Gluster users - Feb 2013 - adding a brick causes mountpoints to hang

Hello guys, 

I am having a bit of an issue with adding a new server to the glusterfs. I was
wondering if anyone could help me. I am running glusterfs 3.3.0 over rdma on
ubuntu 12.04 server.

Basically, I had a single glusterfs server that was used by two host servers for
running a bunch of vms. The host servers used nfs to mount the glusterfs mount
point. I've added a new server with the hope to replicate data. The server
was added fine and the clients could mount the mountpoint which had both
servers.

Following that I've ran "ls -laR /mountpoint" on the client side
to kick off the self heal process so that all the data is copied across to the
second server. Following a few seconds delay I started seeing file server
contents from the ls command. This lasted about 10 seconds after which point the
mountpoint froze on both clients. However, I can see data being copied to the
new storage server while the mountpoints were still hanging. I've waited
about two hours, but the mountpoints were still frozen.

Does anyone know what the problem could be? 

After about three hours I've had to stop the glusterfs service on the newly
introduced server as I had to turn on the infrastructure. After the service
stopped, the mountpoints came back and started working again.

I was wondering if it's possible to add new bricks without the client
mountpoint hangs? How can I find out what the problem is?

Many thanks 

Andrei 
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