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https://issues.apache.org/jira/browse/TEZ-4236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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László Bodor updated TEZ-4236:
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Summary: DAGClientServer is not really needed to be started/used in local
mode (was: Investigate if DAGAppMaster's DAGClientServer is really need to be
started/used in local mode)
> DAGClientServer is not really needed to be started/used in local mode
> ---------------------------------------------------------------------
>
> Key: TEZ-4236
> URL: https://issues.apache.org/jira/browse/TEZ-4236
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: László Bodor
> Assignee: László Bodor
> Priority: Major
> Attachments: TEZ-4236.01.patch, TEZ-4236.02.patch, TEZ-4236.03.patch,
> TEZ-4236.04.patch, TEZ-4236.05.patch
>
>
> For a customer, we found that they try to run hive on tez local mode tests,
> and due to strict firewall rules and security policy, the DagClientServer
> struggles to start or respond to connections (think about corporate laptops
> here). Instead of investigating the network-related workarounds, let's find
> another way and decide if DAGAppMaster really needs this server.
> LocalClient has an embedded
> [DAGAppMaster|https://github.com/apache/tez/blob/master/tez-dag/src/main/java/org/apache/tez/client/LocalClient.java#L65],
> so at the first sight, it doesn't make sense to rely on the network
> environment in terms of AM usage. Hopefully, AM can become more lightweight
> in the long term if we try to eliminate pointless network usage.
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