ProgrammaticApiTest.testSharedTransport fails to receive correct number of messages

ProgrammaticApiTest tests the use of the API for creating and configuring channels. One such test testSharedTransport tests the creation and use of a stack with a shared transport. This test does the following:

• creates two channels A and B
• creates a UDP-based shared transport stack
• assigns the same stack to both channels
• channel A connects to group cluster-one; channel B connects to group cluster-two
• channel A multicasts 10 messages to its group; channel B multicasts 5 messages to its group
• the test then waits for the correct number of multicast messages to arrive

Problem:the test is failing because the receiver on channel A is receiving 20 messages instead of 10 messages.

This test fails intermittently, but fairly regularly.