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Posted to dev@tomcat.apache.org by bu...@apache.org on 2007/10/17 16:58:51 UTC

DO NOT REPLY [Bug 43641] New: - Using the bind attribute for Membership tag causes Multicast to break

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           Summary: Using the bind attribute for Membership tag causes
                    Multicast to break
           Product: Tomcat 6
           Version: 6.0.14
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Cluster
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: rpluem@apache.org


Using the bind attribute for the Membership tag causes multicast to break. So
something like

   <Membership className="org.apache.catalina.tribes.membership.McastService"
               bind="123.123.123.123"
               address="228.0.0.4"
               port="45564"/>

causes a broken cluster.
The reason for this is that in the case that the bind parameter is set the 
MulticastSocket is bound to the multicast interface. This is wrong as it causes
the respective udp socket to be bound to this interface which stops multicast
from working (tested on Linux and Solaris). It can be tried to bind the
MulticastSocket to the multicast address itself. This does not work on all
platforms. In case it does not work it can be ignored silently and the
MulticastSocket only binds to the port. The attached patch fixes this.

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DO NOT REPLY [Bug 43641] - Using the bind attribute for Membership tag causes Multicast to break

Posted by bu...@apache.org.
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------- Additional Comments From fhanik@apache.org  2007-10-17 11:23 -------
(In reply to comment #3)
> OK, can we please add if(log.isInfoEnabled) before the log statements.
> 
no need, this is not a frequently called method

> I think also the after Exception the log level is warn and not info! User has
create
> a wrong configuration !
not at all, it is simple that on some OS' don't support binding to the multicast
address, and the bind exception is expected.


> 
> :-)
> Peter



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DO NOT REPLY [Bug 43641] - Using the bind attribute for Membership tag causes Multicast to break

Posted by bu...@apache.org.
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------- Additional Comments From pr@objektpark.de  2007-10-17 11:12 -------
OK, can we please add if(log.isInfoEnabled) before the log statements.

I think also the after Exception the log level is warn and not info! User has create
a wrong configuration !

:-)
Peter

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DO NOT REPLY [Bug 43641] - Using the bind attribute for Membership tag causes Multicast to break

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fhanik@apache.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #20995|0                           |1
        is obsolete|                            |




------- Additional Comments From fhanik@apache.org  2007-10-17 10:58 -------
Created an attachment (id=20999)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=20999&action=view)
Formatted patch


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DO NOT REPLY [Bug 43641] - Using the bind attribute for Membership tag causes Multicast to break

Posted by bu...@apache.org.
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fhanik@apache.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




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DO NOT REPLY [Bug 43641] - Using the bind attribute for Membership tag causes Multicast to break

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------- Additional Comments From rpluem@apache.org  2007-10-17 07:59 -------
Created an attachment (id=20995)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=20995&action=view)
Patch against 6.0.14


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