johnyangk opened a new pull request #21: [NEMO-46] Make the operations on ExecutorRegistry atomic URL: https://github.com/apache/incubator-nemo/pull/21 JIRA: [NEMO-46: Make the operations on ExecutorRegistry atomic](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-46) **Major changes:** - Make ExecutorRegistry thread-safe - Create many failures in FaultToleranceTest#testTaskReexecutionForFailure, instead of a single failure **Minor changes to note:** - Track per-task attempts - Ignore all task state changes for previous task attempts, instead of only in `onTaskExecutionFailedRecoverable()`, to guard against transitions like READY(attempt 2)->COMPLETED(attempt 1) - Replace SCHEDULE_ATTEMPT_ON_CONTAINER_FAILURE = Integer.MAX_VALUE with a proper attempt index **Tests for the changes:** - FaultToleranceTest#testTaskReexecutionForFailure **Other comments:** - N/A resolves [NEMO-46](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-46)
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