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[jira] [Created] (FLINK-9878) IO worker threads BLOCKED on SSL Session Cache while CMS full gc


Nico Kruber created FLINK-9878:
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             Summary: IO worker threads BLOCKED on SSL Session Cache while CMS full gc
                 Key: FLINK-9878
                 URL: https://issues.apache.org/jira/browse/FLINK-9878
             Project: Flink
          Issue Type: Bug
          Components: Network
    Affects Versions: 1.5.1, 1.5.0, 1.6.0
            Reporter: Nico Kruber
            Assignee: Nico Kruber
             Fix For: 1.5.2, 1.6.0


According to https://github.com/netty/netty/issues/832, there is a JDK issue during garbage collection when the SSL session cache is not limited. We should allow the user to configure this and further (advanced) SSL parameters for fine-tuning to fix this and similar issues. In particular, the following parameters should be configurable:
- SSL session cache size
- SSL session timeout
- SSL handshake timeout
- SSL close notify flush timeout





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