(PECL zookeeper >= 0.1.0)
Zookeeper::isRecoverable — Checks if the current zookeeper connection state can be recovered
The application must close the handle and try to reconnect.
Returns true/false on success, and false on failure.
This method emits PHP error/warning when operation fails.
Since version 0.3.0, this method emits ZookeeperException and it's derivatives.