Alexey Goncharuk created IGNITE-5579:
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             Summary: Make sure identical binary metadata updates from the same 
node do not happen twice
                 Key: IGNITE-5579
                 URL: https://issues.apache.org/jira/browse/IGNITE-5579
             Project: Ignite
          Issue Type: Improvement
          Components: cache
    Affects Versions: 1.7
            Reporter: Alexey Goncharuk
             Fix For: 2.1


It is possible that multiple user threads attempt identical binary metadata 
update concurrently. In this case, a node will just increase contention on the 
cache key, but once the lock is acquired there will be nothing changed. On 
large topologies, this may lead to nodes waiting for the metadata update for 
hours (!).
We should work out a way to identify identical metadata updates and allow only 
one thread to proceed.



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