Thanks for those. The query client log contains the following entry:
[fine 2013/02/07 15:41:12.766 EST <Query Executer> tid=0x1f] PoolImpl -starting pool with servers:
[STINKY2K8.carecorenational.com/10.50.30.29:10101]
The client gets servers for its pool from a locator, so this log entry indicates that the locator that the DataBrowser client connects to has STINKY2K8 in its membership as a cache server that is listening for client connections on the port 10101. Is it possible that there is a such cache server running on this host? I think we should take a look at the locator log file. Could you set the log level for the locator to fine as well?