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A number of serviceability fail intermittently with NoClassDefFoundError when run with jtreg and concurrency. The following is an incomplete list of the tests that are impacted: com/sun/tools/attach/ProviderTest.java java/lang/instrument/DaemonThread/TestDaemonThread.java: java/lang/instrument/PremainClass/PremainClassTest.java java/lang/instrument/PremainClass/ZeroArgPremainAgentTest.java sun/tools/jstatd/TestJstatdDefaults.java: sun/tools/jstatd/TestJstatdExternalRegistry.java: sun/tools/jstatd/TestJstatdPort.java: sun/tools/jstatd/TestJstatdPortAndServer.java: sun/tools/jstatd/TestJstatdServer.java: sun/tools/jstatd/TestJstatdUsage.java: com/sun/tools/attach/BasicTests.java: com/sun/management/HotSpotDiagnosticMXBean/CheckOrigin.java A typical failure is: java.lang.NoClassDefFoundError: jdk/testlibrary/JDKToolFinder at jdk.testlibrary.ProcessTools.createJavaProcessBuilder(ProcessTools.java:275) at jdk.testlibrary.ProcessTools.executeTestJvm(ProcessTools.java:314) at ProviderTest.runTests(ProviderTest.java:81) at ProviderTest.main(ProviderTest.java:52) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:484) at com.sun.javatest.regtest.MainAction$SameVMRunnable.run(MainAction.java:754) at java.lang.Thread.run(Thread.java:744) Caused by: java.lang.ClassNotFoundException: jdk.testlibrary.JDKToolFinder at java.net.URLClassLoader$1.run(URLClassLoader.java:372) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:360) at java.lang.ClassLoader.loadClass(ClassLoader.java:426) at java.lang.ClassLoader.loadClass(ClassLoader.java:359) ... 10 more java.lang.NoClassDefFoundError: jdk/testlibrary/JDKToolFinder at jdk.testlibrary.ProcessTools.createJavaProcessBuilder(ProcessTools.java:275) at jdk.testlibrary.ProcessTools.executeTestJvm(ProcessTools.java:314) at ProviderTest.runTests(ProviderTest.java:81) at ProviderTest.main(ProviderTest.java:52) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:484) at com.sun.javatest.regtest.MainAction$SameVMRunnable.run(MainAction.java:754) at java.lang.Thread.run(Thread.java:744) Caused by: java.lang.ClassNotFoundException: jdk.testlibrary.JDKToolFinder at java.net.URLClassLoader$1.run(URLClassLoader.java:372) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:360) at java.lang.ClassLoader.loadClass(ClassLoader.java:426) at java.lang.ClassLoader.loadClass(ClassLoader.java:359) ... 10 more
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