GitHub user zsxwing opened a pull request: https://github.com/apache/spark/pull/9198
[SPARK-11232][Core]Use 'offer' instead of 'put' to make sure calling send won't be interrupted The current `NettyRpcEndpointRef.send` can be interrupted because it uses `LinkedBlockingQueue.put`, which may hang the application. Image the following execution order: | thread 1: TaskRunner.kill | thread 2: TaskRunner.run ------------- | ------------- | ------------- 1 | killed = true | 2 | | if (killed) { 3 | | throw new TaskKilledException 4 | | case _: TaskKilledException _: InterruptedException if task.killed => 5 | task.kill(interruptThread): interruptThread is true | 6 | | execBackend.statusUpdate(taskId, TaskState.KILLED, ser.serialize(TaskKilled)) 7 | | localEndpoint.send(StatusUpdate(taskId, state, serializedData)): in LocalBackend Then `localEndpoint.send(StatusUpdate(taskId, state, serializedData))` will throw `InterruptedException`. This will prevent the executor from updating the task status and hang the application. An failure caused by the above issue here: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/44062/consoleFull Since `receivers` is an unbounded `LinkedBlockingQueue`, we can just use `LinkedBlockingQueue.offer` to resolve this issue. You can merge this pull request into a Git repository by running: $ git pull https://github.com/zsxwing/spark dont-interrupt-send Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/9198.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 #9198 ---- commit 8bf957e4b5772e86631deb57915449e18bed08f0 Author: zsxwing <zsxw...@gmail.com> Date: 2015-10-21T16:30:18Z Use 'offer' instead of 'put' to make sure calling send won't be interrupted ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org