In 2.1 we've decided to switch to [`pooled-jms`](https://github.com/messaginghub/pooled-jms) as the pool implementation we use is not JMS 2 compliant. Some properties are no longer supported with some more details [in this issue](https://github.com/messaginghub/pooled-jms/issues/12#issuecomment-409164758). We should deprecate those and add a note in the doc that the current pool implementation is not JMS 2 compliant. See also #13927