I am running JDK 1.2.2 under AIX 4.3.3. TestSocket.java terminates normally
with the SocketException.
I can believe it is an AIX and/or JDK issue (it would not be the first).
But I fail to understand why my connection test program terminates normally
when running against SwiftMQ 2.1.1, but not when running against 2.1.2. If
it's an AIX or JDK problem, shouldn't I expect to see the same behavior
under 2.1.1 and 2.1.2?
Geoffrey A. Lowney
Senior Software Development Engineer
Recreational Equipment, Inc.
Phone 253-395-8164 Fax 253-437-7291
Pager 206-625-8477 [EMAIL PROTECTED]
[EMAIL PROTECTED] http://www.rei.com/
In order to draw a limit to thinking, we should have to think both sides
of this limit.
-- Ludwig Wittgenstein, Tractatus Logico-Philosophicus
> -----Original Message-----
> From: Andreas Mueller [mailto:[EMAIL PROTECTED]]
> Sent: Monday, July 02, 2001 12:12 PM
> To: [EMAIL PROTECTED]
> Subject: [developers] progarm hangs under 2.1.2
>
>
> I ran it here on a E450 with Solaris 2.6, JDK 1.3.0 hotspot. The
> TestSocket.java terminates normally with a SocketException.
> However, a
> JMS client against a 2.1.2 router terminates normally as well
> (samples/router_network/P2PSender, you must start smqr1 & 2
> before). So
> it seems a Linux & AIX problem (are you running AIX?).
>
> May be it works when you upgrade to JDK 1.3.
>
> --
> Andreas Mueller, IIT GmbH, Bremen/Germany, http://www.iit.de
> SwiftMQ - JMS Enterprise Messaging System, http://www.swiftmq.com
>
>
> -----Original Message-----
> From: Geoffrey Lowney <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Date: Mon, 2 Jul 2001 17:28:10 +0200
> Subject: [developers] progarm hangs under 2.1.2
>
> > When I run this test program, the reader does not hang. It
> receives a
> > SocketException. I see the following output:
> >
> > $ javac TestSocket.java
> > $ java -cp . TestSocket localhost 23
> > sleeping
> > before read
> > after read
> > before read
> > after read
> > before read
> > after read
> > before read
> > after read
> > before read
> > after read
> > before read
> > after read
> > before read
> > closing socket
> > closing socket done
> > java.net.SocketException: socket closed: A file descriptor does not
> > refer
> > to an open file.
> > at java.net.SocketInputStream.socketRead(Native Method)
> > at
> java.net.SocketInputStream.read(SocketInputStream.java:98)
> > at
> java.net.SocketInputStream.read(SocketInputStream.java:115)
> > at TestSocket$1.run(TestSocket.java:21)
> >
> > Also, I do not see the same behavior in 2.1.1 and 2.1.2.
> My programs
> > do not
> > hang under 2.1.1.
> >
> > Is there any way to verify the socket.close() is being called by
> > connection.close() as expected?
> >
> > Geoffrey A. Lowney
> > Senior Software Development Engineer
> > Recreational Equipment, Inc.
> > Phone 253-395-8164 Fax 253-437-7291
> > Pager 206-625-8477 [EMAIL PROTECTED]
> > [EMAIL PROTECTED] http://www.rei.com/
> > In order to draw a limit to thinking, we should have to think both
> > sides
> > of this limit.
> > -- Ludwig Wittgenstein, Tractatus Logico-Philosophicus
> >
> >
> >
> > > -----Original Message-----
> > > From: Andreas Mueller [mailto:[EMAIL PROTECTED]]
> > > Sent: Saturday, June 30, 2001 6:10 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: [developers] progarm hangs under 2.1.2
> > >
> > >
> > >
> > > > The 2.1.1 has exactly the same behavior here. The reader
> > > thread stucks
> > > > at
> > > > read even after socket.close(). After about 1 minute the
> > > read returns
> > > > without any exception and the program then terminates properly.
> > I'll
> > > > try
> > > > to solve it today and will eventually deploy 2.1.2 again.
> > >
> > > Well, I've tested it here with all possible combinations, incl.
> > > interrupting the reader thread. It has no effect. The
> reader hangs on
> > > read.
> > >
> > > This is NOT a SwiftMQ issue but probably a JDK platform
> problem. I've
> > > attached a very simple testdriver to test it. It produces
> > > exactly the same
> > > behavior. It creates a socket, starts a thread to read
> from the input
> > > stream, sleeps 1s, and closes the socket. The reader hangs.
> > > Just try it
> > > with java -cp . TestSocket localhost 23. This is the telnet port.
> > > Strange wise: if I ctrl/z the hanging program and put it in
> > > the foreground
> > > again with "fg", it terminates properly with a socket exception.
> > >
> > > There must be something wrong with the signaling of the JVM.
> > > A SwiftMQ
> > > clients exits after about 60s, because the keepalive interval
> > > is 60'000.
> > > The timer is definitively destroyed at the client (I've
> > > checked it!). But
> > > the router sends a message in this interval. This might cause
> > > a signal at
> > > the client socket which results in termination. If you set
> > > the keepalive
> > > interval to 10s, the client terminates after 10s.
> > >
> > > So, for you, a workaround could be:
> > >
> > > - use 1.3.0 or better with -classic at your client
> > > - try 1.2.2 with -native
> > > - simply use System.exit at your client
> > > - use a keepalive interval of 1000 (1s) for the JMS listener
> > >
> > > I don't found a bug in the bug database of JavaSoft. So I can
> > > do simply
> > > nothing on this issue. If someone has an idea, please tell me.
> > >
> > > --
> > > Andreas Mueller, IIT GmbH, Bremen/Germany, http://www.iit.de
> > > SwiftMQ - JMS Enterprise Messaging System, http://www.swiftmq.com
> > >
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> > >
> >
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