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https://issues.apache.org/jira/browse/BEAM-10706?focusedWorklogId=475845&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-475845
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ASF GitHub Bot logged work on BEAM-10706:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 28/Aug/20 14:51
Start Date: 28/Aug/20 14:51
Worklog Time Spent: 10m
Work Description: iemejia commented on pull request #12583:
URL: https://github.com/apache/beam/pull/12583#issuecomment-682654942
Hi thanks for your contribution(s), sorry if I have been slow with this (and
the other) reviews.
I have a minor question here. Is this because a limitation of AWS API level
at the batched request level only? Or is deduplication required at the whole
table level because if it is like that this fix won't make it, but including a
filter like this as a transform would make sense.
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Issue Time Tracking
-------------------
Worklog Id: (was: 475845)
Time Spent: 0.5h (was: 20m)
> 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
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> 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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