Event time not being set when batching is disabled in producer

[sanketkhotebsft]

Expected behavior

The eventTime timestamp should be getting at the consumer side if its set at the time of producing the message

Actual behavior

after setting eventTime in the producer message, getting eventTime as 0 in the consumed message.

Steps to reproduce

Set
p.options.DisableBatching=true
and produce messages with eventTime:
msg := &pulsar.ProducerMessage{ EventTime: time.Now().UTC(), Payload: []byte(data) }

_, err = producer.Send(context.Background(), msg)

on the consumer side:
ts := msg.EventTime()

ts will get as a 1970-01-01 05:30:00 +0530 IST

in pulsar lib, we are adding eventTime to message metadata only when batching is enabled.

pulsar-client-go/pulsar/producer_partition.go

Line 750 in 9cc6ee0

smm.EventTime = proto.Uint64(internal.TimestampMillis(msg.EventTime))

System configuration

Pulsar version: 0.10.0