[jira] [Created] (REEF-1654) Implement graceful shutdown of Wake executor services

["Sergiy Matusevych (JIRA)" <ji...@apache.org>]

Sergiy Matusevych created REEF-1654:
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             Summary: Implement graceful shutdown of Wake executor services
                 Key: REEF-1654
                 URL: https://issues.apache.org/jira/browse/REEF-1654
             Project: REEF
          Issue Type: Sub-task
          Components: REEF-Common, Wake
            Reporter: Sergiy Matusevych
            Assignee: Sergiy Matusevych


In many places in Wake and REEF, we do not make sure that executor services and related threads are being shut down properly. Instead, we assume that all threads that are still running after REEF job finishes will be shut down when we terminate the JVM. This is not acceptable in REEF Environment setting when REEF job has to run alongside with other applications, e.g. Spark. Therefore, we have to implement proper shutdown procedures for all thread pools maintained by Wake and REEF.



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