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POWhat could cause RMI method calls to fail intermittently?
 

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  1. POWhat could cause RMI method calls to fail intermittently?
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    <p>Long story short, I have an RMI Server and Client. The Server and Client are capable of making RMI calls on each other. After the Client connects to the Server, the Server may make many hundreds of method calls in quick succession on the Client.</p> <p>The problem is this - towards the end of a huge batch of Server-to-Client method calls, some will fail because RMI claims it cannot establish a connection from Server-to-Client, even though hundreds of calls before it will succeed. I can't post any real code because this project is rather large (about 50k lines), but here's the full stack trace of the exception that gets thrown:</p> <pre><code>java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is: java.net.SocketException: Connection reset at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source) at sun.rmi.transport.Transport$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Unknown Source) at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source) at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source) at sun.rmi.server.UnicastRef.invoke(Unknown Source) at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unknown Source) at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source) at $Proxy0.findClassDefinition(Unknown Source) at com.fabric.network.NetworkClassLoader.findClass(NetworkClassLoader.java:111) at java.lang.ClassLoader.loadClass(Unknown Source) at com.fabric.network.NetworkClassLoader.loadClass(NetworkClassLoader.java:131) at java.lang.ClassLoader.loadClass(Unknown Source) at com.fabric.network.MessageSocket$CustomObjectInputStream.resolveClass(MessageSocket.java:171) at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source) at java.io.ObjectInputStream.readClassDesc(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.defaultReadFields(Unknown Source) at java.io.ObjectInputStream.readSerialData(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.defaultReadFields(Unknown Source) at java.io.ObjectInputStream.readSerialData(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.readObject(Unknown Source) at com.fabric.network.MessageSocket.receive(MessageSocket.java:118) at com.fabric.application.driver.NodeRemoteDriver$IncomingMessageThread.run(NodeRemoteDriver.java:205) Caused by: java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is: java.net.SocketException: Connection reset at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source) at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source) at sun.rmi.server.UnicastRef.invoke(Unknown Source) at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unknown Source) at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source) at $Proxy2.findClassDefinition(Unknown Source) at com.fabric.network.ClassDefinitionCache.findClassDefinition(ClassDefinitionCache.java:78) at com.fabric.management.host.NodeManagementServices.findClassDefinition(NodeManagementServices.java:231) at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source) at sun.rmi.transport.Transport$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Unknown Source) at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.net.SocketException: Connection reset at java.net.SocketInputStream.read(Unknown Source) at java.io.BufferedInputStream.fill(Unknown Source) at java.io.BufferedInputStream.read(Unknown Source) at java.io.DataInputStream.readByte(Unknown Source) ... 21 more </code></pre> <p>Again, sorry I can't provide much in the way of code, but I'm not necessarily asking for a code fix - I just want to wrap my head around why this might be happening.</p> <p><strong>EDIT</strong></p> <p>Added the full stack trace.</p>
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    1. COMay hep you: http://docs.oracle.com/javase/jndi/tutorial/objects/storing/remote.html
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      1. POWhat could cause RMI method calls to fail intermittently?
      1. USPaul Vargas
    2. COMy question may be a bit silly but did you check if there are any exceptions on the client side?
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      1. POWhat could cause RMI method calls to fail intermittently?
      1. USMartin Prakash
    3. CO@MartinPrakash Yes, it is. This *is* an exception on the client side.
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      1. USuser207421
 

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