Jun Gong created YARN-3469:
Summary: Do not set watch for most cases in ZKRMStateStore
Project: Hadoop YARN
Issue Type: Improvement
Affects Versions: 2.6.0
Reporter: Jun Gong
Assignee: Jun Gong
In ZKRMStateStore, most operations(e.g. getDataWithRetries, getDataWithRetries,
getDataWithRetries) set watches on znode. Large watches will cause problem such
as [ZOOKEEPER-706: large numbers of watches can cause session re-establishment
Although there is a workaround that setting jute.maxbuffer to a larger value,
we need to adjust this value once there are more app and attempts stored in ZK.
And those watches are useless now. It might be better that do not set watches.
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