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Posted to issues@beam.apache.org by "Alexey Romanenko (Jira)" <ji...@apache.org> on 2020/08/14 15:52:00 UTC
[jira] [Assigned] (BEAM-10706) DynamoDBIO fail to write to the same
key in short consecution
[ https://issues.apache.org/jira/browse/BEAM-10706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alexey Romanenko reassigned BEAM-10706:
---------------------------------------
Assignee: Dennis Yung
> DynamoDBIO fail to write to the same key in short consecution
> -------------------------------------------------------------
>
> Key: BEAM-10706
> URL: https://issues.apache.org/jira/browse/BEAM-10706
> Project: Beam
> Issue Type: Bug
> Components: io-java-aws
> Affects Versions: 2.23.0
> Reporter: Dennis Yung
> Assignee: Dennis Yung
> Priority: P2
>
> Internally, DynamoDBIO.Write uses the batchWriteItem method from the AWS SDK to sink items. However, there is a limitation in the AWS SDK that a call to batchWriteItem cannot contain duplicate keys.
> Currently DynamoDBIO.Write performs no key deduplication before flushing a batch, which could cause ValidationException: Provided list of item keys contains duplicates, if consecutive updates to a single key is within the batch size (currently hardcoded to be 25).
> To fix this bug, the batch of write requests need to be deduplicated before being sent to batchRequest.addRequestItemsEntry
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