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Posted to dev@ignite.apache.org by "Mo (JIRA)" <ji...@apache.org> on 2018/05/24 09:35:00 UTC

[jira] [Created] (IGNITE-8593) The semaphore's isBroken function doesn't work properly.

Mo created IGNITE-8593:
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             Summary: The semaphore's isBroken function doesn't work properly.
                 Key: IGNITE-8593
                 URL: https://issues.apache.org/jira/browse/IGNITE-8593
             Project: Ignite
          Issue Type: Bug
          Components: data structures
    Affects Versions: 2.4
            Reporter: Mo


Scenario: Three servers (s1,s2,s3) two clients (c1,c2).

A semaphore with one permit is created. 

Config: {{Release acquired permits if node, that owned them, left topology: set to false}}

 
 # c2 acquires the permit.
 # Network failure happens, isolating c2 from the rest of nodes for a period of time.
 # Network heals.
 # c2 releases the permit.
 # c2 acquires the permit.
 # Calling semaphore.isBroken() returns false on both c1 and c2.
 # c1 tries to acquire the permit but fails.
 # Now calling isBroken() returns true on both c1 and c2.

 

I think isBroken() should return true before a client tries to acquire a permit, and then fails (i.e., in step 6) rather than after acquiring a permit fails, as in the latter case, what purpose does the isBroken() function serves?



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