tree 4e846bbce9eef89cabb4677cb8adef915405e1b9
parent f4a0c52bb7c8457e61857be349d0443e68d1f4fa
author Dale Emery <demery@vmware.com> 1608149057 -0800
committer GitHub <noreply@github.com> 1608149057 -0800
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GEODE-6622: WAN rolling upgrade test bind exception (#5854)

Before: Several WAN rolling upgrade tests allocated ports for two
locators by making two separate calls to AvailablePort. AvailablePort
randomly samples ports with replacement, and so two calls can return the
same port if the port is not put into use between the calls. From time
to time, a test would get the same port for both locators, and the second
would fail to start because its port was already in use.

Now: The tests allocate both ports at the same time, ensuring that the
two ports differ. And they get their ports from AvailablePortHelper,
which allocates ports round robin instead of sampling with replacement,
further reducing the chance of collisions.