The warning
* For target support_test_lib_test-lib_classes__the.BUILD_TEST_LIB_JAR_batch:
/home/lmesnik/ws/jdk-lib/open/test/lib/jdk/test/lib/security/timestamp/TsaServer.java:56: warning: [this-escape] possible 'this' escape before subclass is fully initialized
            setHandler(handler);

And:

open/test/lib/jdk/test/lib/security/timestamp/TsaServer.java:42: warning: [try] auto-closeable resource TsaServer has a member method close() that could throw InterruptedException