The following tests timed out in the JDK17 CI and might be a related issue:

1) java/util/Locale/LocaleProvidersRun.java
2) sun/util/locale/provider/CalendarDataRegression.java

Here are snippets from the log files:
1)
#section:main
----------messages:(7/485)----------
command: main -Djdk.lang.Process.allowAmbiguousCommands=false LocaleProvidersRun
reason: User specified action: run main/othervm -Djdk.lang.Process.allowAmbiguousCommands=false LocaleProvidersRun
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules java.base --add-exports java.base/sun.util.locale=ALL-UNNAMED --add-exports java.base/sun.util.locale.provider=ALL-UNNAMED
Timeout information:
--- Timeout information end.
elapsed time (seconds): 2025.69
----------configuration:(5/187)----------
Boot Layer
  add modules: java.base
  add exports: java.base/sun.util.locale ALL-UNNAMED
               java.base/sun.util.locale.provider ALL-UNNAMED

----------System.out:(255/42026)----------
DEFLANG = en
DEFCTRY = US
DEFFMTLANG = en
DEFFMTCTRY = US
Command line: [/System/Volumes/Data/mesos/work_dir/jib-master/install/jdk-17+26-2325/macosx-x64-debug.jdk/jdk-17/fastdebug/bin/java -ea -esa -cp /System/Volumes/Data/mesos/work_dir/slaves/35546316-ed70-4084-8244-d672e7734fd1-S41157/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/1edea1e5-6aa0-4938-8d4c-81b9a1b0cac9/runs/edb0c348-1cf0-45f2-bf2a-376e3734fdb3/testoutput/test-support/jtreg_open_test_jdk_jdk_util/classes/2/java/util/Locale/LocaleProvidersRun.d:/System/Volumes/Data/mesos/work_dir/slaves/35546316-ed70-4084-8244-d672e7734fd1-S41157/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/1edea1e5-6aa0-4938-8d4c-81b9a1b0cac9/runs/edb0c348-1cf0-45f2-bf2a-376e3734fdb3/testoutput/test-support/jtreg_open_test_jdk_jdk_util/classes/2/test/lib -Djava.util.logging.config.class=LocaleProviders$LogConfig -Djava.locale.providers=HOST,JRE --add-exports=java.base/sun.util.locale.provider=ALL-UNNAMED LocaleProviders adapterTest HOST en US]
[2021-06-08T01:42:16.106801Z] Gathering output for process 46813
[2021-06-08T01:42:18.817995Z] Waiting for completion for process 46813
[2021-06-08T01:42:18.846002Z] Waiting for completion finished for process 46813
Output and diagnostic info for process 46813 was saved into 'pid-46813-output.log'
testLocale: en_US, got: HOST, expected: HOST
.......
.......
2021-06-08T01:42:30.675151Z] Waiting for completion for process 46841
[2021-06-08T01:42:30.675163Z] Waiting for completion finished for process 46841
Command line: [/System/Volumes/Data/mesos/work_dir/jib-master/install/jdk-17+26-2325/macosx-x64-debug.jdk/jdk-17/fastdebug/bin/java -ea -esa -cp /System/Volumes/Data/mesos/work_dir/slaves/35546316-ed70-4084-8244-d672e7734fd1-S41157/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/1edea1e5-6aa0-4938-8d4c-81b9a1b0cac9/runs/edb0c348-1cf0-45f2-bf2a-376e3734fdb3/testoutput/test-support/jtreg_open_test_jdk_jdk_util/classes/2/java/util/Locale/LocaleProvidersRun.d:/System/Volumes/Data/mesos/work_dir/slaves/35546316-ed70-4084-8244-d672e7734fd1-S41157/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/1edea1e5-6aa0-4938-8d4c-81b9a1b0cac9/runs/edb0c348-1cf0-45f2-bf2a-376e3734fdb3/testoutput/test-support/jtreg_open_test_jdk_jdk_util/classes/2/test/lib -Djava.util.logging.config.class=LocaleProviders$LogConfig -Djava.locale.providers=HOST --add-exports=java.base/sun.util.locale.provider=ALL-UNNAMED LocaleProviders bug8232871Test ]
[2021-06-08T01:42:30.679300Z] Gathering output for process 46842
[2021-06-08T01:42:31.116069Z] Waiting for completion for process 46842
[2021-06-08T01:42:31.116118Z] Waiting for completion finished for process 46842
Output and diagnostic info for process 46842 was saved into 'pid-46842-output.log'
Test ignored. Either :-
OS is not macOS, or
provider is not HOST: HOST, or
Language is not Japanese: en, or
native calendar is not JapaneseCalendar: gregory

[2021-06-08T01:42:31.116872Z] Waiting for completion for process 46842
[2021-06-08T01:42:31.116889Z] Waiting for completion finished for process 46842
Command line: [/System/Volumes/Data/mesos/work_dir/jib-master/install/jdk-17+26-2325/macosx-x64-debug.jdk/jdk-17/fastdebug/bin/java -ea -esa -cp /System/Volumes/Data/mesos/work_dir/slaves/35546316-ed70-4084-8244-d672e7734fd1-S41157/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/1edea1e5-6aa0-4938-8d4c-81b9a1b0cac9/runs/edb0c348-1cf0-45f2-bf2a-376e3734fdb3/testoutput/test-support/jtreg_open_test_jdk_jdk_util/classes/2/java/util/Locale/LocaleProvidersRun.d:/System/Volumes/Data/mesos/work_dir/slaves/35546316-ed70-4084-8244-d672e7734fd1-S41157/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/1edea1e5-6aa0-4938-8d4c-81b9a1b0cac9/runs/edb0c348-1cf0-45f2-bf2a-376e3734fdb3/testoutput/test-support/jtreg_open_test_jdk_jdk_util/classes/2/test/lib -Djava.util.logging.config.class=LocaleProviders$LogConfig -Djava.locale.providers=HOST --add-exports=java.base/sun.util.locale.provider=ALL-UNNAMED LocaleProviders bug8232860Test ]
[2021-06-08T01:42:31.120953Z] Gathering output for process 46843
Timeout refired 1920 times
----------System.err:(0/0)----------

2)
section:main
----------messages:(6/303)----------
command: main -ea -esa -Djava.locale.providers=HOST CalendarDataRegression
reason: User specified action: run main/othervm -ea -esa -Djava.locale.providers=HOST CalendarDataRegression
Mode: othervm [/othervm specified]
Timeout information:
--- Timeout information end.
elapsed time (seconds): 1998.084
----------configuration:(0/0)----------
----------System.out:(1/27)----------
Timeout refired 1920 times
----------System.err:(0/0)----------

The total timeout is 1920 seconds (default timeout of 2 min * timeout factor of 16 = 32 min). There is no obvious reason why these 2 tests took that long.