Dave Katten created STORM-703:
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Summary: RedisMapState with hash key can cause network overload
Key: STORM-703
URL: https://issues.apache.org/jira/browse/STORM-703
Project: Apache Storm
Issue Type: Bug
Components: external
Affects Versions: 0.10.0
Reporter: Dave Katten
When RedisMapState is constructed to use a hash key (and store values under a
hash in redis, rather than as key/value pairs in the top namespace), a multiGet
actually requests ALL of the state in that hash, instead of only the keys in
the batch.
As the size of the hash grows in redis, this becomes an inordinate amount of
traffic, and can cause interfaces to fall over.
* Solution
Instead of calling jedis.hgetall(hash), call jedis.hmget(hash, stringKeys[]).
Also, remove the buildValuesFromMap function, as it is no longer needed.
See PR#462 on github.
https://github.com/apache/storm/pull/462
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