The following test timed out in the JDK16 CI:

sun/tools/jstatd/TestJstatdRmiPort.java

Here's a snippet from the log file:

#section:main
----------messages:(8/245)----------
command: main TestJstatdRmiPort
reason: User specified action: run main/timeout=60 TestJstatdRmiPort
Mode: agentvm
Agent id: 28
Timeout refired 600 times
Timeout information:
--- Timeout information end.
elapsed time (seconds): 702.968
----------configuration:(13/1107)*----------
Boot Layer
  class path: C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\5.1\\b01\\bundles\\jtreg_bin-5.1.zip\\jtreg\\lib\\javatest.jar
              C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\5.1\\b01\\bundles\\jtreg_bin-5.1.zip\\jtreg\\lib\\jtreg.jar
              C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\5.1\\b01\\bundles\\jtreg_bin-5.1.zip\\jtreg\\lib\\junit.jar
              C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\5.1\\b01\\bundles\\jtreg_bin-5.1.zip\\jtreg\\lib\\testng.jar
  patch: java.base T:\\testoutput\\test-support\\jtreg_open_test_jdk_svc_tools\\patches\\java.base

Test Layer
  class path: T:\\testoutput\\test-support\\jtreg_open_test_jdk_svc_tools\\classes\\1\\sun\\tools\\jstatd\\TestJstatdRmiPort.d
              C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-16+9-362\\src.full\\open\\test\\jdk\\sun\\tools\\jstatd
              T:\\testoutput\\test-support\\jtreg_open_test_jdk_svc_tools\\classes\\1\\test\\lib
              C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-16+9-362\\src.full\\open\\test\\lib

----------rerun:(37/4737)*----------

The test specifies "main/timeout=60" but must have been
invoked with a timeoutFactor of 10 since the total timeout
value was 600 seconds/10 minutes. Including the timeout
handle, the test executed for 702.968 second.

I don't see any indicators in the log file as to what went wrong.