12-08-2010
SocketException : Connection Reset
Hi,
I am currently working on a Server/Client application on a cluster
I am running about 100 clients in parallel and one server (32 clients per node with 8 processor => 4 clients per processor) . The server is linked to all the clients via Sockets.
After about 55 iteration (about 20 mins), i have a client dying and i receive the following error:
Client 126 java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream. java:16
at java.net.SocketInputStream.read(SocketInputStream. java:182)
at java.io.ObjectInputStream$PeekInputStream.peek(Obj ectInputStream.java:2249)
at java.io.ObjectInputStream$BlockDataInputStream.pee k(ObjectInputStream.java:2542)
at java.io.ObjectInputStream$BlockDataInputStream.pee kByte(ObjectInputStream.java:2552)
at java.io.ObjectInputStream.readObject0(ObjectInputS tream.java:1297)
at java.io.ObjectInputStream.readObject(ObjectInputSt ream.java:351)
at ServerClient.Server$TcpThread.run(Server.java:789)
Connection reset
the Server.java.789 is : ServerThread.sockIn.readObject();
Do you have any idea what could create the connection reset ? The other clients are still running. It seems that the client socket is creating an exception when we try to read a file which actually does not exist.
My main question is what are the method to identify the problem related to this specific socket (note that I am working on a cluster, hence accessing the node via ssh connection and without having admin access).
I dont understand why suddenly one client would die. It was working well during 20 minutes and suddenly one die ? Do you have any idea and any advice on how to identify the reset of this Socket disconnection ?
I though about using wireshark but the fact that the application is running on a cluster make it difficult to analyze,sniff the packets remotely. I dont know if i can do it remotely.
Do you have any idea how I could debug this problem?
Thanks
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NAME
schemagen - Java(TM) Architecture for XML Binding Schema Generator Specification Version: 2.0
Reference Implementation (RI) Version: 2.0 ea3
Launching schemagen
The schema generator can be launched using the appropriate schemagen shell script in the bin directory for your platform.
The current schema generator can process either Java source files or class files.
We also provide an Ant task to run the schema generator - see the instructions for using schemagen with Ant.
For Solaris/Linux
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07 Aug 2006 schemagen(1)