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https://issues.apache.org/jira/browse/STORM-703?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Joseph Evans resolved STORM-703.
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Resolution: Fixed
Fix Version/s: 0.11.0
Thanks [~dkatten],
I merged this into master, and re numbered the version to be 0.11.0, as there
is already a 0.10.x branch. If you want this to go into 0.10.0 please let me
know and I will cherry-pick it in.
> 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
> Assignee: Dave Katten
> Fix For: 0.11.0
>
>
> 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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