walterddr opened a new pull request #11586: [FLINK-5552][runtime] make JMXServer static per JVM URL: https://github.com/apache/flink/pull/11586 ## What is the purpose of the change This is the first step to allow JMXServer information being returned via REST API. ## Brief change log - Moved JMXServer from JMXReporter private class into flink-runtime. - Added new configuration option `jmx.server.port` to allow configuration of the jmx server. - Launch JMXServer at start of each JMV entry (ClusterEntrypoint & TaskManagerRunner) ## Verifying this change This change is already covered by existing tests, such as - flink-runtime/tests - flink-metrics-reporter-jmx/tests/ This change added tests and can be verified as follows: - JMXReporterTests checks that there's only one singleton JMXServer being created across multiple JMXReporter. ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): no - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: yes - The serializers: no - The runtime per-record code paths (performance sensitive): no - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: no - The S3 file system connector: no ## Documentation - Does this pull request introduce a new feature? yes - If yes, how is the feature documented? docs
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