TisonKun opened a new pull request #6998: [FLINK-10757] [tests] Avoid port conflicts in AbstractTaskManagerProc… URL: https://github.com/apache/flink/pull/6998 …essFailureRecoveryTest ## What is the purpose of the change Harden `AbstractTaskManagerProcessFailureRecoveryTest` by avoid port conflicts. The relative log is https://api.travis-ci.org/v3/job/449439623/log.txt and test fails on > Caused by: java.net.BindException: Address already in use thus start the cluster with rest port 0 to avoid possible port conflict. ## Verifying this change This change is a trivial rework and it itself is a test. ## 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 `(Evolving)`: (**no**) - The serializers: (**no**) - The runtime per-record code paths (performance sensitive): (**no**) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (**no**) - The S3 file system connector: (**no**) ## Documentation - Does this pull request introduce a new feature? (**no**) - If yes, how is the feature documented? (**not applicable**) cc @zentol @tillrohrmann
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