The following test timed out in the JDK16 CI:

sun/security/pkcs11/Cipher/TestGCMKeyAndIvCheck.java

Here's a snippet from the log file:

#section:main
----------messages:(8/240)----------
command: main TestGCMKeyAndIvCheck
reason: User specified action: run main TestGCMKeyAndIvCheck
Mode: agentvm
Agent id: 20
Timeout refired 480 times
Timeout information:
--- Timeout information end.
elapsed time (seconds): 579.535
----------configuration:(15/1378)*----------
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_tier2_part1\\patches\\java.base

Test Layer
  class path: T:\\testoutput\\test-support\\jtreg_open_test_jdk_tier2_part1\\classes\\3\\sun\\security\\pkcs11\\Cipher\\TestGCMKeyAndIvCheck.d
              C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-16+16-647\\src.full\\open\\test\\jdk\\sun\\security\\pkcs11\\Cipher
              T:\\testoutput\\test-support\\jtreg_open_test_jdk_tier2_part1\\classes\\3\\test\\lib
              C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-16+16-647\\src.full\\open\\test\\lib
              T:\\testoutput\\test-support\\jtreg_open_test_jdk_tier2_part1\\classes\\3\\sun\\security\\pkcs11
              C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-16+16-647\\src.full\\open\\test\\jdk\\sun\\security\\pkcs11

----------rerun:(36/5261)*----------

<snip>

result: Error. Agent error: java.lang.Exception: Agent 20 timed out with a timeout of 480 seconds; check console log for any additional details