When you have multiple JBoss AS instances installed with Teiid and clustered, do want use this setup to make Teiid highly available? Then there are 2 solutions 1) Add the multiple host:port combination in the JDBC connection URL. See Client Developer's Guide. http://docs.jboss.org/teiid/7.3.0.Final/client-developers-guide/en-US/htm... 2) You can do software based external cluster configuration using HAProxy, see this blog post http://goo.gl/IPzU1 Thank you Jermy for pointing this out and writing an excellent article with details. Thanks Ramesh..