[Opened c:\pippo\wl12.1\oracle_common\modules\endorsed\javax-xml-bind.jar] [Opened c:\pippo\wl12.1\oracle_common\modules\endorsed\javax-xml-ws.jar] [Opened c:\pippo\wl12.1\oracle_common\modules\endorsed\jsr250-api.jar] [Opened c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.Object from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.io.Serializable from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.Comparable from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.CharSequence from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.String from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.reflect.GenericDeclaration from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.reflect.Type from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.reflect.AnnotatedElement from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.Class from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.Cloneable from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.ClassLoader from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.System from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.Throwable from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.Error from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.ThreadDeath from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.Exception from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.RuntimeException from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.security.ProtectionDomain from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.security.AccessControlContext from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.ReflectiveOperationException from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.ClassNotFoundException from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.LinkageError from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.NoClassDefFoundError from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.ClassCastException from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.ArrayStoreException from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.VirtualMachineError from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.OutOfMemoryError from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar] [Loaded java.lang.StackOverflowError from c:\pippo\java\jdk170_101-64b\jre\lib\rt.jar]
but this is not enough to discover nasty classloader issues. I have searched the Planet but apparently there is no way to print also the classloader without with Java OOTB.
This is a lot better:
https://blogs.oracle.com/sundararajan/entry/tracing_class_loading_1_5
and I copy the code here just in case:
import java.lang.instrument.*;
import java.security.*;
public class ClassLoadTracer {
public static void premain(String agentArgs, Instrumentation inst) {
final java.io.PrintStream out = System.out;
inst.addTransformer(new ClassFileTransformer() {
public byte[] transform(ClassLoader loader, String className, Class classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
out.print(className + " loaded by " + loader + " at " + new java.util.Date());
out.println(" in " + protectionDomain);
// dump stack trace of the thread loading class
// Thread.dumpStack();
// we just want the original .class bytes to be loaded!
// we are not instrumenting it...
return null;
}
});
}
}
and you get this:
sun/launcher/LauncherHelper loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
sun/nio/cs/MS1252 loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
sun/nio/cs/SingleByte loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
sun/nio/cs/SingleByte$Decoder loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
java/lang/Package loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
weblogic/Server loaded by sun.misc.Launcher$AppClassLoader@2792e317 at Fri Nov 11 10:48:52 CET 2016 in ProtectionDomain (file:/c:\pippo\wl12.1/wlserver/modules/features/weblogic.server.merged.jar <no signer certificates>)
sun.misc.Launcher$AppClassLoader@2792e317
<no principals>
java.security.Permissions@54a01a10 (
("java.lang.RuntimePermission" "exitVM")
("java.io.FilePermission" "\c:\pippo\wl12.1\wlserver\modules\features\weblogic.server.merged.jar" "read")
)
java/lang/Void loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
utils/ValidateJavaEE6EndorsedOverrides loaded by sun.misc.Launcher$AppClassLoader@2792e317 at Fri Nov 11 10:48:52 CET 2016 in ProtectionDomain (file:/c:\pippo\wl12.1/wlserver/modules/features/weblogic.server.merged.jar <no signer certificates>)
sun.misc.Launcher$AppClassLoader@2792e317
<no principals>
java.security.Permissions@54a01a10 (
("java.lang.RuntimePermission" "exitVM")
("java.io.FilePermission" "\c:\pippo\wl12.1\wlserver\modules\features\weblogic.server.merged.jar" "read")
)
weblogic/security/utils/SecurityUtils loaded by sun.misc.Launcher$AppClassLoader@2792e317 at Fri Nov 11 10:48:52 CET 2016 in ProtectionDomain (file:/c:\pippo\wl12.1/wlserver/modules/features/weblogic.server.merged.jar <no signer certificates>)
sun.misc.Launcher$AppClassLoader@2792e317
<no principals>
java.security.Permissions@54a01a10 (
("java.lang.RuntimePermission" "exitVM")
("java.io.FilePermission" "\c:\pippo\wl12.1\wlserver\modules\features\weblogic.server.merged.jar" "read")
)
java/security/Security loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
java/security/Security$1 loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
java/util/Properties$LineReader loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
sun/security/util/PropertyExpander loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
sun/net/ProgressMonitor loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
sun/net/DefaultProgressMeteringPolicy loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
sun/net/ProgressMeteringPolicy loaded by null at Fri Nov 11 10:48:52 CET 2016 in null
weblogic/security/SecurityLogger loaded by sun.misc.Launcher$AppClassLoader@2792e317 at Fri Nov 11 10:48:52 CET 2016 in ProtectionDomain (file:/c:\pippo\wl12.1/wlserver/modules/features/weblogic.server.merged.jar <no signer certificates>)
sun.misc.Launcher$AppClassLoader@2792e317
<no principals>
java.security.Permissions@54a01a10 (
("java.lang.RuntimePermission" "exitVM")
("java.io.FilePermission" "\c:\pippo\wl12.1\wlserver\modules\features\weblogic.server.merged.jar" "read")
)
The protection domain info is way too verbose, and probably you want to be able to control/filter better the output, otherwise it gets really too verbose.... but this seems to be really a big step forward...
You can use multiple agents:
http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/instrument/package-summary.html
On JVMs with a command-line interface, agents are specified by adding this switch to the JVM command-line: -javaagent:jarpath[=options] jarpath is the path to the agent JAR file. options is the agent options. This switch may be used multiple times on the same command line, thus creating multiple agents. More than one agent may use the same jarpath.
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