Mongos seems to be shutting down with no details or errors . All we see in
the log is
Can't use connection pool during shutdown
2016-05-03T04:43:02.586+0000 I SHARDING [signalProcessingThread] dbexit:
1) What is not clear from this message is, is the app trying to get a
connection and Mongos can't serve it ?
2) Is Mongo unable to get connections from Config Server ? -- No
indication of errors or whatsoever in the logs ..
3) Is Mongos failing to get connections to Shard Servers ? --- There is
no such indication in any of the shard logs ..
Has anybody faced similar situation with Mongo Cluster ? We are going to
move the mongos to a multiple servers for redundancy, most likely deploy
Mongos on multiple app servers and load balance it. We would however like
to know what may be causing the shutdown.
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