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https://issues.apache.org/jira/browse/FLINK-14382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16954637#comment-16954637
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Piotr Nowojski commented on FLINK-14382:
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Thanks for the answer [~fly_in_gis], but unfortunately I still do not
understand the issue. As far as I understand it, the warning message you posted
is being logged even before JobManager/TaskManager are started up in
{{YarnClusterDescriptor#addPluginsFoldersToShipFiles}}. This code tries to
assemble jar files from both {{lib}} AND {{plugins}} directories, to upload
them to the TM/JM. At this stage presence of {{plugins}} directory is indeed
optional, as users might not be using any plugins.
> Wrong local FLINK_PLUGINS_DIR is set to flink-conf.yaml of jobmanager and
> taskmanager on Yarn
> ---------------------------------------------------------------------------------------------
>
> Key: FLINK-14382
> URL: https://issues.apache.org/jira/browse/FLINK-14382
> Project: Flink
> Issue Type: Bug
> Components: Deployment / YARN
> Affects Versions: 1.9.0, 1.10.0
> Reporter: Yang Wang
> Priority: Major
> Fix For: 1.10.0, 1.9.2
>
>
> If we do not set FLINK_PLUGINS_DIR in flink-conf.yaml, it will be set to
> [flink
> configuration|https://github.com/apache/flink/blob/9e6ff81e22d6f5f04abb50ca1aea84fd2542bf9d/flink-core/src/main/java/org/apache/flink/configuration/GlobalConfiguration.java#L158]
> according to the environment.
> In yarn mode, the local path will be set in flink-conf.yaml and used by
> jobmanager and taskmanager. We will find the warning log like below.
> {code:java}
> 2019-10-12 19:24:58,165 WARN org.apache.flink.core.plugin.PluginConfig
> - Environment variable [FLINK_PLUGINS_DIR] is set to
> [/Users/wangy/IdeaProjects/apache-flink/flink-dist/target/flink-1.10-SNAPSHOT-bin/flink-1.10-SNAPSHOT/plugins]
> but the directory doesn't exist
> {code}
> It was in introduced by FLINK-12143.
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