[jboss-user] [Clustering/JBoss] - Re: JBoss Clustering + Windows NLB (Network Load Balancing)

[bstansberry@jboss.com]

We haven't had a lot of community input re usage of NLB, and we test with it or use it internal within the JBoss division, so that makes it somewhat a Not Good Idea since it will be harder to get community support. I don't have any real idea what your problem could be, only than I found a probably irrelevant post via google:

http://www.nabble.com/TCP-startup-problems-t563478.html

A quick glance at NLB docs make it look like its support for session affinity is not so hot. Also, it uses client addresses to pin users to a server. If your clients are sitting behind corporate firewalls, you could have a lot of users who appear to be using the same address.  They'll all get pinned to the same server.

Re: mod_jk vs. a hardware load balancer, the hardware load balancer is also a potential single point of failure (unless you get two, and you can always get 2 apache boxes as well).

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