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Subject [GitHub] [hadoop] mukul1987 opened a new pull request #876: HDDS-1613. Opening of rocksDB in datanode fails with No locks available. Contributed by Mukul Kumar Singh.
Date Thu, 30 May 2019 19:21:37 GMT
mukul1987 opened a new pull request #876: HDDS-1613. Opening of rocksDB in datanode fails with
No locks available. Contributed by Mukul Kumar Singh.
URL: https://github.com/apache/hadoop/pull/876
 
 
   This problem occurs because in the current container cache, if an eviction is being requested
on an entry with a reference, the entry is removed from the map while reference is still held
onto the rocksdb. This reference also has acquired the lock as well.
   
   When another consumer tries to fetch the rockdb from the cache, it does not find the entry
and now tries to acquire the lock, this step will fail as the other reference is holding the
lock.

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