Seen when examining process information for timed out tests:

WARNING: can't parse child pid No Instance(s) Available. : For input string: "No Instance(s) Available."
java.lang.NumberFormatException: For input string: "No Instance(s) Available."
at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:67)
at java.base/java.lang.Long.parseLong(Long.java:618)
at java.base/java.lang.Long.valueOf(Long.java:974)
at jdk.test.failurehandler.action.ActionHelper.getChildren(ActionHelper.java:107)
at jdk.test.failurehandler.ToolKit.gatherProcessInfo(ToolKit.java:92)
at jdk.test.failurehandler.jtreg.GatherProcessInfoTimeoutHandler.runGatherer(GatherProcessInfoTimeoutHandler.java:113)
at jdk.test.failurehandler.jtreg.GatherProcessInfoTimeoutHandler.runActions(GatherProcessInfoTimeoutHandler.java:88)
at com.sun.javatest.regtest.TimeoutHandler.handleTimeout(TimeoutHandler.java:132)
at com.sun.javatest.regtest.exec.ProcessCommand$2.run(ProcessCommand.java:317)