[jira] [Created] (CASSANDRA-5691) Remove SimpleCondition

["Mikhail Mazursky (JIRA)" <ji...@apache.org>]

Mikhail Mazursky created CASSANDRA-5691:
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             Summary: Remove SimpleCondition
                 Key: CASSANDRA-5691
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5691
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Mikhail Mazursky
            Priority: Minor


Problematic scenario:
1. two threads get blocked in SimpleCondition.await();
2. some thread calls SimpleCondition.signal();
3. one of blocked threads wakes up and runs;
4. spurious wakeup happens in the second thread and it wakes up too and runs even though nobody signaled it.

Thus this is a broken implementation of Condition interface.

Anyway, looking at how code uses it, SimpleCondition can just be replaced with CountDownLatch.

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