The following test failed in the JDK14 CI:

jdk/jfr/api/consumer/streaming/TestOutOfProcessMigration.java

Here's a snippet from the log file:

----------System.err:(1/16)----------
STATUS:Passed.
----------rerun:(44/5647)*----------
cd 'T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\scratch\\6' && \\
JDK8_HOME=c:/ade/mesos/work_dir/jib-master/install/jdk/13/33/bundles/windows-x64/jdk-13_windows-x64_bin.zip/jdk-13 \\
JIB_DATA_DIR=C:/ade/mesos/work_dir/jib-master \\
JIB_HOME=c:/ade/mesos/work_dir/jib-master/install/com/oracle/java/jib/jib/3.0-SNAPSHOT/jib-3.0-SNAPSHOT-distribution.zip-1571092944/jib-3.0-SNAPSHOT-distribution \\
JTREG_KEYWORDS="!headful" \\
JTREG_VERBOSE=fail,error,time \\
PATH='C:\\ade\\mesos\\work_dir\\jib-master\\install\\java\\re\\jtreg\\4.2\\promoted\\all\\b14\\bundles\\jtreg_bin-4.2.zip\\jtreg\\bin;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jpg\\infra\\builddeps\\gnumake-cygwin_x64\\4.0+1.0\\gnumake-cygwin_x64-4.0+1.0.tar.gz\\cygwin\\bin;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk\\13\\33\\bundles\\windows-x64\\jdk-13_windows-x64_bin.zip\\jdk-13\\bin;C:\\cygwin\\usr\\local\\bin;C:\\cygwin\\bin;C:\\cygwin\\bin;C:\\cygwin\\bin;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0;C:\\cygwin\\bin' \\
SystemDrive=C: \\
SystemRoot='C:\\Windows' \\
TEMP='C:\\cygwin\\tmp' \\
TEST_IMAGE_DIR=c:/ade/mesos/work_dir/jib-master/install/jdk-14+25-1140/windows-x64-debug.test \\
TEST_IMAGE_GRAAL_DIR=c:/ade/mesos/work_dir/jib-master/install/jdk-14+25-1140/windows-x64-debug.test/hotspot/jtreg/graal \\
TMP='C:\\cygwin\\tmp' \\
TZ=Etc/GMT \\
_NT_SYMBOL_PATH=C:/ade/mesos/work_dir/jib-master/install/jdk-14+25-1140/windows-x64-debug.jdk_symbols/jdk-14/fastdebug/bin/;C:/ade/mesos/work_dir/jib-master/install/jdk-14+25-1140/windows-x64-debug.jdk_symbols/jdk-14/fastdebug/bin/server/ \\
windir='C:\\Windows' \\
CLASSPATH='T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\jdk\\jfr\\api\\consumer\\streaming\\TestOutOfProcessMigration.d;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\src.full\\open\\test\\jdk\\jdk\\jfr\\api\\consumer\\streaming;T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\test\\lib;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\src.full\\open\\test\\lib;T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\test\\jdk;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\src.full\\open\\test\\jdk;C:\\ade\\mesos\\work_dir\\jib-master\\install\\java\\re\\jtreg\\4.2\\promoted\\all\\b14\\bundles\\jtreg_bin-4.2.zip\\jtreg\\lib\\javatest.jar;C:\\ade\\mesos\\work_dir\\jib-master\\install\\java\\re\\jtreg\\4.2\\promoted\\all\\b14\\bundles\\jtreg_bin-4.2.zip\\jtreg\\lib\\jtreg.jar' \\
    'c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\windows-x64-debug.jdk\\jdk-14\\fastdebug\\bin\\java' \\
        -Dtest.class.path.prefix='T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\jdk\\jfr\\api\\consumer\\streaming\\TestOutOfProcessMigration.d;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\src.full\\open\\test\\jdk\\jdk\\jfr\\api\\consumer\\streaming;T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\test\\lib;T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\test\\jdk' \\
        -Dtest.src='C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\src.full\\open\\test\\jdk\\jdk\\jfr\\api\\consumer\\streaming' \\
        -Dtest.src.path='C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\src.full\\open\\test\\jdk\\jdk\\jfr\\api\\consumer\\streaming;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\src.full\\open\\test\\lib;C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\src.full\\open\\test\\jdk' \\
        -Dtest.classes='T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\jdk\\jfr\\api\\consumer\\streaming\\TestOutOfProcessMigration.d' \\
        -Dtest.class.path='T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\jdk\\jfr\\api\\consumer\\streaming\\TestOutOfProcessMigration.d;T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\test\\lib;T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\classes\\7\\test\\jdk' \\
        -Dtest.vm.opts='-Xmx512m -XX:MaxRAMPercentage=3 -ea -esa' \\
        -Dtest.tool.vm.opts='-J-Xmx512m -J-XX:MaxRAMPercentage=3 -J-ea -J-esa' \\
        -Dtest.compiler.opts= \\
        -Dtest.java.opts='-ea -esa -XX:-UseNotificationThread' \\
        -Dtest.jdk='c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\windows-x64-debug.jdk\\jdk-14\\fastdebug' \\
        -Dcompile.jdk='c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\windows-x64-debug.jdk\\jdk-14\\fastdebug' \\
        -Dtest.timeout.factor=4.0 \\
        -Dtest.root='C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\src.full\\open\\test\\jdk' \\
        -Dtest.modules='jdk.jfr jdk.attach java.base/jdk.internal.misc' \\
        -Dtest.nativepath='c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\windows-x64-debug.test\\jdk\\jtreg\\native' \\
        --add-modules jdk.jfr,jdk.attach,java.base \\
        --add-exports java.base/jdk.internal.misc=ALL-UNNAMED \\
        -Xmx512m \\
        -XX:MaxRAMPercentage=3 \\
        -ea \\
        -esa \\
        -ea \\
        -esa \\
        -XX:-UseNotificationThread \\
        '-Djava.library.path=c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-14+25-1140\\windows-x64-debug.test\\jdk\\jtreg\\native' \\
        com.sun.javatest.regtest.agent.MainWrapper 'T:\\testoutput\\test-support\\jtreg_open_test_jdk_jdk_svc\\jdk\\jfr\\api\\consumer\\streaming\\TestOutOfProcessMigration.d\\main.0.jta'
result: Passed. Execution successful


test result: Error. failed to clean up files after test


Please note that the test passed:

> STATUS:Passed.
> result: Passed. Execution successful

and then we get:

> test result: Error. failed to clean up files after test

Usually this is an indicator of a file that wasn't closed.