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From Fuud <>
Subject [GitHub] cassandra pull request #127: CASSANDRA-13652: Deadlock in AbstractCompaction...
Date Sat, 01 Jul 2017 12:59:00 GMT
GitHub user Fuud opened a pull request:

    CASSANDRA-13652: Deadlock in AbstractCompactionManager

    Change incorrect usage of LockSupport.park/unpark to Semaphore.
    Old implementation can deadlock because permit from unpark invocation can be consumed
by park inside logging framework and manager thread will be parked forever.

You can merge this pull request into a Git repository by running:

    $ git pull commitlog_deadlock

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #127
commit 175be27297e9933906a9261cd8d0af3a772bff24
Author: Fedor Bobin <>
Date:   2017-07-01T12:53:22Z

    CASSANDRA-13652: Deadlock in AbstractCompactionManager


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