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aduros avatar deadmoose avatar groves avatar jamie-threerings avatar mthomas96 avatar samskivert avatar tconkling avatar

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rastaman06 sp2020jarvan etithespirit

nexus's Issues

Server crash

I have a prototype using nexus and am getting an intermittent crash in the server when a client disconnects. The proximate cause is a null pointer, but it looks like there may be some deeper thread safety issues with JVMServerConnection._chan.

I'm calling nexus.clearKeyed for any objects associated with the client, on the signal SessionLocal.getSession().onDisconnect(). The crash occurs after that, when some downstream messages are sent to the disconnected client.

Stack trace:

Thread [JVMConnectionManager I/O writer] (Suspended (exception NullPointerException))   
JVMConnectionManager.connectionClosed(SocketChannel, IOException) line: 192 
JVMServerConnection.onClose(IOException) line: 137  
JVMServerConnection.writeMessages() line: 72    
JVMConnectionManager.writeLoop() line: 242  
JVMConnectionManager$3.run() line: 83

In the debugger, I can see that _chan is null. The write loop is terminated and the server stops working.

Console output. The first line here is printed from disconnect slot:

protomgr: Player logged out [name=jamie]
Feb 10, 2014 5:42:55 AM com.threerings.nexus.util.Log$JavaLogger log
INFO: Connection closed [addr=/127.0.0.1, cause=null]
Feb 10, 2014 5:42:55 AM com.threerings.nexus.util.Log$JavaLogger log
WARNING: Attempted to disconnect while already disconnecting.
java.nio.channels.ClosedChannelException
    at sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:135)
    at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:326)
    at com.threerings.nexus.server.JVMServerConnection.writeMessages(JVMServerConnection.java:52)
    at com.threerings.nexus.server.JVMConnectionManager.writeLoop(JVMConnectionManager.java:242)
    at com.threerings.nexus.server.JVMConnectionManager$3.run(JVMConnectionManager.java:83)

Support arrays as service return types

I have a service method which wants to returns an array of strings, i.e.:

interface FooService {
    RFuture<String[]> getNames ();
}

When running the implementation, nexus complains about a missing Streamer_String class. I looked at it briefly and it seems to not support arrays. I figure this is an oversight since arrays are supported elsewhere.

Exception:

com.threerings.nexus.io.StreamException: Error instantiating streamer [Ljava.lang.Streamer_String;
at com.threerings.nexus.io.JVMIO.findStreamer(JVMIO.java:376)
at com.threerings.nexus.io.JVMIO$2.resolveAndWriteClass(JVMIO.java:336)
at com.threerings.nexus.io.JVMIO$2.writeStreamer(JVMIO.java:323)
at com.threerings.nexus.io.Streamable$Output.writeValue(Streamable.java:304)
    ...
Caused by: java.lang.ClassNotFoundException: java.lang.Streamer_String
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)

Ant doesn't build the 'nexus-project' package

At the top level, there's a pom for 'nexus-project', but the ant file at that level just recurses into the OTHER things and builds those poms, so if you follow the README's instructions, trying to run the chat demo fails because you don't have the meta package built.

Although I'm a little confused since looking at the poms, I don't see how it would depend on that, plus running 'mvn dependency:tree' doesn't list it, but experimentally it sure screamed about missing that until I just built everything from at the top level directly with mvn instead of ant.

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