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https://issues.apache.org/jira/browse/STORM-861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14580769#comment-14580769
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Derek Dagit commented on STORM-861:
-----------------------------------
It may be that there are not enough tasks defined in the topology, and so
increasing the parallelism may have no effect. (There are not any more tasks
to execute in the new threads that would be launched.)
> Rebalance REST API : "executors" in rebalanceOptions doesn't seem to be
> reflected while rebalancing
> ---------------------------------------------------------------------------------------------------
>
> Key: STORM-861
> URL: https://issues.apache.org/jira/browse/STORM-861
> Project: Apache Storm
> Issue Type: Bug
> Reporter: Jungtaek Lim
> Priority: Minor
>
> There's one topology in cluster, and it is storm.starter.RollingTopWords from
> storm-starter.
> https://github.com/apache/storm/blob/master/examples/storm-starter/src/jvm/storm/starter/RollingTopWords.java
> I just ran rebalance via REST API, and found something is not working
> properly.
> {noformat}
> curl -X POST -H "Content-Type: application/json" -d '{"rebalanceOptions":
> {"numWorkers": 2, "executors": {"wordGenerator": 10, "counter": 7,
> "intermediateRanker": 10}}}'
> http://localhost:8080/api/v1/topology/production-topology-4-1433927082/rebalance/50
> {noformat}
> It changes number of workers to 2, but it doesn't change any components'
> executor count.
> Sample of rebalance REST API from document is here.
> {noformat}
> curl -i -b ~/cookiejar.txt -c ~/cookiejar.txt -X POST
> -H "Content-Type: application/json"
> -d '{"rebalanceOptions": {"numWorkers": 2, "executors": { "spout" : "5",
> "split": 7, "count": 5 }}, "callback":"foo"}'
> http://localhost:8080/api/v1/topology/wordcount-1-1420308665/rebalance/0
> {noformat}
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