We've been running some tests with NBST and overcame initial weirdnesses with the HTTP session replication stress test, mainly around config issues (not using MVCC, not using STREAMING_STATE_TRANSFER in JGroups).  These are now tested for in the JBC configs.

Anyway, the latest run went somewhat well, in that the basic state transfer worked.  The test involved async replication, with 4 nodes.  Here is what happened:

1.  4 nodes started.  State transferred accordingly, no problems.

2.  Load applied to all servers via a load balancer.

3.  Node 4 killed.

4.  Node 3 killed.

5.  Node 2 was observed to throw an OOM at this point.

Examining what happened on Node 2 at this stage, stay tuned for more info.

Cheers