[jira] [Created] (FLINK-10147) numBytesOut metric lagging behind

[Shang Yuanchun (Jira)]

Nico Kruber created FLINK-10147:
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             Summary: numBytesOut metric lagging behind
                 Key: FLINK-10147
                 URL: https://issues.apache.org/jira/browse/FLINK-10147
             Project: Flink
          Issue Type: Bug
          Components: Metrics, Network
    Affects Versions: 1.6.0, 1.5.2, 1.5.1, 1.5.0, 1.7.0
            Reporter: Nico Kruber


Since the low-latency changes in the network stack, {{numBytesOut}} is only updated whenever a new buffer is retrieved from the buffer pool. We do, however, keep the old buffer enqueued until all its bytes have been written. In low load scenarios this may thus seem like we do not send any bytes.



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