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From "Jason Harvey (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-4492) Large HintsColumnFamily compactions hang
Date Sun, 05 Aug 2012 04:14:02 GMT
Jason Harvey created CASSANDRA-4492:

             Summary: Large HintsColumnFamily compactions hang
                 Key: CASSANDRA-4492
             Project: Cassandra
          Issue Type: Bug
    Affects Versions: 1.0.11
            Reporter: Jason Harvey
            Priority: Minor

Running into an issue on a 6 nodes 1.0.11 ring where whenever a somewhat large set of hints
build up (seen as low as 400MB), compaction on the hints CF hangs indefinitely. Nothing of
note in the logs. In some cases, the compaction hangs before a tmp sstable is even created.

I've wiped out every hints sstable I have and restarted several times. The issue always comes
back rather quickly and predictably after wiping the sstables. Compaction always seems to
succeed if the hints CFs are rather small.

Hints are enabled, and my hint window is the default of 1hr. I do have some copies of HintsColumnFamily
sstables that do replicate this issue. However, the hints may contain confidential data. If
they'd be helpful in troubleshooting this issue, let me know and see about sending them directly.

This ring was upgraded from 1.0.7. I didn't keep any hints from the upgrade.

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