Single socket, multiple streams?
Hey,
I'm currently fiddling around writing an Instant Messenger, and expecting a problem.
Basically across the same socket I'll be sending messages (user-user), other client messages and small loads of image data.
I'm thinking concidering it's a single stream all information will be queued, for instance if:
1. The server is sending, lets say a 700mb file through the one socket (wouldn't happen, but to show my point).
2. Users are trying to message the user recieving the 700mb file through the same socket/connection.
Basically the way I'm seeing it is the messages the users are trying to send to the user won't go through untill the 700mb file is done sending because it was set first.
In short: Do socket output streams queue data in a way that messages will be withheld untill other information goes through? And if so how would I avoid this?
Thanks in advance,
Danny.
Thanks for the help, I'll look into it.
When I said messages I meant in the IM sense, just to show an example of where I believe the problem would have occured.
I think multiple socket connections may be the way to go, one for general protocol data and another (when needed) for image data.
Thanks again :)
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For my final project in my data commucnications class I'm writing a client/server socket application that will allow multiple clients to play TicTacToe simultaneously against the game on the server. The teacher is a C/C++ jock, and knows very little Java. We're free to choose any language that will do sockets, and I love Java and don't love C++.
I've built the GUI, and got it to the point that I can reliably connect multiple clients on different machines in the school lab to the Server object, which accepts the new sockets and creates a new thread of ServerGame to do the playing in response to the client's moves. A mousePressed() detects clicks in the grid, and modifies a string to contain the status of the game. I've used a BufferedReader and PrintWriter combination on both sides, to send the GameString back and forth, starting with "---------", then the client makes a move and it changes to "X--------" and the PrintWriter sends it over and the ServerGame makes a move to "X---O----" and send it back, etc, etc. You get the idea. I have a ways to go with the implementation of strategy stuff for the ServerGame's moves, but I like it so far. But now I realize it would be really cool to add to it.
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JVM_recv in socket input stream error
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What should I be looking for?
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Client:
COMMENT: Start a server using RMI. This appears to
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try {
DistLrnRemoteData dlrd =
(DistLrnRemoteData)Naming.lookup(
"//"+personHost+
"/DistanceLearningData");
dlrd.activatePersonServer(); // Get server going
catch (Exception e) {
System.err.println(e);
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System.err.println("Unable to initialize remote Person server");
e.printStackTrace(System.err);
Person result = new Person();
int count = 10;
boolean opened = false;
Socket gpsocket = null;
while (!opened) {
try {
COMMENT: The client attempts to open the socket
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COMMENT: from the class RemoteDataServer, so the
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COMMENT: or network outage problem.
gpsocket = new Socket(personHost,
RemoteDataServer.personReadPort);
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catch (IOException ioe) {
count--;
if (count <= 0) {
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COMMENT: or SecurityException stop the program.
System.err.println(ioe);
ioe.printStackTrace(System.err);
result = null;
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try {
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ie.printStackTrace(System.err);
// Read the serialized object
try {
COMMENT: No problem with the next line, which attempts
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MyStringWriter msw = new MyStringWriter(
gpsocket.getOutputStream());
COMMENT: The next line causes the message.
ObjectInputStream ois =
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msw.write(personRealName);
// Now read the resulting Person.
try {
result = (Person)(ois.readObject());
catch (ClassNotFoundException cnfe) {
System.err.println(cnfe);
cnfe.printStackTrace(System.err);
System.exit(4);
catch (IOException ioe) {
System.err.println(ioe);
ioe.printStackTrace(System.err);
result = null;
Server:
public void activateFocusServer() throws java.rmi.RemoteException {
String [] cmd = new String[2];
cmd[0] = new String("java");
cmd[1] = new String("RemoteDataServer");
try {
COMMENT: FORTE's Output window shows a message
COMMENT: from this process
Process dbserver =
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COMMENT: This message is never printed
System.err.println(ioe);
ioe.printStackTrace(System.err);
RemoteDataServer:
public RemoteDataServer() {
try {
...many different servers started here...
