tree 0dca0352db46ec59153fec786e6c1a931c638a3e
parent 4ecd4560e76a6ac44f7e80f75f5e42dcad86dddf
author Joseph Koshakow <jkosh44@users.noreply.github.com> 1583549160 -0500
committer GitHub <noreply@github.com> 1583549160 -0500
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Use LeaderLatch to determine if oracle exists (#1088)

* Use LeaderLatch to determine if oracle exists

The old implementation of oracleExists checks to see if there are
more than 1 ZNodes under the ZookeeperPath.ORACLE_SERVER path. This
relies on the LeaderLatch implementation and uses a path given to
a Curator recipe, which is advised against by the Curator docs.
See https://cwiki.apache.org/confluence/display/CURATOR/TN7.

The new implementation utilizes LeaderLatch to count the number
of participants to see if there's more than 0.