It would look as a repetition of the JDK-8288907 or JDK-8294741, if not for the huge timeouts - more than 2 hours and the fact that linux-x86 does also show the problem.

The log is laconic:

----------System.out:(21/730)----------
Agent init started
Agent init finished

## Java: runIt: Starting threads
## Java: started thread: TestedThread0
## Java: started thread: TestedThread1
## Java: started thread: TestedThread2
## Java: started thread: TestedThread3
## Java: started thread: TestedThread4
## Java: started thread: TestedThread5
## Java: started thread: TestedThread6
## Java: started thread: TestedThread7
## Java: started thread: TestedThread8
## Java: started thread: TestedThread9
## Java: started thread: TestedThread10
## Java: started thread: TestedThread11
## Java: started thread: TestedThread12
## Java: started thread: TestedThread13
## Java: started thread: TestedThread14
## Java: started thread: TestedThread15
Timeout refired 9600 times
...
test result: ...timed out (timeout set to 9600000ms, elapsed time including timeout handling was 9870584ms).