Red Hat Bugzilla – Bug 620407
prefetch exceeds receiver capacity
Last modified: 2014-12-01 18:15:00 EST
+++ This bug was initially created as a clone of Bug #620402 +++
Description of problem:
The credit logic allows the number of prefetched messages to exceed the receiver capacity. This was first noticed due to an extremely intermittent failure in ReceiverTest.testCapacity. New capacity tests have been added that show this more frequently.
~1% with old testCapacity, and ~80-90% with new variants of testCapacity
Steps to Reproduce:
Run qpid-python-test *.testCapacity*
Test frequently fails.
Test should always pass.
This bug effectively disables flow control for the python client. This would be an extremely severe issue for anyone using it. The fix is already done.
To restate the impact for added clarity, anyone using the python client would not be able to effectively limit incoming messages.
Yes, the fix is already in the mrg release for RHEL 4 and 5. It would just be a matter of rebuilding the rpm on RHEL 6.
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.