不支持。Pulsar 按照时间来进行退避重试策略，和重试次数机制类似。客户端内部的重试策略是用的退避（backoff）机制，可以配置 ClientBuilder 的 backoff 参数来控制。
/**
* Set the duration of time for a backoff interval.
*
* @param duration the duration of the interval
* @param unit the time unit in which the duration is defined
* @return the client builder instance
*/
ClientBuilder startingBackoffInterval(long duration, TimeUnit unit);
/**
* Set the maximum duration of time for a backoff interval.
*
* @param duration the duration of the interval
* @param unit the time unit in which the duration is defined
* @return the client builder instance
*/
ClientBuilder maxBackoffInterval(long duration, TimeUnit unit);
从生产者的角度，可以在 ProducerBuilder 中配置总的 send timeout。
/**
* Set the send timeout <i>(default: 30 seconds)</i>.
*
* <p>If a message is not acknowledged by the server before the sendTimeout expires, an error will be reported.
*
* <p>Setting the timeout to zero, for example {@code setTimeout(0, TimeUnit.SECONDS)} will set the timeout
* to infinity, which can be useful when using Pulsar's message deduplication feature, since the client
* library will retry forever to publish a message. No errors will be propagated back to the application.
*
* @param sendTimeout
* the send timeout
* @param unit
* the time unit of the {@code sendTimeout}
* @return the producer builder instance
*/
ProducerBuilder<T> sendTimeout(int sendTimeout, TimeUnit unit)