RE: <service> start Generates email noise

[Aaron Scamehorn]

Hi Martin,

Actually I think you've now got one thread doing an ACTION_START, and
another doing an ACTION_RESTART on the exact same service.

It is the ACTION_RESTART that is generating what I perceived to be
extraneous emails. 

It looks like the do_wakeupcall that you added to
http/cervlet.c:handle_action() is the culprit.  Without it, I don't get
the ACTION_RESTART problem.

Of course you need this now, or else it takes Poll Time to actully
respond to the HTTP events, which is what you were trying to speed up in
the first place.

Here is the log output, with a bunch of extra messages, including
pthread_t.

3086927552 [CST Dec  1 14:53:25] debug    : 'data_dir' filesystem flags
has not changed since last cycle
3086927552 [CST Dec  1 14:53:25] debug    : 'data_dir' space usage check
passed [current space usage=10.6%]
3086924720 [CST Dec  1 14:53:26] info     : monit daemon at 24175
awakened
3086927552 [CST Dec  1 14:53:26] info     : Awakened by User defined
signal 1
3086927552 [CST Dec  1 14:53:26] debug    : control_service:
ACTION_START for 'LogClient'
3086927552 [CST Dec  1 14:53:26] debug    : control_service:
ACTION_START Util_isProcessRunning for 'LogClient'
3086927552 [CST Dec  1 14:53:26] debug    : 'LogClient' Error testing
process id [24220] -- No such process
3086927552 [CST Dec  1 14:53:26] debug    : do_start:
Util_isProcessRunning for 'LogClient'
3086927552 [CST Dec  1 14:53:26] debug    : 'LogClient' Error testing
process id [24220] -- No such process
3086927552 [CST Dec  1 14:53:26] info     : 'LogClient' start:
/cogcap/ccts/bin/logclnt
3086927552 [CST Dec  1 14:53:26] debug    : 'LogClient' Error testing
process id [24220] -- No such process
3086927552 [CST Dec  1 14:53:26] debug    : Monitoring enabled --
service LogClient
3086927552 [CST Dec  1 14:53:26] debug    : check_process: calling
Util_isProcessRunning for 'LogClient'
3086927552 [CST Dec  1 14:53:26] debug    : 'LogClient' Error testing
process id [24220] -- No such process
3086927552 [CST Dec  1 14:53:26] error    : 'LogClient' process is not
running
3086927552 [CST Dec  1 14:53:26] debug    : Does not exist notification
is NOT sent to address@hidden
3086927552 [CST Dec  1 14:53:26] debug    : Does not exist notification
is sent to address@hidden
3076434864 [CST Dec  1 14:53:26] debug    : static void* wait_start for
'LogClient'
3076434864 [CST Dec  1 14:53:26] debug    : 1) wait_start: calling
Util_isProcessRunning for 'LogClient', max_tries= 29
3076434864 [CST Dec  1 14:53:26] debug    : 'LogClient' Error testing
process id [24220] -- No such process
3086927552 [CST Dec  1 14:53:26] debug    : control_service:
ACTION_RESTART for 'LogClient'
3086927552 [CST Dec  1 14:53:26] info     : 'LogClient' trying to
restart
3086927552 [CST Dec  1 14:53:26] debug    : Monitoring disabled --
service LogClient (stop)
3086927552 [CST Dec  1 14:53:26] debug    : do_stop:
Util_isProcessRunning for 'LogClient'
3086927552 [CST Dec  1 14:53:26] debug    : 'LogClient' Error testing
process id [24220] -- No such process
3086927552 [CST Dec  1 14:53:26] debug    : 'data_dir' filesystem flags
has not changed since last cycle
3086927552 [CST Dec  1 14:53:26] debug    : 'data_dir' space usage check
passed [current space usage=10.6%]
3076434864 [CST Dec  1 14:53:27] debug    : 1) wait_start: calling
Util_isProcessRunning for 'LogClient', max_tries= 28
3076434864 [CST Dec  1 14:53:27] debug    : 2) wait_start: calling
Util_isProcessRunning for 'LogClient'
3086927552 [CST Dec  1 14:53:56] debug    : check_process: calling
Util_isProcessRunning for 'LogClient'
3086927552 [CST Dec  1 14:53:56] info     : 'LogClient' process is
running with pid 24375
3086927552 [CST Dec  1 14:53:56] debug    : Exists notification is NOT
sent to address@hidden
3086927552 [CST Dec  1 14:53:56] debug    : Exists notification is sent
to address@hidden
3086927552 [CST Dec  1 14:53:56] debug    : 'LogClient' zombie check
passed [status_flag=0000]
3086927552 [CST Dec  1 14:53:56] debug    : 'LogClient' loadavg(5min)
check passed [current loadavg(5min)=0.2]
3086927552 [CST Dec  1 14:53:56] debug    : 'LogClient' cpu usage check
passed [current cpu usage=0.0%]
3086927552 [CST Dec  1 14:53:56] debug    : 'LogClient' mem amount check
passed [current mem amount=2764kB]
3086927552 [CST Dec  1 14:53:56] debug    : 'data_dir' filesystem flags
has not changed since last cycle
3086927552 [CST Dec  1 14:53:56] debug    : 'data_dir' space usage check
passed [current space usage=10.6%]


