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  1. Solr
  2. 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.

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 4.10, 6.0
    • Component/s: hdfs
    • Labels:
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      Description

      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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            • Assignee:
              markrmiller@gmail.com Mark Miller
              Reporter:
              markrmiller@gmail.com Mark Miller
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              • Created:
                Updated:
                Resolved: