The following test fails in the JDK15 CI:

jdk/jshell/FailOverExecutionControlDyingLaunchTest.java

This test failure is due to an agentvm mode timeout:

#section:testng
----------messages:(9/393)----------
command: testng FailOverExecutionControlDyingLaunchTest
reason: User specified action: run testng FailOverExecutionControlDyingLaunchTest
Mode: agentvm
Agent id: 4
Additional exports to unnamed modules from @modules: jdk.jshell/jdk.jshell.execution jdk.jshell/jdk.jshell.spi
Timeout refired 480 times
Timeout information:
--- Timeout information end.
elapsed time (seconds): 676.081
----------configuration:(12/920)*----------

<snip>

result: Error. Agent error: java.lang.Exception: Agent 4 timed out with a timeout of 480 seconds; check console log for any additional details


test result: Error. Agent error: java.lang.Exception: Agent 4 timed out with a timeout of 480 seconds; check console log for any additional details

PLEASE, DO NOT ADD OTHER FAILURE MODES TO THIS BUG.