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https://issues.apache.org/jira/browse/SOLR-6089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14105441#comment-14105441
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ASF subversion and git services commented on SOLR-6089:
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Commit 1619427 from [~markrmil...@gmail.com] in branch 'dev/trunk'
[ https://svn.apache.org/r1619427 ]
SOLR-6089: When using the HDFS block cache, when a file is deleted, it's
underlying data entries in the block cache are not removed, which is a problem
with the global block cache option.
> When using the HDFS block cache, when a file is deleted, it's underlying data
> entries in the block cache are not removed, which is a problem with the
> global block cache option.
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-6089
> URL: https://issues.apache.org/jira/browse/SOLR-6089
> Project: Solr
> Issue Type: Bug
> Components: hdfs
> Reporter: Mark Miller
> Assignee: Mark Miller
> Attachments: SOLR-6089.patch
>
>
> Patrick Hunt noticed this. Without the global block cache, the block cache
> was not reused after a directory was closed. Now that it is reused when using
> the global cache, leaving the underlying entries presents a problem if that
> directory is created again because blocks from the previous directory may be
> read. This could happen when you remove a solrcore and recreate it with the
> same data directory (or a collection with the same name). I could only
> reproduce it easily using index merges (core admin) with the sequence: merge
> index, delete collection, create collection, merge index. Reads on the final
> merged index can look corrupt or queries may just return no results.
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