[jira] [Created] (QPID-7505) [Java Client,0-10] The consumer credits might not be restored by the time when MessageConsumer#receive() returns in situations when there is no message prefetched locally and consumer is sending message.flush/flow as part of receive() to force delivery

["Alex Rudyy (JIRA)" <ji...@apache.org>]

Alex Rudyy created QPID-7505:
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             Summary: [Java Client,0-10] The consumer credits might not be restored by the time when MessageConsumer#receive() returns in situations when there is no message prefetched locally and consumer is sending message.flush/flow as part of receive() to force delivery
                 Key: QPID-7505
                 URL: https://issues.apache.org/jira/browse/QPID-7505
             Project: Qpid
          Issue Type: Bug
          Components: Java Client
    Affects Versions: qpid-java-6.0.5, qpid-java-6.0.4, qpid-java-6.0.3, qpid-java-6.0.2, qpid-java-6.0.1, qpid-java-6.0, 0.32, 0.30, 0.28, 0.26, 0.24, 0.22, 0.20, 0.18, qpid-java-6.1
            Reporter: Alex Rudyy
             Fix For: qpid-java-6.0.2


As part of changes made for QPID-1642 the functionality of BasicMessageConsumer_0_10#receive(long) was changed to force message delivery by sending message.flush when there is no message present locally in a consumer queue. The message.flush is followed by the message.flow to restore the credit as  message.flush forces the sender to exhaust his credit supply making it zero when message.flush command completes. However, no sync is sent after sending message flow. As result, in some cases the credit is not restored promptly impacting various messaging scenarios when message is published immediately after receive() is called but the published message is delivered to another consumer because credits are not restored on the consumer without messages



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