In such cases, SRs will continue to fail for sitting on those hosts. Inorder to indicate to Bluecloud that a particular host must be skipped, set the "ignored-by-resource-broker" property to "true" for that host. This can be set from Maximo UI. Goto -> Service Automation -> Cloud Server Pool Administration. Select the required pool. From the Resource Pool Configuration tab, Goto the Resource Pool. Here you will be able to see the hosts included in this pool. For ever host to be ignored, check the "Is Failed" flag.
Also published at: http://www.cubicrace.com/2014/03/why-tsam-continues-to-select-host-for.html