Dear Mr or Mrs:
First of all, it's a great honor to subscribe to dubbo, and I'm sorry
to disturb you at such a time.Sorry for my awkward English. Here are some
questions I would like to ask:
Let me first describe the scenario: dubbo 2.7.3
auto-configuration(version 2.7.3 has already included Dubbo-all
dependency),registry: zookeeper(curator) , meta-data-registry - Redis (One
thing worth noted is that the official website’s documentation doesn’t include
the English version user guide for meta-data-report column, but the Chinese
version include it.However, the Chinese version doesn’t update the Redis and
zookeeper configuration tutorial information in this meta-data-report column)
run on Spring-boot 2.x
The first question is about the Redis meta-data-report: No matter how I
change the properties concerning with the meta-data-report, the Redis doesn’t
update the new info.For example, we use the default configuration value, that
is
“dubbo.metadata-report.address=redis://127.0.0.1:xxxx
dubbo.metadata-report.retry-times=100 ##default值100
dubbo.metadata-report.retry-period=3000 ##default值3000
dubbo.metadata-report.cycle-report=true ##default值true”
In fact, the provider(Assumed it is the property of one provider A), the
interesting thing is that no matter what I did to the Redis, for example,
change the value which is what the provider A’key corresponds to, or delete
the value of the provider A .It didn’t change as time goes by. Theoretically,
it should be updated or restored due to the mechanism of the “cycle-report” and
“retry-period”. But the meta-data do imported to Redis when the provider was
started.
The next question is about the significance of the properties concerning with
the “metadata-report”. As we all know, the meta-data contains some “useless”
data” which have no influence on the operation of dubbo. So why do we still
store them in the meta-data registry? I want to know the consequence if we
just totally ignore these meta-data.Can dubbo still run smoothly? What defect
will be triggered?
Developer: YufeiZheng,China
