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https://issues.apache.org/jira/browse/SPARK-23785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16412042#comment-16412042
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Sahil Takiar commented on SPARK-23785:
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[~vanzin] opened a PR that just checks if {{isConnected}} is true before
writing to the connection, but not sure this will fix the issue from
HIVE-18533. Looking through the code it seems like this only gets set when the
{{LauncherBackend}} closes the connection, but doesn't detect when the
{{LauncherServer}} closes the connection. Unless, I'm missing something.
> LauncherBackend doesn't check state of connection before setting state
> ----------------------------------------------------------------------
>
> Key: SPARK-23785
> URL: https://issues.apache.org/jira/browse/SPARK-23785
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: Sahil Takiar
> Priority: Major
>
> Found in HIVE-18533 while trying to integration with the
> {{InProcessLauncher}}. {{LauncherBackend}} doesn't check the state of its
> connection to the {{LauncherServer}} before trying to run {{setState}} -
> which sends a {{SetState}} message on the connection.
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