spring poller against jdbc backed queue channel - Clustered mode

Will a message get processed twice(meaning in more than 1 cluster node) in the below scenario? 1. A jdbc message store backed queue channel containing pending messages 2. Poller configured on the message consumer side to process messages

Does the jdbc message store lo开发者_StackOverflow社区ck messages once picked for processing to avoid the message being re-processed in another cluster?

discussed here http://forum.springsource.org/showthread.php?112446-spring-poller-against-jdbc-backed-queue-channel-Clustered-mode&highlight=poller