-----Original Message-----
From: address@hidden
[mailto:address@hidden On
Behalf Of Martin Pala
Sent: Thursday, November 30, 2006 4:20 PM
To: The monit developer list
Subject: Re: <service> start Generates email noise

Hello,

this behavior isn't bug - the 'nonexist' event type has possitive and 
negative variants:

   Does not exist (positive 'nonexist')

     vs.

   Exists (negative 'nonexist')

The alert statement allows to filter just the general event type, not 
the particular polarity (there is no 'exist' option).

=> when you have registered the 'nonexist' event, you should get two 
alerts informing about the beggining and end of the problem.

Martin


Aaron Scamehorn wrote:
> Hello,
> 
>  From version 4.8 to 4.8.2, the following bug has been introduced:
> 
> When we issue a monit <service> start command, we get "Does not exist"

> and a corresponding "Exists" emails.
> 
> Here is the debug output showing this behavior in 4.8.2:
> 'LogClient' Error testing process id [11034] -- No such process
> 'LogClient' Error testing process id [11034] -- No such process
> 'LogClient' start: /cogcap/ccts/bin/logclnt
> 'LogClient' Error testing process id [11034] -- No such process
> Monitoring enabled -- service LogClient
> 'LogClient' Error testing process id [11034] -- No such process
> 'LogClient' process is not running
> Does not exist notification is sent to address@hidden
> 'LogClient' Error testing process id [11034] -- No such process
> 'LogClient' trying to restart
> Monitoring disabled -- service LogClient (stop)
> 'LogClient' Error testing process id [11034] -- No such process
> 'LogClient' process is running with pid 11189
> Exists notification is sent to address@hidden
> 'LogClient' zombie check passed [status_flag=0000]
> 'LogClient' loadavg(5min) check passed [current loadavg(5min)=0.2]
> 'LogClient' cpu usage check passed [current cpu usage=0.0%]
> 'LogClient' mem amount check passed [current mem amount=2776kB]
> 
> 
> Under version 4.8, we don't get the annoying "Does not exist" and a 
> corresponding "Exists" emails:
> 
> 'LogClient' Error testing process id [10970] -- No such process
> 'LogClient' Error testing process id [10970] -- No such process
> 'LogClient' start: /cogcap/ccts/bin/logclnt
> 'LogClient' Error testing process id [10970] -- No such process
> Monitoring enabled -- service LogClient
> 'LogClient' Error testing process id [10970] -- No such process
> 'LogClient' Error testing process id [10970] -- No such process
> 'LogClient' zombie check passed [status_flag=0000]
> 'LogClient' loadavg(5min) check passed [current loadavg(5min)=0.1]
> 'LogClient' cpu usage check passed [current cpu usage=0.0%]
> 'LogClient' mem amount check passed [current mem amount=2776kB]
> 
> 
> 
> Additionally, in our config file, we have the following set:
> set alert address@hidden only on { nonexist, exec, connection }
> 
> We shouldn't be getting an "Exists" email under any circumstance,
should 
> we?
> 
> Thanks,
> Aaron
> 
> 
>
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> 
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