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https://issues.apache.org/jira/browse/KAFKA-4537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15748147#comment-15748147
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ASF GitHub Bot commented on KAFKA-4537:
---------------------------------------
GitHub user dguy opened a pull request:
https://github.com/apache/kafka/pull/2254
KAFKA-4537: StreamPartitionAssignor incorrectly adds standby partitions to
the partitionsByHostState map
If a KafkaStreams app is using Standby Tasks then `StreamPartitionAssignor`
will add the standby partitions to the partitionsByHostState map for each host.
This is incorrect as the partitionHostState map is used to resolve which host
is hosting a particular store for a key.
The result is that doing metadata lookups for interactive queries can
return an incorrect host
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dguy/kafka KAFKA-4537
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/2254.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2254
----
commit a29f74642cecb1722bbd785d42c2b0782d01c9d3
Author: Damian Guy <[email protected]>
Date: 2016-12-14T11:53:42Z
dont assign standby tasks to partitionsForHostState
----
> StreamPartitionAssignor incorrectly adds standby partitions to the
> partitionsByHostState map
> --------------------------------------------------------------------------------------------
>
> Key: KAFKA-4537
> URL: https://issues.apache.org/jira/browse/KAFKA-4537
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.10.2.0
> Reporter: Damian Guy
> Assignee: Damian Guy
> Fix For: 0.10.2.0
>
>
> If a KafkaStreams app is using Standby Tasks then StreamPartitionAssignor
> will add the standby partitions to the partitionsByHostState map for each
> host. This is incorrect as the partitionHostState map is used to resolve
> which host is hosting a particular store for a key.
> The result is that doing metadata lookups for interactive queries can return
> an incorrect host
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