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PersonReadListener prl = new PersonReadListener(PersonReadSocket);
prl.start();
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COMMENT: This message is never printed.
System.err.println(ioe);
ioe.printStackTrace(System.err);
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// debug.println("Accepted a connection");
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catch (IOException ioe) {
COMMENT: These lines are NOT printed
System.err.println(ioe);
ioe.printStackTrace(System.err); -
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I'm trying to create a simple program that I can use to display PDF files that I can use to play at the piano. I perform often, and need to create "play lists" from which I can pull all, or part of, a PDF file containing music and display it.
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Hi there,
can anyone guide me in setting up multiple streams using the FLME and different sources?
thanks,Hi,
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Is this what you meant? -
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I am getting a SocketException when a Java applet talks to our
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have seen similar problems in this group, though, although the stack
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call stack from the Java plug-in console, though. Any ideas would be
greatly appreciated.
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at java.io.BufferedInputStream.read(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
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at org.xxxx.data.DataMediator.getDataNode(DataMediator.java:46)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
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URLConnection con = null;
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out.flush();
out.close();
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out.close();
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in.close();
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if( out != null ){
out.close();
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Tangosol, Inc.
http://www.tangosol.com/coherence.jsp
Tangosol Coherence: Clustered Replicated Cache for Weblogic
"Keith Patrick" <[email protected]> wrote in message
news:[email protected]...
I'm getting the exception on the client, which is an XP machine, while
the server is Win2K. I can't recall which, but either the applet or
the server runs 1.3x while the other runs 1.4. I discounted that
factor, though, as the problem only occurs on one site, which on all
others it works fine.
"Cameron Purdy" <[email protected]> wrote in message
news:<[email protected]>...
Exception is in the applet or on the server?
Would one of those by any chance be running on W2K with JDK 131_01 orolder?
>>
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com/coherence.jsp
Tangosol Coherence: Clustered Replicated Cache for Weblogic
"Keith Patrick" <[email protected]> wrote in message
news:[email protected]...
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several hundred seconds, so I am not quite seeing where the connection
is being reset. To be honest, I really don't know if it is WL that is
killing the connection, as nothing abnormal shows up in the WL log. I
have seen similar problems in this group, though, although the stack
traces never follow the same path mine does. I do have the following
call stack from the Java plug-in console, though. Any ideas would be
greatly appreciated.
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at java.net.SocketInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at
sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderFields(Unknown
Source)
atsun.plugin.net.protocol.http.HttpURLConnection.checkCookieHeader(Unknown
Source)
atsun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at org.xxxx.abstracts.Controller.sendRequest(Controller.java:39)
at org.xxxx.data.DataMediator.getDataNode(DataMediator.java:46)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Also, here is my code, although I can't see anything on the client
side that seems off:
public Object sendRequest( Object request, URL receiver ) throws
Exception{
Object response = null;
URLConnection con = null;
ObjectOutputStream out = null;
ObjectInputStream in = null;
try {
con = receiver.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setDefaultUseCaches(false);
con.setAllowUserInteraction(false);
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out.writeObject(request);
out.flush();
out.close();
in = new ObjectInputStream(con.getInputStream());
response = in.readObject();
in.close();
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if( out != null ){
out.close();
if( in != null ){
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if( in != null ){
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Improving multiple streams, Apple TV streaming?
Anyone have a time capsule and experience a lot of stuttering with streaming files to appletv? I replaced my time capsule with my dlink router and this works much better, one stutter compared to 20 with the time capsule in a given time (this is with a wired connection). I like my time capsule too, does anyone know of a fix or how to improve QOL (multiple streams etc)?
Thanks
MoSince the Apple TV is not equipped with Gigabit-Ethernet ports you can expect the best streaming performance if you have both the Time Capsule (TC) and Apple TV running in the "802.11n only (5 GHz)" radio mode. Next best would be to have them connected via 100 Mb Ethernet. Anything less than these would challenge anything above SD video.
