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https://issues.apache.org/jira/browse/FLINK-16789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17186002#comment-17186002
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Rong Rong commented on FLINK-16789:
-----------------------------------
After discussion in [#13163|https://github.com/apache/flink/pull/13163], we
decided to not support this feature. Although using port 0 is consider standard
in JVM for getting random port (see:
[https://docs.oracle.com/javase/7/docs/api/java/net/ServerSocket.html]) it is
also very convenient for users to just directly configure a large port range
after FLINK-5552 has been merged.
Closing this ticket as won't fix.
> Support JMX RMI random port assign & retrieval via JMXConnectorServer
> ---------------------------------------------------------------------
>
> Key: FLINK-16789
> URL: https://issues.apache.org/jira/browse/FLINK-16789
> Project: Flink
> Issue Type: New Feature
> Components: Runtime / Coordination, Runtime / Task
> Affects Versions: 1.11.0
> Reporter: Rong Rong
> Assignee: Rong Rong
> Priority: Major
> Labels: pull-request-available
>
> Currently there are no easy way to assign jmxrmi port to a running Flink job.
> The typical tutorial is to add the following to both TM and JM launch env:
> {code:java}
> -Dcom.sun.management.jmxremote
> -Dcom.sun.management.jmxremote.port=9999
> -Dcom.sun.management.jmxremote.local.only=false
> {code}
> However, setting the jmxremote port to 9999 is not usually a viable solution
> when Flink job is running on a shared environment (YARN / K8s / etc).
> setting *{{-Dcom.sun.management.jmxremote.port=0}}* is the best option
> however, there's no easy way to retrieve such port assignment. We proposed to
> use JMXConnectorServerFactory to explicitly establish a JMXServer inside
> *{{ClusterEntrypoint}}* & *{{TaskManagerRunner}}*.
> With the JMXServer explicitly created, we can return the JMXRMI information
> via either REST API or WebUI.
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