The failure was first observed on x86_32.
```
Command line: [/home/jdk/build/linux-x86-server-fastdebug/images/jdk/bin/java -cp /home/jdk/build/linux-x86-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_runtime_cds_appcds_TestDumpClassListSource_java/classes/0/runtime/cds/appcds/TestDumpClassListSource.d:/home/jdk/test/hotspot/jtreg/runtime/cds/appcds:/home/jdk/build/linux-x86-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_runtime_cds_appcds_TestDumpClassListSource_java/classes/0/test/lib:/home/jdk/test/lib:/home/jdk/build/linux-x86-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_runtime_cds_appcds_TestDumpClassListSource_java/classes/0/test/hotspot/jtreg/runtime/cds/appcds:/opt/jtreg/lib/javatest.jar:/opt/jtreg/lib/jtreg.jar -Xshare:dump -XX:SharedClassListFile=test-classlist.list -XX:SharedArchiveFile=test-hello.jsa -cp /home/jdk/build/linux-x86-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_runtime_cds_appcds_TestDumpClassListSource_java/scratch/0/test-hello.jar ClassListWithCustomClassNoSource 3 ]
[2022-01-22T08:43:15.974046758Z] Gathering output for process 1849
[ELAPSED: 198 ms]
[logging stdout to /home/jdk/build/linux-x86-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_runtime_cds_appcds_TestDumpClassListSource_java/scratch/0/runtime.cds.appcds.TestDumpClassListSource.java-0004-custom-dump.stdout]
[logging stderr to /home/jdk/build/linux-x86-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_runtime_cds_appcds_TestDumpClassListSource_java/scratch/0/runtime.cds.appcds.TestDumpClassListSource.java-0004-custom-dump.stderr]
[STDERR]
An error has occurred while processing class list file test-classlist.list 723:32.
AppCDS custom class loaders not supported on this platform:
Hello id: 701 super: 0 source: /home/jdk/build/linux-x86-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_runtime_cds_appcds_TestDumpClassListSource_java/scratch/0/test-hello.jar
                               ^

STDERR:
java.lang.RuntimeException: Archive file test-hello.jsa should be created
        at TestDumpClassListSource.checkFileExistence(TestDumpClassListSource.java:87)
        at TestDumpClassListSource.main(TestDumpClassListSource.java:210)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:577)
        at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
        at java.base/java.lang.Thread.run(Thread.java:833)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Archive file test-hello.jsa should be created
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Archive file test-hello.jsa should be created
```