RFR: 8231516: network QuickAckTest.java failed due to "SocketException: maximum number of DatagramSockets reached"

[Alan Bateman]

On 22/11/2019 16:35, Chris Hegarty wrote:
> :
> QuickAckTest only creates one DatagramSocket and one MulticastSocket, so
> just consumes two UDP socket resources. Prior tests run in the same VM
> must be consuming the majority of UDP socket resources ( and not
> releasing them), then this test just happens to be the unlucky one that
> hits the limit, right? So we may end up playing whack-a-mole on these
> tests for a while, as needed. Maybe all tests creating UDP sockets
> should be run in othervm? But that might be a bit unnecessary.
>
 From a quick check, there aren't a huge number of tests using these 
APIs so it might be possible to identify a few suspects. There are at 
least some tests that don't close when they fail so maybe there is a 
cascading impact. Another point is that some of the groups for tired 
testing may be running the jdk_net and jdk_nio tests in the same run, we 
might not see this with jdk_net runs.

-Alan