Hi,
I’m not sure if FailureMode.CANCEL means what you think. It is actually only used for memcached buckets, if you use couchbase buckets you should not mess with the FailureMode setting.
Also, can you please raise a JCBC bug ticket so we can investigate and follow up more closely? You can find the bugtracker here: http://www.couchbase.com/issues/browse/JCBC
Thanks,
Michael