On Tue, 6 Apr 2021 03:16:29 GMT, Chris Plummer <cjplum...@openjdk.org> wrote:
>> SA has RMI remote object, it will be handled in RMI registry.
>> We can see following exception without `--add-modules`.
>>
>> $ jhsdb debugd --pid 40339 --disableregistry --hostname localhost
>> --registryport 1098
>> Attaching to process ID 40339 and starting RMI services, please wait...
>> Error attaching to process or starting server:
>> sun.jvm.hotspot.debugger.DebuggerException: java.rmi.ServerException:
>> RemoteException occurred in server thread; nested exception is:
>> java.rmi.UnmarshalException: error unmarshalling arguments; nested
>> exception is:
>> java.lang.ClassNotFoundException:
>> sun.jvm.hotspot.debugger.remote.RemoteDebugger
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.RMIHelper.rebind(RMIHelper.java:75)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:380)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:330)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.startServer(HotSpotAgent.java:216)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.runDEBUGD(SALauncher.java:437)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:499)
>> Caused by: java.rmi.ServerException: RemoteException occurred in server
>> thread; nested exception is:
>> java.rmi.UnmarshalException: error unmarshalling arguments; nested
>> exception is:
>> java.lang.ClassNotFoundException:
>> sun.jvm.hotspot.debugger.remote.RemoteDebugger
>> at
>> java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:389)
>> at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
>> at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
>> at
>> java.base/java.security.AccessController.doPrivileged(AccessController.java:691)
>> at
>> java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
>> at
>> java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:587)
>> at
>> java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828)
>> at
>> java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:705)
>> at
>> java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
>> at
>> java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704)
>> at
>> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
>> at
>> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
>> at java.base/java.lang.Thread.run(Thread.java:831)
>> at
>> java.rmi/sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:303)
>> at
>> java.rmi/sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:279)
>> at java.rmi/sun.rmi.server.UnicastRef.invoke(UnicastRef.java:380)
>> at
>> java.rmi/sun.rmi.registry.RegistryImpl_Stub.rebind(RegistryImpl_Stub.java:158)
>> at java.rmi/java.rmi.Naming.rebind(Naming.java:177)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.RMIHelper.rebind(RMIHelper.java:64)
>> ... 5 more
>> Caused by: java.rmi.UnmarshalException: error unmarshalling arguments;
>> nested exception is:
>> java.lang.ClassNotFoundException:
>> sun.jvm.hotspot.debugger.remote.RemoteDebugger
>> at
>> java.rmi/sun.rmi.registry.RegistryImpl_Skel.dispatch(RegistryImpl_Skel.java:157)
>> at
>> java.rmi/sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:466)
>> at
>> java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:296)
>> at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
>> at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
>> at
>> java.base/java.security.AccessController.doPrivileged(AccessController.java:691)
>> at
>> java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
>> at
>> java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:587)
>> at
>> java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828)
>> at
>> java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:705)
>> at
>> java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
>> at
>> java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704)
>> at
>> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
>> at
>> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
>> at java.base/java.lang.Thread.run(Thread.java:831)
>> Caused by: java.lang.ClassNotFoundException:
>> sun.jvm.hotspot.debugger.remote.RemoteDebugger
>> at
>> java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:432)
>> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:586)
>> at
>> java.rmi/sun.rmi.server.LoaderHandler$Loader.loadClass(LoaderHandler.java:1207)
>> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
>> at java.base/java.lang.Class.forName0(Native Method)
>> at java.base/java.lang.Class.forName(Class.java:466)
>> at
>> java.rmi/sun.rmi.server.LoaderHandler.loadClassForName(LoaderHandler.java:1221)
>> at
>> java.rmi/sun.rmi.server.LoaderHandler.loadProxyInterfaces(LoaderHandler.java:731)
>> at
>> java.rmi/sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:674)
>> at
>> java.rmi/sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:611)
>> at
>> java.rmi/java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:646)
>> at
>> java.rmi/java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:311)
>> at
>> java.rmi/sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:254)
>> at
>> java.base/java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1944)
>> at
>> java.base/java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1886)
>> at
>> java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2196)
>> at
>> java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1706)
>> at
>> java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:496)
>> at
>> java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:454)
>> at
>> java.rmi/sun.rmi.registry.RegistryImpl_Skel.dispatch(RegistryImpl_Skel.java:154)
>> ... 14 more
>>
>> As an option, we can also use RMI registry which is started by debugd as
>> following:
>>
>> * console 1
>> * `jhsdb debugd --disableregistry --pid 40859`
>> * console 2
>> * `jhsdb -J-Dsun.jvm.hotspot.rmi.serverNamePrefix=second debugd
>> --disableregistry --pid 40860`
>
> Both of the above are using `--disableregistry`. Is that what you meant to
> do? I would think that you would not want that on the first one.
Sorry, the correct commands are as follows:
* console 1 (start RMI registry)
* `jhsdb debugd --pid 40859`
* console 2 (add `--disableregistry` to use it in console 1)
* `jhsdb -J-Dsun.jvm.hotspot.rmi.serverNamePrefix=second debugd
--disableregistry --pid 40860`
-------------
PR: https://git.openjdk.java.net/jdk/pull/3233
