2 test failures in Epoll in ppc64le docker container

[seth-priya]

Expected behavior

All unit tests should pass

Actual behavior

2 test failure in Netty/Transport/Native/Epoll inside UBI 8.4 container on ppc64le
[INFO]
[ERROR] Failures:
[ERROR] EpollDatagramUnicastTest.testSendAndReceiveSegmentedDatagramPacketComposite:101->AbstractComboTestsuiteTest.run:52->testSendAndReceiveSegmentedDatagramPacketComposite:110->testSegmentedDatagramPacket:158 expected: but was:
[ERROR] EpollDatagramUnicastTest.testSendAndReceiveSegmentedDatagramPacket:87->AbstractComboTestsuiteTest.run:52->testSendAndReceiveSegmentedDatagramPacket:96->testSegmentedDatagramPacket:158 expected: but was:
[INFO]
[ERROR] Tests run: 753, Failures: 2, Errors: 0, Skipped: 5

Steps to reproduce

1. Build netty-tcnative from source (mvn install)
2. Build netty from source (mvn install)

Minimal yet complete reproducer code (or URL to code)

NA

Netty version

master

JVM version (e.g. java -version)

openjdk version "1.8.0_302"
OpenJDK Runtime Environment (build 1.8.0_302-b08)
OpenJDK 64-Bit Server VM (build 25.302-b08, mixed mode)

OS version (e.g. uname -a)

Linux 9d7f20f28a85 4.18.0-240.22.1.el8_3.ppc64le #1 SMP Thu Mar 25 14:33:26 EDT 2021 ppc64le ppc64le ppc64le GNU/Linux

[chrisvest]

Are you consistently getting this test failure on repeated runs? Some of our tests are flaky and fail on occasion.

[seth-priya]

@chrisvest yes these are consistent. I am seeing flakiness in some of the others , especially when running in container vs VM host environment but these 2 seem to stick. I also see these with previous stable versions like netty-4.1.63.Final where everything else is passing consistently, these almost seem like networking issue but I am not sure what would be the best place to debug / things to check.

[chrisvest]

You're saying things broke in 4.1.64? There are some epoll changes, but not many: netty-4.1.63.Final...netty-4.1.64.Final

[seth-priya]

Sorry, no I meant these epoll tests are failing consistent even in netty-4.1.63.Final (that's where I started)