The following test timed out the JDK18 CI:

javax/management/monitor/AttributeArbitraryDataTypeTest.java

Here's a snippet from the log file:

#section:main
----------messages:(7/290)----------
command: main AttributeArbitraryDataTypeTest
reason: User specified action: run main AttributeArbitraryDataTypeTest
Mode: othervm
Additional options from @modules: --add-modules java.desktop,java.management
Timeout information:
--- Timeout information end.
elapsed time (seconds): 516.204
----------configuration:(3/56)----------
Boot Layer
  add modules: java.desktop java.management

----------System.out:(135/5562)----------
PDs: 1
Property: name
name: do_match_now

<snip>

>>> ----------------------------------------
>>> CREATE a new StringMonitor MBean
>>> ADD a listener to the StringMonitor
>>> CREATE a new ObservedObject MBean
>>> SET the attributes of the StringMonitor:
ATTRIBUTE "ObservedObject" = DefaultDomain:type=ObservedObject
ATTRIBUTE "ObservedAttribute" = ComplexAttribute.stringAttribute
ATTRIBUTE "NotifyMatch" = true
ATTRIBUTE "NotifyDiffer" = false
ATTRIBUTE "StringToCompare" = "do_match_now"
ATTRIBUTE "GranularityPeriod" = 500
>>> START the StringMonitor
Timeout refired 480 times
----------System.err:(0/0)----------
----------rerun:(39/5450)*----------

<snip>

result: Error. Program `/opt/mach5/mesos/work_dir/jib-master/install/jdk-18+4-86/linux-aarch64-debug.jdk/jdk-18/fastdebug/bin/java' timed out (timeout set to 480000ms, elapsed time including timeout handling was 516193ms).


The test timed out at 516 seconds and there's no indication that
the test passed while the timeout handler was running.