PortSockTest.poll_functionality_many_sockets failure on macOS CI testing

[0xdaryl]

Seen during CI testing of #5579 (which is RISC-V specific and could not possibly have caused this failure on macOS).

2020-09-25T21:46:03.5538530Z 31: [----------] 19 tests from PortSockTest
2020-09-25T21:46:04.5607610Z 31: /Users/runner/work/1/s/fvtest/porttest/omrsockTest.cpp:1307: Failure
2020-09-25T21:46:04.5608310Z 31:       Expected: rc
2020-09-25T21:46:04.5608610Z 31:       Which is: 1
2020-09-25T21:46:04.5608870Z 31: To be equal to: 2
2020-09-25T21:46:04.5609220Z 31: [  FAILED  ] PortSockTest.poll_functionality_many_sockets (1 ms)
2020-09-25T21:46:04.5610410Z 31: [----------] 19 tests from PortSockTest (1007 ms total)
2020-09-25T21:46:04.5610860Z 31: 
2020-09-25T21:46:04.5613070Z 31: [==========] 235 tests from 20 test cases ran. (76627 ms total)
2020-09-25T21:46:04.5614030Z 31: [  PASSED  ] 234 tests.
2020-09-25T21:46:04.5615540Z 31: [  FAILED  ] 1 test, listed below:
2020-09-25T21:46:04.5616500Z 31: [  FAILED  ] PortSockTest.poll_functionality_many_sockets
2020-09-25T21:46:04.5617010Z 31: 
2020-09-25T21:46:04.5617310Z 31:  1 FAILED TEST
2020-09-25T21:46:04.5617610Z 31:   YOU HAVE 3 DISABLED TESTS
2020-09-25T21:46:04.5617890Z 31: 
2020-09-25T21:46:04.5681450Z 31: Some textSome text
2020-09-25T21:46:04.5682400Z 35/45 Test #31: porttest ............................***Failed   76.64 sec

[andrewcraik]

See again testing #5605

[0xdaryl]

This test continues to fail intermittently during CI builds (probably at least once every day depending on how many CI builds are launched). I would say it is relatively easy to reproduce.

I'm wondering if any of @dnakamura @babsingh @tajila could take a look when they have a few spare cycles? Thanks.

[knn-k]

Issue #6516 looks similar to this.

[babsingh]

Issue #6516 looks similar to this.

Yes, closing this issue as a dup of #6516. #6516 has another failure, which is not reported here.