GitHub user GJL opened a pull request: https://github.com/apache/flink/pull/6418
[FLINK-9939][runtime] Mesos: Not setting TMP dirs causes NPE ## What is the purpose of the change *This fixes a possible NPE when deploying on Mesos.* ## Brief change log - *Add null check to `BootstrapTools.updateTmpDirectoriesInConfiguration(...)`, and add `@Nullable` annotation.* ## Verifying this change This change added tests and can be verified as follows: - *Added unit test to assert that `updateTmpDirectoriesInConfiguration` can handle `null` values.* - *Manually deployed on Mesos.* ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (yes / **no**) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**) - The serializers: (yes / **no** / don't know) - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (**yes** / no / don't know) - The S3 file system connector: (yes / **no** / don't know) ## Documentation - Does this pull request introduce a new feature? (yes / **no**) - If yes, how is the feature documented? (**not applicable** / docs / JavaDocs / not documented) You can merge this pull request into a Git repository by running: $ git pull https://github.com/GJL/flink FLINK-9939 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/flink/pull/6418.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #6418 ---- commit eb03ada77db7633d330be7847dbdf9ee801a9bee Author: gyao <gary@...> Date: 2018-07-25T10:23:20Z [hotfix][tests] Fix checkstyle violations in BootstrapToolsTest. commit 261d4d7423b9ca179ac0004625f51b7b71655d63 Author: gyao <gary@...> Date: 2018-07-25T11:57:34Z [FLINK-9939][runtime] Add null check before setting tmp dirs in config. ---- ---