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https://issues.apache.org/jira/browse/BEAM-358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15340120#comment-15340120
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ASF GitHub Bot commented on BEAM-358:
-------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/incubator-beam/pull/497
> JAXB Coder is not thread safe
> -----------------------------
>
> Key: BEAM-358
> URL: https://issues.apache.org/jira/browse/BEAM-358
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Reporter: Thomas Groh
> Assignee: Thomas Groh
>
> Marshaller and Unmarshaller are cached for reuse in an instance variable.
> These objects are not thread safe
> (http://stackoverflow.com/questions/7400422/jaxb-creating-context-and-marshallers-cost),
> so they should be accessed in a single-threaded manner, either via use of a
> ThreadLocal or creating a new instance in calls to encode/decode.
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