Hi all,
I think there is still a race condition when closing
DefaultUDPTransportMapping.
I think the race condition is when this code:
142: closingSocket.close();
143: }
144: socket = null;
is executed concurrently with:
334: while (!stop) {
here->335: DatagramPacket packet = new DatagramPacket(buf,
buf.length,
here->336:
udpAddress.getInetAddress(),
here->337:
udpAddress.getPort());
here->338: try {
here->339: try {
340: socket.receive(packet);
In order to produce the problem more frequently, just insert a
"Thread.yield()"
between lines 339 and 340. When the close() happens between the while(!stop)
test and the socket.receive(), the socket is null and throws a
NullPointerException.
Jean-Pierre Tosoni
Acksys R&D dept.
Re:
> [SNMP4J] NullPointerException when closing DefaultUDPTransportMapping
> Andy Coulbeck andrew.coulbeck at unboundid.com
> Mon May 24 17:17:26 CEST 2010
>
> It looks like there is a race condition in snmp4j-1.11
> DefaultUDPTransportMapping when closing the SNMP client
> session. Occasionally we see the following error.
> (snip)
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