tanvipenumudy opened a new pull request #3180:
URL: https://github.com/apache/ozone/pull/3180


   ## What changes were proposed in this pull request?
   
   To provide useful information by exposing read lock waiting and held time 
metrics and log messages to understand OzoneManagerLock timestamp such as:
   
   `longestReadLockWaitingTime`: longest time (ms) a read lock was waiting 
since the last measurement
   `longestReadLockHeldTime`: longest time (ms) a read lock was held since the 
last measurement
   `numReadLockLongWaiting`: number of times the read lock has been waiting 
longer than the default threshold configuration
   `numReadLockLongHeld`: number of times the read lock has been held longer 
than the default threshold configuration
   
   ## What is the link to the Apache JIRA
   
   https://issues.apache.org/jira/browse/HDDS-6435
   
   ## How was this patch tested?
   
   Added JUnit tests.
   


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