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Posted to rpc-user@xml.apache.org by Brian Dobby <bd...@nobilis.com> on 2002/06/24 12:50:51 UTC
RE: NullPointerException on server close (solved)
Hi, folks.
I found the problem: I was calling 'start' on the WebServer, and this
method is called internally to start the thread. Thus two threads were
sharing the same WebServer instance; no wonder it didn't work! Maybe a
note in the doc would help avoid other newbies falling for this one?
Thanks
Brian
-----Original Message-----
From: Brian Dobby
Sent: Fri 6/21/2002 7:31 AM
To: rpc-user@xml.apache.org
Cc:
Subject: NullPointerException on server close
Hi, I'm just trying xmlrpc for the first time. I'm impressed with its
ease of use, but I do have one problem with it; I always get a null
pointer exception reported when the WebServer closes, and this doesn't
look good in a production system.
I create the WebServer like this:
myserver = new WebServer(m_apiPort);
myserver.addHandler("MyRPC", myClass);
myserver.start();
I stop it like this:
myserver.removeHandler("MyRPC");
myserver.shutdown();
I get this at the console:
Closing XML-RPC server socket.
Exception in XML-RPC listener loop (java.net.SocketException: Socket
closed).
Closing XML-RPC server socket.
Hit uncaught exception java.lang.NullPointerException
java.lang.NullPointerException
at org.apache.xmlrpc.WebServer.run(WebServer.java)
at java.lang.Thread.run(Thread.java:484)
This happens whether or not I actually run a client. I'm running with
JDK 1.3 under Windows 2000 Server. Does anyone know what I'm doing
wrong?
TIA
Brian
Re: NullPointerException on server close (solved)
Posted by Daniel Rall <dl...@finemaltcoding.com>.
Jason van Zyl will be removing the implicit start() for the next
release of XML-RPC. Ought to obviate the need for any special
documentation.
- Dan
"Brian Dobby" <bd...@nobilis.com> writes:
> I found the problem: I was calling 'start' on the WebServer, and this
> method is called internally to start the thread. Thus two threads were
> sharing the same WebServer instance; no wonder it didn't work! Maybe a
> note in the doc would help avoid other newbies falling for this one?
>
> -----Original Message-----
> From: Brian Dobby
> Sent: Fri 6/21/2002 7:31 AM
> To: rpc-user@xml.apache.org
> Cc:
> Subject: NullPointerException on server close
> Hi, I'm just trying xmlrpc for the first time. I'm impressed with its
> ease of use, but I do have one problem with it; I always get a null
> pointer exception reported when the WebServer closes, and this doesn't
> look good in a production system.
>
> I create the WebServer like this:
> myserver = new WebServer(m_apiPort);
> myserver.addHandler("MyRPC", myClass);
> myserver.start();
>
> I stop it like this:
> myserver.removeHandler("MyRPC");
> myserver.shutdown();
>
> I get this at the console:
> Closing XML-RPC server socket.
> Exception in XML-RPC listener loop (java.net.SocketException: Socket
> closed).
> Closing XML-RPC server socket.
> Hit uncaught exception java.lang.NullPointerException
> java.lang.NullPointerException
> at org.apache.xmlrpc.WebServer.run(WebServer.java)
> at java.lang.Thread.run(Thread.java:484)
>
> This happens whether or not I actually run a client. I'm running with
> JDK 1.3 under Windows 2000 Server. Does anyone know what I'm doing
> wrong?
>
> TIA
> Brian
Re: NullPointerException on server close (solved)
Posted by Daniel Rall <dl...@finemaltcoding.com>.
Jason van Zyl will be removing the implicit start() for the next
release of XML-RPC. Ought to obviate the need for any special
documentation.
- Dan
"Brian Dobby" <bd...@nobilis.com> writes:
> I found the problem: I was calling 'start' on the WebServer, and this
> method is called internally to start the thread. Thus two threads were
> sharing the same WebServer instance; no wonder it didn't work! Maybe a
> note in the doc would help avoid other newbies falling for this one?
>
> -----Original Message-----
> From: Brian Dobby
> Sent: Fri 6/21/2002 7:31 AM
> To: rpc-user@xml.apache.org
> Cc:
> Subject: NullPointerException on server close
> Hi, I'm just trying xmlrpc for the first time. I'm impressed with its
> ease of use, but I do have one problem with it; I always get a null
> pointer exception reported when the WebServer closes, and this doesn't
> look good in a production system.
>
> I create the WebServer like this:
> myserver = new WebServer(m_apiPort);
> myserver.addHandler("MyRPC", myClass);
> myserver.start();
>
> I stop it like this:
> myserver.removeHandler("MyRPC");
> myserver.shutdown();
>
> I get this at the console:
> Closing XML-RPC server socket.
> Exception in XML-RPC listener loop (java.net.SocketException: Socket
> closed).
> Closing XML-RPC server socket.
> Hit uncaught exception java.lang.NullPointerException
> java.lang.NullPointerException
> at org.apache.xmlrpc.WebServer.run(WebServer.java)
> at java.lang.Thread.run(Thread.java:484)
>
> This happens whether or not I actually run a client. I'm running with
> JDK 1.3 under Windows 2000 Server. Does anyone know what I'm doing
> wrong?
>
> TIA
> Brian