Nhat Nguyen 3cc4e0dd09 Retry follow task when remote connection queue full (#55314)
If more than 100 shard-follow tasks are trying to connect to the remote 
cluster, then some of them will abort with "connect listener queue is 
full". This is because we retry on ESRejectedExecutionException, but not
on RejectedExecutionException.
2020-04-20 22:43:05 -04:00
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