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From Satish Duggana <>
Subject Re: not all the servers in storm cluster processing messages
Date Thu, 09 Jun 2016 17:54:29 GMT
Hi Michael,
Kafka spout is given parallelism-hint as 1 and the topic has only one
partition. So, only one kafka spout task is run in one of the workers of
the topology. Are you asking that bolts connected directly/indirectly from
that kafka spout are all executed in the same worker as kafka spout? If so,
What are the groupings and parallellism-hint that you have configured on
those bolts?


On Thu, Jun 9, 2016 at 10:41 PM, Kazansky, Michael <> wrote:

> Hi All,
> We have 3 servers in storm cluster. To prevent the order of the messages
> which come to Kafka the Kafka partition was set to 1. KafkaSpout
> parallelism hint is set to 1 as well. When messages flow through the Storm
> we noticed that only one server in the cluster is busy processing messages
> other 2 are idle although the number of workers  is set to 3 in Config. Is
> it excepted behavior or something is missing?
> If it is expected behavior is there any way to have all 3 servers in the
> cluster processing messages?
> Storm version is 0.9.5
> Thanks,
> Michael Kazansky
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