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https://issues.apache.org/jira/browse/BEAM-14437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17550005#comment-17550005
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Danny McCormick commented on BEAM-14437:
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This issue has been migrated to https://github.com/apache/beam/issues/21575
> Raise Java Http KeepAlive Cache Size
> ------------------------------------
>
> Key: BEAM-14437
> URL: https://issues.apache.org/jira/browse/BEAM-14437
> Project: Beam
> Issue Type: Improvement
> Components: runner-dataflow
> Reporter: Arun Pandian
> Assignee: Arun Pandian
> Priority: P2
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Java HTTP[S]Connection's keep alive by default keeps 5 idle connections
> alive. Dataflow user workers could make 1000s of connection to the same
> endpoint. The HTTPS handshake overhead is significant in pipelines using
> BigQueryIO streaming inserts and bumping up the keep alive limit reduces it.
> The keep alive connection count can be changed by setting the JVM system
> property "http.maxConnections".
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