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https://issues.apache.org/jira/browse/SOLR-2565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042048#comment-13042048
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Robert Muir commented on SOLR-2565:
-----------------------------------
I merged the initial commit from SOLR-2279 (which enables MockDirectoryWrapper
for solr tests/tracking file handles)... no issues found from the branch.
I'm gonna look now at some other general ways we can beef up the test coverage
in Solr, especially by reusing what we have done in Lucene.
> Prevent IW#close and cut over to IW#commit
> ------------------------------------------
>
> Key: SOLR-2565
> URL: https://issues.apache.org/jira/browse/SOLR-2565
> Project: Solr
> Issue Type: Improvement
> Components: update
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Fix For: 4.0
>
>
> Spinnoff from SOLR-2193. We already have a branch to work on this issue here
> https://svn.apache.org/repos/asf/lucene/dev/branches/solr2193
> The main goal here is to prevent solr from closing the IW and use IW#commit
> instead. AFAIK the main issues here are:
> The update handler needs an overhaul.
> A few goals I think we might want to look at:
> 1. Expose the SolrIndexWriter in the api or add the proper abstractions to
> get done what we now do with special casing:
> 2. Stop closing the IndexWriter and start using commit (still lazy IW init
> though).
> 3. Drop iwAccess, iwCommit locks and sync mostly at the Lucene level.
> 4. Address the current issues we face because multiple original/'reloaded'
> cores can have a different IndexWriter on the same index.
> Eventually this is a preparation for NRT support in Solr which I will create
> a followup issue for.
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