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JDBC Connection reset by peer: JVM_recv in socket input stream read
Hey Guys,
Has anyone seen this issue? We get this error in our Weblogic app logs at times and no one is able to login to our application. Our database server and SQL server seem fine at a high level. Any ideas what is causing this?
com.s1.arch.persistence.exception.PersistenceException weblogic.jdbc.mssqlserver4.TdsException: I/O exception while talking to the server, java.net.SocketException: Connection reset by peer: JVM_recv in socket input stream read
Thanksplease make sure that there is no Firewall between your servers and DB server. this message usually happen when there is a fire wall between the servers. if yes please make sure that the connection time on fire wall is longer than the time needed to complete an operation another thing that you need to check if you have a fire wall which is to make sure that Oracle DBMS return the request to the same port that it is listening to (1521 default).
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Jon,
I believe that this error is similar to a "connection reset by peer". It is
a Window specific error. I believe it indicates that something has happened
on the other end of the socket such that the socket has gone bad.
I think that this should only occur when people reset their connection
before the reply is sent. I don't believe that it is indicative of any
serious problem other than this communication failure caused by the client.
I've opened an issue to catch and squelch these spurious exceptions rather
than logging them. For now I think it is safe to ignore them.
Regards,
Adam
"Jon Mountjoy" <[email protected]> wrote in message
news:[email protected]...
Hi Guys,
Using weblogic 5.1 (downloaded pretty soon after announcement) on windows
2000 (yes I know not certified there yet) and using jdk1.2.2-001.
I have a pretty standard setup - a connection pool (5) to a sqlserver
(remote) machine.
A pretty standard multithreaded servlet - grabs a connection, does aselect,
calls dbkona to dump output, releases connection.
It runs fine - browser returns result. When I push 'reload' on browser,say
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java.net.SocketException: ReadFile on fd=1912 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled
Code)
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accepting connecti on java.net.SocketException: Connection reset by peer:
JVM_recv in socket input stream read
Now I can get rid of (1) by switching off native IO!! This also stoppedIO
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I have changed nothing else in the properties.
(1) sounds like I may need to up the number of file descriptors open?
(2) I don't know. Is my server too loaded? I am running on a 600Mhzusing
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Regards,
Jon
More substantial excerpts:
Mon May 08 13:40:42 GMT+00:00 2000:<D> <ListenThread> Problem accepting
connection
java.net.SocketException: Connection reset by peer: JVM_recv in socketinput
stream read
at java.net.SocketInputStream.socketRead(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java, Compiled Code)
at weblogic.socket.ResettableSocket.getPrefix(ResettableSocket.java,
Compiled Code)
at weblogic.socket.JVMSocketT3.claimSocket(JVMSocketT3.java, CompiledCode)
at weblogic.socket.JVMSocketT3.claimSocket(JVMSocketT3.java, CompiledCode)
at weblogic.socket.JVMSocketManager.accept(JVMSocketManager.java,Compiled
Code)
at
weblogic.t3.srvr.ListenThread$RJVMListenRequest.execute(ListenThread.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Mon May 08 13:35:31 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1980 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Mon May 08 13:35:31 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1760 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Mon May 08 13:35:31 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1908 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)We are seeing the same error since switching to sp11 (we had been using
sp10). Haven't seen it in Solaris though. What is causing it?
Wed May 08 12:01:48 EDT 2002:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=3640 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java:259)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java:178)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:280)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129)
"John Slaman" <[email protected]> wrote in message
news:[email protected]..
>
I'm getting a error as follows:
Mon Apr 22 19:04:10 EDT 2002:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=2368 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
I have no idea as to the cause. It's been posted in the archives before -but with
no particular solution.
I'm using WLS 5.1 SP11, JDK 1.2.2_007. Win2000.
Does anybody know the cause/solution?
Thanks.
"Jon Mountjoy" <[email protected]> wrote:
Hi,
I have noticed that applying the service pack helps things quite a bit.
I no longer get NT muxer errors etc etc. just the "connection reset by
peer"
every now and again.
As I am repeatedly hitting the server from one browser, your 'connection
going bad' scenario probably
applies quite well.
