GitHub user tony810430 opened a pull request:
https://github.com/apache/flink/pull/2925
[FLINK-4574] [kinesis]Strengthen fetch interval implementation in Kinesis
consumer
I used Timer to implement it.
If "flink.shard.getrecords.intervalmillis" is set by default value, which
is 0, the timer will schedule ShardConsumerFetcher once and run it forever.
If "flink.shard.getrecords.intervalmillis" is greater than 0, the timer
will schedule ShardConsumerFetcher at a fixed ratio by using
timer.scheduleAtFixedRate, which makes sure two consecutive function call would
be a fixed interval.
But if the getRecords took too much time and couldn't be finished on time,
ShardConsumerFetcher would log the warning and drop the next delayed task.
Ideally :
|----p1----|----p2----|----p3----|
|=====> |====> |====> |
task1 task2 task3
task2 is delayed by task1: task2 will be dropped
|----p1----|----p2----|----p3----|
|============> |====> |
task1 task3
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tony810430/flink FLINK-4574
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/2925.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 #2925
----
commit 44ef9b4df7e805a8f20b31ba55f511264820b7c1
Author: éåå² <[email protected]>
Date: 2016-12-02T09:15:28Z
[FLINK-4574] Strengthen fetch interval implementation in Kinesis consumer
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