Red Hat Bugzilla – Bug 538188
connection.start() hangs if connection is not accepted
Last modified: 2010-10-14 12:12:03 EDT
Can deadlock any python client or management tool. Run ./qpidd --maxConnections 2 Start more than 2 python client. For example start more than one qpid-tool or qpid-stat etc.. and it will hang. It should exit. Note that the broker prints the connection exceeded message and C++ for example exists correctly, python incorrectly hangs.
note is it Run ./qpidd --max-connections 2
The workaround is to specify a timeout to connection.start()
Fixed on trunk (r950472) and on release branch (http://mrg1.lab.bos.redhat.com/git/?p=qpid.git;a=commitdiff;h=9e7d9497b8665b51075ddcfd1d01d805f009f78b).
fixed validated on RHEL5.5/RHEL4 i386 / x86_64 packages: # rpm -qa | grep -E '(qpid|openais|rhm)' | sort -u openais-0.80.6-16.el5_5.7 openais-devel-0.80.6-16.el5_5.7 python-qpid-0.7.946106-14.el5 qpid-cpp-client-0.7.946106-15.el5 qpid-cpp-client-devel-0.7.946106-15.el5 qpid-cpp-client-devel-docs-0.7.946106-15.el5 qpid-cpp-client-ssl-0.7.946106-15.el5 qpid-cpp-mrg-debuginfo-0.7.946106-14.el5 qpid-cpp-server-0.7.946106-15.el5 qpid-cpp-server-cluster-0.7.946106-15.el5 qpid-cpp-server-devel-0.7.946106-15.el5 qpid-cpp-server-ssl-0.7.946106-15.el5 qpid-cpp-server-store-0.7.946106-15.el5 qpid-cpp-server-xml-0.7.946106-15.el5 qpid-java-client-0.7.946106-9.el5 qpid-java-common-0.7.946106-9.el5 qpid-tools-0.7.946106-10.el5 rhm-docs-0.7.946106-5.el5 rh-tests-distribution-MRG-Messaging-qpid_common-1.6-53 ->VERIFIED
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: After starting the qpidd daemon with a limit to the maximum number of connections, such as by specifying "--max Connections 2", running more than that number of the commands provided by the qpid-tools package, simultaneously, resulted in the last command becoming unresponsive.
Technical note updated. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. Diffed Contents: @@ -1 +1 @@ -After starting the qpidd daemon with a limit to the maximum number of connections, such as by specifying "--max Connections 2", running more than that number of the commands provided by the qpid-tools package, simultaneously, resulted in the last command becoming unresponsive.+After starting the qpidd daemon with a limit to the maximum number of connections, such as by specifying "--max Connections 2", running more than that number of the commands provided by the qpid-tools package, simultaneously, resulted in the last command becoming unresponsive. This has been fixed, and such command now exits as expected.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0773.html