(btw. before the SP, the errors seemed to crop up more just before/during
a
GC.)
Jon -
Connection Failure: ReadFile on fd=1231 failed with err=64 + JVM_recv in socket input stream read
Hi Guys,
Using weblogic 5.1 (downloaded pretty soon after announcement) on windows
2000 (yes I know not certified there yet) and using jdk1.2.2-001.
I have a pretty standard setup - a connection pool (5) to a sqlserver
(remote) machine.
A pretty standard multithreaded servlet - grabs a connection, does a select,
calls dbkona to dump output, releases connection.
It runs fine - browser returns result. When I push 'reload' on browser, say
10 times very quickly, I get the following errors. It is sometimes a
combination of these:
1- Mon May 08 13:34:41 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1912 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled
Code)
2- Mon May 08 13:40:42 GMT+00:00 2000:<D> <ListenThread> Problem
accepting connecti on java.net.SocketException: Connection reset by peer:
JVM_recv in socket input stream read
Now I can get rid of (1) by switching off native IO!! This also stopped IO
exceptions that were being raised by the servlet when it tried to output to
the output stream. (2) persists.
I have changed nothing else in the properties.
(1) sounds like I may need to up the number of file descriptors open?
(2) I don't know. Is my server too loaded? I am running on a 600Mhz using
64Mb heap for the server with 300Mb swap available...
Regards,
Jon
More substantial excerpts:
Mon May 08 13:40:42 GMT+00:00 2000:<D> <ListenThread> Problem accepting
connection
java.net.SocketException: Connection reset by peer: JVM_recv in socket input
stream read
at java.net.SocketInputStream.socketRead(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java, Compiled Code)
at weblogic.socket.ResettableSocket.getPrefix(ResettableSocket.java,
Compiled Code)
at weblogic.socket.JVMSocketT3.claimSocket(JVMSocketT3.java, Compiled Code)
at weblogic.socket.JVMSocketT3.claimSocket(JVMSocketT3.java, Compiled Code)
at weblogic.socket.JVMSocketManager.accept(JVMSocketManager.java, Compiled
Code)
at
weblogic.t3.srvr.ListenThread$RJVMListenRequest.execute(ListenThread.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Mon May 08 13:35:31 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1980 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Mon May 08 13:35:31 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1760 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Mon May 08 13:35:31 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1908 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)I have exactly the same problem running on Windows NT 4.0 (SP4) Weblogic 5.1 and
JDK1.2.2-001.
java.net.SocketException: ReadFile on fd=1048 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java, Compiled
Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java, Compiled
Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Jon Mountjoy wrote:
Hi Guys,
Using weblogic 5.1 (downloaded pretty soon after announcement) on windows
2000 (yes I know not certified there yet) and using jdk1.2.2-001.
I have a pretty standard setup - a connection pool (5) to a sqlserver
(remote) machine.
A pretty standard multithreaded servlet - grabs a connection, does a select,
calls dbkona to dump output, releases connection.
It runs fine - browser returns result. When I push 'reload' on browser, say
10 times very quickly, I get the following errors. It is sometimes a
combination of these:
1- Mon May 08 13:34:41 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1912 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled
Code)
2- Mon May 08 13:40:42 GMT+00:00 2000:<D> <ListenThread> Problem
accepting connecti on java.net.SocketException: Connection reset by peer:
JVM_recv in socket input stream read
Now I can get rid of (1) by switching off native IO!! This also stopped IO
exceptions that were being raised by the servlet when it tried to output to
the output stream. (2) persists.
I have changed nothing else in the properties.
(1) sounds like I may need to up the number of file descriptors open?
(2) I don't know. Is my server too loaded? I am running on a 600Mhz using
64Mb heap for the server with 300Mb swap available...
