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https://issues.apache.org/jira/browse/SOLR-6162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14031512#comment-14031512
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Pieter commented on SOLR-6162:
------------------------------
That nrtMode parameter does the trick. Elaboration on how it got there is quite
short; when upgrading to 4.8 I diffed my solrconfig with the new one from the
examples and noticed this parameter. I interpreted the comment quoted above as
a hint to set it to true, since we run in master/slave setup. That means, for
most cores we have a master/slave setup. For a few we query directly on the
master and on those we had the issue.
I can't add anything to the discussion about removing the param. If it can be
removed cause it doesn't add anything (but confusion), I would vote for it.
Regardless that param, I do think that if a user makes the effort to do a
softcommit (or configure autosoftcommit), he'll do so because he wants the
update to be visible after the commit. Having an extra configuration switch to
confirm such behaviour is not intuitive I think.
> Softcommit does not open a new searcher after adding docs
> ---------------------------------------------------------
>
> Key: SOLR-6162
> URL: https://issues.apache.org/jira/browse/SOLR-6162
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.8
> Reporter: Pieter
> Attachments: KlwrDocAttrs.zip
>
>
> We just upgraded from 4.2 to 4.8.1 and now run into an issue where added
> documents are not visible after doing a soft commit. Seems to be introduced
> by SOLR-5783. The setup of the index is fairly simple; single core, no cloud,
> no replication, java program that adds a few rows, concludes with a
> softcommit, hardcommit is done via autoCommit few times an hour. Another
> (similar) index that uses autoSoftCommit instead of softcommitting via code
> has the same issue. Here is a snippet of the log:
> {code}
> 07:34:01.867 INFO [qtp1520582600-1445 ] :
> o.a.s.u.processor.LogUpdateProcessor - [PRD_KlwrDocAttrs] webapp=/solr
> path=/update params={wt=javabin&version=2}
> {add=[id-04114dd2-339e-4d2f-bb9f-539415799b1a (1470681570716155904),
> id-05eac67d-4f84-4c6f-b78f-714fe31eab40 (1470681570716155905),
> id-07559ff2-246c-4fde-9b97-0c5926348f62 (1470681570716155906),
> id-07cc0feb-b92d-41b8-9755-7677c9589af8 (1470681570716155907),
> id-11214665-9640-459d-804b-d9e3b069e8c2 (1470681570716155908),
> id-1147abeb-3dd5-4cda-b469-a99ebce913b4 (1470681570716155909),
> id-143f50b4-c195-480e-ab44-0ee4e7fbdc5c (1470681570716155910),
> id-14ad5b3e-1558-4bc6-a7a7-d2f03d1cd040 (1470681570717204480),
> id-168e810c-9a75-4e4f-84f4-946866cf0d26 (1470681570717204481),
> id-16de425b-0cd8-4bcd-98c1-6699c3de5112 (1470681570717204482), ... (87
> adds)]} 0 264
> 07:34:01.869 INFO [qtp1520582600-1445 ] :
> org.apache.solr.update.UpdateHandler - start
> commit{,optimize=false,openSearcher=true,waitSearcher=true,expungeDeletes=false,softCommit=true,prepareCommit=false}
> 07:34:01.872 INFO [qtp1520582600-1445 ] :
> org.apache.solr.core.SolrCore - SolrIndexSearcher has not changed
> - not re-opening: org.apache.solr.search.SolrIndexSearcher
> 07:34:01.872 INFO [qtp1520582600-1445 ] :
> org.apache.solr.update.UpdateHandler - end_commit_flush
> 07:34:01.873 INFO [qtp1520582600-1445 ] :
> o.a.s.u.processor.LogUpdateProcessor - [PRD_KlwrDocAttrs] webapp=/solr
> path=/update
> params={waitSearcher=true&commit=true&wt=javabin&version=2&softCommit=true}
> {commit=} 0 4
> 0
> {code}
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