java.net.SocketException: Cannot allocate memory

[Alan Bateman]

On 05/07/2013 18:20, Brian Call wrote:
> Hi Guys,
>
> I'm seeing an ugly issue crop up on JDK7 for MacOS that I'm at a total loss to diagnose or even begin to fix. At random times (and sometimes every time) I'm seeing this exception:
>
> Caused by: java.net.SocketException: Cannot allocate memory
> 	at sun.nio.ch.Net.joinOrDrop4(Native Method)
> 	at sun.nio.ch.Net.join4(Net.java:421)
> 	at sun.nio.ch.DatagramChannelImpl.innerJoin(DatagramChannelImpl.java:848)
> 	at sun.nio.ch.DatagramChannelImpl.join(DatagramChannelImpl.java:866)
> 	at org.jboss.netty.channel.socket.nio.NioDatagramChannel.joinGroup(NioDatagramChannel.java:158)
> 	at org.jboss.netty.channel.socket.nio.NioDatagramChannel.joinGroup(NioDatagramChannel.java:135)
> 	at com.soterawireless.h1s.groups.NioGroupSubscriber.joinGroup(NioGroupSubscriber.java:203)
> 	... 5 more
>
> This same codes works great on both Linux and Windows but fails intermittently on Mac OS 10.8.x. Google is letting me down and stackoverflow isn't being very helpful either...
>
> Does anyone have any insight on what might be causing this join group call to fail in such a manner? I could very easily write a simple test driver to demonstrate the problem so please let me know if that would be helpful.
>
I haven't seen this but I'm curious as to how many multicast groups are 
involved and whether you are dropping membership when done (not leaking 
I mean). I ask because there is typically a limit to how much filtering 
can be done on the NIC and once it goes past that limit then it has to 
be switched to promiscuous mode. I don't know the Mach / OS X kernel to 
know what is actually going here but mentioning limits in case there is 
a resource issue.

-Alan