Status: New
Owner: ----
Labels: Priority-Medium
New issue 124 by [email protected]: RoundRobinLoadBalancerElector is
not thread safe
http://code.google.com/p/jain-sip/issues/detail?id=124
What steps will reproduce the problem?
1. Configure JainSlee SIP-RA with two SIPLDB nodes, wheras one should be
unavailable
2. Send a reasonable Number of CPS to the system using any SIP Testservice
What is the expected output? What do you see instead?
1. Expected: All Calls should be routed to the active LDB
2. Real: Sporadically Calls are routed to the inactive LDB
What version of the product are you using? On what operating system?
2.7.0 JainSlee Release - which is using Jain-SIP-HA 1.3.0
Please provide any additional information below.
The issue was already posted in mobicents-public on 2013/08/06
Solution:
The selection of the unavailable LDB-Node can be tracked down to
RoundRobinLoadBalancerElector. Under a significant number of parallel
Threads getNextIndex() may repeatedly return one and the same unavailable
Node Index.
Attached RoundRobinAvailableLoadBalancerElector avoids this by checking
availablity already in getNextIndex() method.
RoundRobinLoadBalancerElectorTest (adoption of original Testclass from
jain-sip-jboss5 project) also attached.
It has to be decided if RoundRobinAvailableLoadBalancerElector will replace
RoundRobinLoadBalancerElector, or if it will exist as parallel
implementation (Elector-Implementation can be configured within SIP-RA
anyway)
Attachments:
RoundRobinLoadBalancerElectorTest.java 15.2 KB
RoundRobinAvailableLoadBalancerElector.java 3.1 KB
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