There is an error log which can be seen frequently in the log:
2020-11-30 15:35:58,539 [CommandWatcher-LeaseManager#LeaseMonitor] ERROR lease.LeaseManager (LeaseManager.java:run(238)) - Execution was interrupted
java.lang.InterruptedException: sleep interrupted
at java.lang.Thread.sleep(Native Method)
This log is introduced by
HDDS-2561 to make Sonar happy, but it was not required as LeaseManager use the thread interrupt intentionally.
For a proper fix we can keep the logging on WARN level AND replace thread interrupts with thread notify/wait.