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https://issues.apache.org/jira/browse/BEAM-223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15658606#comment-15658606
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ASF GitHub Bot commented on BEAM-223:
-------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/incubator-beam/pull/1312
> KafkaIO: don't use SerializableCoder
> ------------------------------------
>
> Key: BEAM-223
> URL: https://issues.apache.org/jira/browse/BEAM-223
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-extensions
> Reporter: Daniel Halperin
> Assignee: Raghu Angadi
>
> Reuven says:
> {quote}
> I noticed that we're using SerializableCoder for the checkpoint mark in
> KafkaIO. This is generally highly discouraged in streaming pipelines.
> Partially because it's inefficient, but more importantly because Java
> serialization is not guaranteed to be stable. If a user updates their
> pipeline, the new pipeline may not be able to decode the existing checkpoint
> marks; this will either cause exceptions to be thrown, or data loss.
> {quote}
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