Michael Ho 41426077fb IMPALA-9026: Use resolved IP address for statestore subscriber ...

This change adds a flag (--statestore_subscriber_use_resolved_address)
which, if set to true, allows statestore subscribers to use its
resolved IP address instead of its hostname as the heartbeat
address which statestore sends heartbeats / updates to.

This flag is useful in certain situation in which the subscriber's
DNS entry may not be present for a valid reason (e.g. a Kubernetes
pod whose readiness probe returns false). An example is that there
are multiple Impala coordinators but only one of them will be active
at a time (for admission control reason) and the rest will serve
as backup. In which case, we still want the backup coordinators to
receive updates from statestore but not serve any queries.

Change-Id: Ieb8302dec0e52beb9f0b88306a51c38ff42a63a2
Reviewed-on: http://gerrit.cloudera.org:8080/14388
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>

2019-10-29 23:11:47 +00:00

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