[rabbitmq-discuss] timestamp basic property looses milliseconds?

Thu Feb 23 11:12:36 GMT 2012

On Wed, Feb 22, 2012 at 20:04, Ken Baltrinic
<kbaltrinic at bericotechnologies.com> wrote:
> We are attempting to use the amqp basic property "timestamp" via the
> RabbitMQ java client (see code below) to record the point in time when
> the message gets sent.  However, we are finding that when a message is
> pulled from the bus, the timestamp property of the retrieve message
> has had its milliseconds component dropped.  We are using rabbitmq
> 2.7.1 with erlang R15B.  Is this a bug or by design? Other than using
> our own headers, is there a better way to do this?  We would love it
> if Rabbit itself would provide this timestamp as it would eliminate
> issues with client clocks not being in sync.

AMQP spec says:

> 4.2.5.4 Timestamps
> Time stamps are held in the 64-bit POSIX time_t format with an
> accuracy of one second. By using 64 bits we avoid future wraparound
> issues associated with 31-bit and 32-bit time_t values.

So, as far as you're using the built-in timestamp field, it will be
rounded to a second. Sorry.

Marek