Should be reproducible with mtr --parallel=80 --suite=innodb on Linux with AIO enabled.
Default limit for AIO events is 65k. mtr can easily exhaust it, especially with spider tests.
There're 2 problems here:
1. Warning format has changed causing "check test case" failures. Suppressions in mysql-test-run.pl should be adjusted accordingly.
2. InnoDB aborts on AIO initialization failure. This was fixed in 10.0 after InnoDB 5.6 merge, see rev. fab9a55d077b4f2a511b273d5f51272f1e3dc1ff