RabbitMQ 3.6.2 queue state show "idle" when incoming and deliver speed are non-zero

[zhenbo zeng]

When running rabbitmq 3.6.2, the web management ui show that some queues state are "idle", but the incoming and deliver speed are non-zero.

Is that a bug with the management plugin?

[Michael Klishin]

It's not. Queue "state" is normally a reflection of the queue Erlang process state,

which can go in and out of idle many times a second as runtime scheduler gives

it a slice of time to run and unschedules it.

Management stats are emitted once every 5 seconds by default. That's not particularly high

resolution for capturing something that happens many times a second.

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MK

Staff Software Engineer, Pivotal/RabbitMQ

[zhenbo zeng]

<acronym class="normal" title="Idle since 2016-05-27 1:40:50">idle</acronym>

$ date -R
Fri, 27 May 2016 09:44:48 +0800

There is a "idle since" time, but it is not the local time.

在 2016年5月26日星期四 UTC+8下午8:16:34，Michael Klishin写道：

[zhenbo zeng]

format_queue_stats({idle_since, Value}) ->
    [{idle_since, now_to_str(Value)}];



format_channel_stats({idle_since, Value}) ->
    {idle_since, now_to_str(Value)};



now_to_str(MilliSeconds) ->
    BaseDate = calendar:datetime_to_gregorian_seconds({{1970, 1, 1},
                                                       {0, 0, 0}}),
    Seconds = BaseDate + (MilliSeconds div 1000),
    {{Y, M, D}, {H, Min, S}} = calendar:gregorian_seconds_to_datetime(Seconds),
    print("~w-~2.2.0w-~2.2.0w ~w:~2.2.0w:~2.2.0w", [Y, M, D, H, Min, S]).

rabbit_mgmt_format.erl format the "idle since" time, I think now_to_str/1 should call calendar:universal_time_to_local_time/2 before print/2, converts to local time.



在 2016年5月26日星期四 UTC+8下午8:06:19，zhenbo zeng写道：

[Michael Klishin]

Please file an issue on GH or submit a pull request against the stable branch.

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[Michael Klishin]

FTR, here's the issue:

https://github.com/rabbitmq/rabbitmq-management/issues/213

It makes no sense to change server time to be local. The browser should do the formatting.