NoClassDefFoundError in sun.misc. Unsafe.ensureClassInitialized

[Steve Leach]

Hi again all, here's my latest challenge...
While trying to run a report (using Jasper reports) on my new server I am getting a NoClassDefFoundError thrown by sun.misc.Unsafe.ensureClassInitialized().
I have included a full stack trace below, but it looks like the de-serializer is not finding one of the classes that was serialized when compiling the report.
So far so good.
The problem I have is that the exception has no message, and therefore I have no way of knowing which class it cannot find.
I have checked the javadoc for NoClassDefFoundError and it seems that there are no other methods that might provide the information about which class (which seems a strange ommission - you would have thought there would be a "getUnfoundClassName" method or something).
Does anyone have any suggestions on how I can track down the missing class ?
Please respond, even if only to say "no idea mate, sorry!".
Cheers
Steve

  
java.lang.NoClassDefFoundError
at sun.misc.Unsafe.ensureClassInitialized(Native Method)
at sun.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:20)
at sun.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:122)
at java.lang.reflect.Field.acquireFieldAccessor(Field.java:779)
at java.lang.reflect.Field.getFieldAccessor(Field.java:760)
at java.lang.reflect.Field.getLong(Field.java:398)
at java.io.ObjectStreamClass.getDeclaredSUID(ObjectStreamClass.java:1478)
at java.io.ObjectStreamClass.access$400(ObjectStreamClass.java:47)
at java.io.ObjectStreamClass$3.run(ObjectStreamClass.java:335)
at java.security.AccessController.doPrivileged(Native Method)
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:333)
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:253)
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:453)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1521)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
at java.util.ArrayList.readObject(ArrayList.java:547)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:838)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
at dori.jasper.engine.util.JRLoader.loadObject(JRLoader.java:134)
at dori.jasper.engine.JasperFillManager.fillReport(JasperFillManager.java:288)
at dori.jasper.engine.JasperRunManager.runReportToPdf(JasperRunManager.java:281)
at com.obas.servlets.ReportManager.runReport(ReportManager.java:153)
at com.obas.servlets.MainServlet.doReport(MainServlet.java:337)
at com.obas.servlets.MainServlet.doPost(MainServlet.java:292)
at com.obas.servlets.MainServlet.doGet(MainServlet.java:198)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:457)
at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:576)
at java.lang.Thread.run(Thread.java:534)

[William Brogden]

Since it says "native method" in

java.lang.NoClassDefFoundError
at sun.misc.Unsafe.ensureClassInitialized(Native Method)  

I am wondering if there is a DLL that it is looking for.
Bill

[Steve Leach]

Not a bad suggestion, except that it's running on a Linux system. I had a problem the other day because the X-Window libraries weren't installed, and that reported a problem in a different native method. It was a "library not found" error rather than a "class not found" error though.
The other issue is that, even if it is a missing library, I have no way to know which one is missing.