Hi Yiwen,
IIRC, "EVENT LOST" messages will be output when the receiver application name
of the event
could not be found in "SERVICE_BRICKS" dictionary.
"SERVICE_BRICKS" stores the receiver application name to the event sender
application.
e.g.) simple_switch_13.py
SERVICE_BRICKS={'SimpleSwitch13': <simple_switch_13.SimpleSwitch13 object at
0x7f7885871400>,
'ofp_event': <ryu.controller.ofp_handler.OFPHandler object at 0x7f7885875128>}
This means "SimpleSwitch13" is a observer for the events generated by
"ofp_event".
FYI:
When I faced the same problem (I couldn't receive events at all though), I
could solve it
with adding the events into "_EVENTS" list in the event "sender" application.
https://github.com/osrg/ryu/blob/master/ryu/services/protocols/bgp/application.py#L180-L184
The following means "RyuBGPSpeaker" will generate "EventBestPathChanged",
"EventPeerDown"
and "EventPeerUp" for the observer applications.
Thanks,
Iwase
On 2017年02月13日 13:59, Yiwen Shen wrote:
> Hi,
>
> Yes I mean the debug log message that says EVENT LOST when I use the
> --verbose option.
>
> My code has a traffic request arrive and this causes events to be sent
> between different apps to handle this request. The issue I'm facing is that
> sometimes I get the event lost message so the code doesn't finish to the end,
> but other times it does. This means that the event handler works and the code
> is correct, but somehow something is causing the events to be lost
> occasionally. Now, if I have many events in succession, then there's a higher
> chance for the code to fail because one of the events gets lost.
>
> So I'm wondering if you might know anything like timing or some other reason
> that might cause this to happen. I'm running the code on an Ubuntu system,
> and also tried it on Cygwin.
>
> Thank you,
> Yiwen
>
> On Feb 12, 2017 11:01 PM, "Iwase Yusuke" <[email protected]
> <mailto:[email protected]>> wrote:
>
> Hi Yiwen,
>
> What does "lost" exactly mean?
>
> You mean:
> - Getting the following debug log message when some events occurred.
>
> https://github.com/osrg/ryu/blob/master/ryu/base/app_manager.py#L317-L318
> <https://github.com/osrg/ryu/blob/master/ryu/base/app_manager.py#L317-L318>
> - Your event handler was not called when interested events occurred.
> or else?
>
> Thanks,
> Iwase
>
>
> On 2017年02月11日 07:06, Yiwen Shen wrote:
> > Hi,
> >
> > In my system, I am using send_event to send events around some Ryu apps
> and each time I run it, sometimes the events succeed but most of the time one
> of the events are lost. I have tried using hub.sleep(1) at the beginning but
> it doesn't make it any better. 80% of the time the code cannot reach the end
> because one of the events are lost.
> >
> > Thank you,
> > Yiwen
> >
> >
> >
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