Re: bind_addr different from mcast_recv_sock and mcast_send_sock

Looks like a bug in the JDK to me. Can you try with JDK 1.4 and 5 
nevertheless, just to see whether your network setup is correct ? If you 
have the same problem, then obviously it is not a JDK bug

Marco Sbodio wrote:
> On 7/29/06, Bela Ban <belaban@xxxxxxxxx> wrote:
>   
>> Marco Sbodio wrote:
>>     
>>> I've enabled trace for "org.jgroups" and I've tried to debug
>>> org.jgroups.protocols.UDP.createSockets(). I modified it adding some
>>> log as following:
>>>
>>> [[
>>> // 3. Create socket for receiving IP multicast packets
>>> if(ip_mcast) {
>>> // 3a. Create mcast receiver socket
>>> mcast_recv_sock=new MulticastSocket(mcast_port);
>>> mcast_recv_sock.setTimeToLive(ip_ttl);
>>> tmp_addr=InetAddress.getByName(mcast_addr_name);
>>> mcast_addr=new IpAddress(tmp_addr, mcast_port);
>>>
>>> if(bind_addr != null) {
>>> log.info("*** marcos ***" + bind_addr);
>>> mcast_recv_sock.setInterface(bind_addr);
>>> log.info("*** marcos ***" +
>>> mcast_recv_sock.getInterface().getHostAddress());
>>> }
>>> else {
>>> log.info("*** marcos *** else");
>>> }
>>>
>>> //...
>>> }
>>> ]]
>>>
>>> I use
>>>
>>> [[
>>> UDP(mcast_addr=228.8.8.8;bind_addr=192.168.1.2;mcast_port=45566;ip_ttl=32;mcast_send_buf_size=64000;mcast_recv_buf_size=64000)
>>> ]]
>>>
>>> and here is what I get in the log:
>>>
>>> [[
>>> 2005-06-19 12:28:42,256 [DownHandler (UDP)] INFO DownHandler (UDP)
>>> org.jgroups.protocols.UDP - *** marcos ***qbic/192.168.1.2
>>> 2005-06-19 12:28:42,364 [DownHandler (UDP)] INFO DownHandler (UDP)
>>> org.jgroups.protocols.UDP - *** marcos ***88.231.3.0
>>> ]]
>>>
>>> so it seems that "mcast_recv_sock.setInterface(bind_addr);" has no
>>> effect. Have you ever seen something like this before? Any ideas?
>>>       
>> Hmm, this is interesting, can you print just:
>> mcast_recv_sock.getInterface() ? Rather than
>> mcast_recv_sock.getInterface().getHostAddress() ?
>>
>> If setting the interface on a Multicast Socket doesn't work (btw: try
>> McastSocket.setNetworkInterface() to see if that works !), then this
>> looks like a bug in the JDK implementation for your OS. Have you
>> searched for that bug ?
>>
>>     
>
> (sorry for the late reply: I was out of office). I've tried
> mcast_recv_sock.getInterface() instead of
> mcast_recv_sock.getInterface().getHostAddress() and here is the
> result:
>
> [[
> [INFO] UDP - -*** marcos *** // QBIC-371AAF64/192.168.1.4
> [INFO] UDP - -*** marcos *** // 200.231.3.0/200.231.3.0
> ]]
>
> the above output is originated by:
>
> [[
> if(bind_addr != null) {
>   log.info("*** marcos *** // " + ind_addr);
>   mcast_recv_sock.setInterface(bind_addr);
>   log.info("*** marcos *** // " + mcast_recv_sock.getInterface());
> }
> ]]
>
> does this really look like a bug in the JVM we're using?
>
> thanks
> marcos
>
> p.s. I cannot thest McastSocket.setNetworkInterface() because that
> requires JDK 1.4+ and I have JDK 1.3.1
>
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>   

-- 
Bela Ban
Lead JGroups / Manager JBoss Clustering Group
JBoss - a division of Red Hat


-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642