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https://issues.apache.org/jira/browse/BEAM-8382?focusedWorklogId=331521&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-331521
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ASF GitHub Bot logged work on BEAM-8382:
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Author: ASF GitHub Bot
Created on: 21/Oct/19 17:17
Start Date: 21/Oct/19 17:17
Worklog Time Spent: 10m
Work Description: aromanenko-dev commented on issue #9765: [BEAM-8382]
Add polling interval to KinesisIO.Read
URL: https://github.com/apache/beam/pull/9765#issuecomment-544616617
@cmachgodaddy My understanding is the following. `KinesisSource.split()`
method is called on driver, before running a pipeline. So, it will create a
list of `KinesisSource`s for every split/partition (based on
`initialCheckpointGenerator`) that will be distributed on workers and run
there. Then every `KinesisSource` will create `KinesisReader` with own
`CheckpointGenerator` (on worker) and instantiate `ShardReadersPool` which will
create thread for every shard iterator (since every reader can read from more
than one shard). So, I don't see nested parallelism here. Though, it would be
great to test it in case if we have a bug there since this logic is quite
complicated.
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Issue Time Tracking
-------------------
Worklog Id: (was: 331521)
Time Spent: 3h 10m (was: 3h)
> Add polling interval to KinesisIO.Read
> --------------------------------------
>
> Key: BEAM-8382
> URL: https://issues.apache.org/jira/browse/BEAM-8382
> Project: Beam
> Issue Type: Improvement
> Components: io-java-kinesis
> Affects Versions: 2.13.0, 2.14.0, 2.15.0
> Reporter: Jonothan Farr
> Assignee: Jonothan Farr
> Priority: Major
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> With the current implementation we are observing Kinesis throttling due to
> ReadProvisionedThroughputExceeded on the order of hundreds of times per
> second, regardless of the actual Kinesis throughput. This is because the
> ShardReadersPool readLoop() method is polling getRecords() as fast as
> possible.
> From the KDS documentation:
> {quote}Each shard can support up to five read transactions per second.
> {quote}
> and
> {quote}For best results, sleep for at least 1 second (1,000 milliseconds)
> between calls to getRecords to avoid exceeding the limit on getRecords
> frequency.
> {quote}
> [https://docs.aws.amazon.com/streams/latest/dev/service-sizes-and-limits.html]
> [https://docs.aws.amazon.com/streams/latest/dev/developing-consumers-with-sdk.html]
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