More than half of jdk_jdi tests failed with Dragonwell jdk on packet boxes

More than half of jdk_jdi tests failed with Dragonwell jdk8 on packet boxes. Tests passed on other boxes. Also test build took 4 hours compared 40 mins on other boxes. Test builds with hotspot|openj9 on packet boxes also take three times longer than on other boxes without behaviour difference. That is test results are consistent running on packet or other boxes.

https://ci.adoptopenjdk.net/view/Test_openjdk/job/Test_openjdk8_dragonwell_sanity.openjdk_x86-64_linux/14/
https://ci.adoptopenjdk.net/view/Test_openjdk/job/Test_openjdk8_dragonwell_sanity.openjdk_x86-64_linux/12/
https://ci.adoptopenjdk.net/view/Test_openjdk/job/Test_openjdk8_dragonwell_sanity.openjdk_x86-64_linux/10/

Not sure what's the difference between packet boxes with other except for performance?

Start by reviewing the linked Test_openjdk8_dragonwell_sanity.openjdk_x86-64_linux Jenkins runs and the jdk_jdi results, then compare them with hotspot and openj9 runs on packet and other boxes. Done means identifying the packet-box difference that causes the failures and threefold-or-worse runtime increase, with comparable test results and build duration restored.

Written by the indexing model from the issue text.