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Posted to dev@lucene.apache.org by "Mark Miller (JIRA)" <ji...@apache.org> on 2014/08/21 17:15:12 UTC
[jira] [Resolved] (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.
[ https://issues.apache.org/jira/browse/SOLR-6089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mark Miller resolved SOLR-6089.
-------------------------------
Resolution: Fixed
Fix Version/s: 4.10
5.0
> 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
> Fix For: 5.0, 4.10
>
> 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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