hbase master log spam after region server crash and recovery

[#1]

After one of our region servers went down (down for about 30 minutes), we are getting quite a bit of this sort of spam in the hbase master log:

2016-12-05 21:20:30,036 WARN [PriorityRpcServer.handler=14,queue=0,port=16000] master.ServerManager: RegionServer <hostname>,16020,1472677155412 indicates a last flushed sequence id (8454457) that is less than the previous last flushed sequence id (8454459) for region metrics,AAAAAfUA54Mq0nkzloefXqeNG0Skrwr6^@^@^@^@XB�5,1480811500859.51b6b955b6638ffe2e60b562385a909b. Ignoring.

Is there a way to correct this? Should I be concerned?

[#2]

Seems similar to

https://issues.apache.org/jira/browse/HBASE-16994