Regards,
Jon
More substantial excerpts:
Mon May 08 13:40:42 GMT+00:00 2000:<D> <ListenThread> Problem accepting
connection
java.net.SocketException: Connection reset by peer: JVM_recv in socket input
stream read
at java.net.SocketInputStream.socketRead(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java, Compiled Code)
at weblogic.socket.ResettableSocket.getPrefix(ResettableSocket.java,
Compiled Code)
at weblogic.socket.JVMSocketT3.claimSocket(JVMSocketT3.java, Compiled Code)
at weblogic.socket.JVMSocketT3.claimSocket(JVMSocketT3.java, Compiled Code)
at weblogic.socket.JVMSocketManager.accept(JVMSocketManager.java, Compiled
Code)
at
weblogic.t3.srvr.ListenThread$RJVMListenRequest.execute(ListenThread.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Mon May 08 13:35:31 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1980 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Mon May 08 13:35:31 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1760 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)
Mon May 08 13:35:31 GMT+00:00 2000:<E> <HTTP> Connection failure
java.net.SocketException: ReadFile on fd=1908 failed with err=64
at weblogic.socket.NTSocketMuxer.initiateIO(Native Method)
at weblogic.socket.NTSocketMuxer.read(NTSocketMuxer.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.requeue(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java,
Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code) -
Io exception: Connection reset by peer: JVM_recv in socket input stream read
We are developing a new J2EE app using JDev, OC4J, servlets, and EJBs. We have determined that our firewall is closing database connections that have been idle for 1 hour. This is a security requirement that cannot be changed. When we try to use these idle connections in both stateless and entity beans, we consistently receive this or a similar error message:
"ServletSACategoryList: Error invoking EJB procedure. Exception: java.sql.SQLException: StatelessSysAdminBean::getCategoryList - Io exception: Connection reset by peer: JVM_recv in socket input stream read "
Environment:
Oracle 9iAS 9.0.2.0.0
Database: Oracle 8.1.7
JDBC 8.1.7
JDK 1.3
JDev 9.0.2.829
We are using the ejb-location attribute within data-sources.xml for JNDI lookup of the DataSource. Here is what this file looks like:
<data-sources>
<data-source
class="oracle.jdbc.pool.OracleDataSource"
name="jdbc/OracleDS"
location="jdbc/OracleCoreDS"
xa-location="jdbc/xa/OracleXADS"
ejb-location="jdbc/OraclePoolDS"
url="jdbc:oracle:thin:@###.###.#.###:1521:dev1"
connection-driver="oracle.jdbc.driver.OracleDriver"
username="????????"
password="????????"
max-connections="4"
wait-timeout="20"
min-connections="1"
inactivity-timeout="60"
connection-retry-interval="1"
max-connect-attempts="3"
/>
</data-sources>
After calling getConnection() on the Connection object in my stateless bean, I have tried checking if the Connection object is null or isClosed(), I have caught any Exception, and looped to try again, but nothing has worked.
Please respond to [email protected] or directly to this post if you can help in any way.
Thank you,
- RobHi Robert,
If you don't mind, I can only offer a few suggestions for things
to try -- I'm afraid I don't have a solution for you. Of-course,
you may have already tried these things, so please excuse me if
this is the case.
Firstly, your "data-sources.xml" file looks "different". Have
you read the "Data Sources" chapter of the "Oracle9iAS Containers
for J2EE Services Guide, Release 2 (9.0.2)"? It is accessible
from here:
http://otn.oracle.com/docs/products/ias/doc_library/90200doc_otn/web.902/a95879/ds.htm#1004903
Also, have you tried running OC4J in "debug" mode? This web
page has more details:
http://kb.atlassian.com/content/atlassian/howto/orionproperties.jsp
I get the impression from the information you have supplied,
that you may not be explicitly closing your database connections
in your code. It looks to me like you are obtaining a database
connection in your session bean, and then keeping it for the
lifetime of that bean. Is that correct? I think it's better
to obtain a connection when you need to interact with the database,
and then close the connection immediately after completing the
interaction with the database (but that's just my opinion).
Lastly, if you haven't already discovered them, these web sites
may also be of help:
http://www.orionserver.com
http://www.orionsupport.com
http://www.elephantwalker.com
Hope this helps you.
Good Luck,
Avi.
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