Andrey Kuznetsov created IGNITE-6043:

             Summary: Fix GridCacheSemaphoreImpl methods semantics
                 Key: IGNITE-6043
             Project: Ignite
          Issue Type: Bug
          Components: data structures
    Affects Versions: 2.1
            Reporter: Andrey Kuznetsov
            Priority: Critical

Current semaphore implementation, {{GridCacheSemaphoreImpl}}, has inverted 
method semantics: {{acquire()}} releases the permit and {{release()}} acquires 
it. Also, debug-level method {{availablePermits()}} returns permits acquired so 
far. This confusing behaviour should be fixed.

Also, it's worth noting in IgniteSemaphore's javadoc it's unbounded nature, as 
opposed to {{java.util.concurrent.Semaphore}}.

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