect: http://localhost:8983/solr/core0/replication?command=details&wt=json&indent=true
> But when I ask for just the indexVersion I get back a 0, which prevent the slaves from pulling updates: http://localhost:8983/solr/core0/replication?command=indexversion&wt=json&indent=true

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