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https://issues.apache.org/jira/browse/FLINK-4020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15320388#comment-15320388
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ASF GitHub Bot commented on FLINK-4020:
---------------------------------------
GitHub user tzulitai opened a pull request:
https://github.com/apache/flink/pull/2081
[FLINK-4020][streaming-connectors] Move shard list querying to open() for
Kinesis consumer
Remove shard list querying from the constructor, and let all subtasks
independently discover which shards it should consume from in open(). This
change is a prerequisite for
[FLINK-3231](https://issues.apache.org/jira/browse/FLINK-3231).
Explanation for some changes that might seem irrelevant:
1. Changed naming of some variables / methods: Since the behaviour of shard
assignment to subtasks is now (and will continue to be in the future after
FLINK-3231) more like "discovering shards for consuming" instead of "being
assigned shards", I've changed the "assignedShards" related namings to
"discoveredShards".
2. I've removed some tests, due to the fact that the corresponding parts of
the code will be subject to quite a bit of change with the upcoming changes of
[FLINK-3231](https://issues.apache.org/jira/browse/FLINK-3231). Tests will be
added back with FLINK-3231.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tzulitai/flink FLINK-4020
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/2081.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 #2081
----
commit 1db426be73f572aec2041cb1a9da6ad49425f392
Author: Gordon Tai <[email protected]>
Date: 2016-06-08T10:46:02Z
[FLINK-4020] Move shard list querying to open() for Kinesis consumer
----
> Remove shard list querying from Kinesis consumer constructor
> ------------------------------------------------------------
>
> Key: FLINK-4020
> URL: https://issues.apache.org/jira/browse/FLINK-4020
> Project: Flink
> Issue Type: Sub-task
> Components: Streaming Connectors
> Reporter: Tzu-Li (Gordon) Tai
> Assignee: Tzu-Li (Gordon) Tai
>
> Currently FlinkKinesisConsumer is querying for the whole list of shards in
> the constructor, forcing the client to be able to access Kinesis as well.
> This is also a drawback for handling Kinesis-side resharding, since we'd want
> all shard listing / shard-to-task assigning / shard end (result of
> resharding) handling logic to be capable of being independently done within
> task life cycle methods, with defined and definite results.
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