[squeak-dev] Re: [Pharo-project] VM crash on Windows
stephane ducasse
stephane.ducasse at gmail.com
Thu Mar 11 08:15:16 UTC 2010
ok so excellent then.
I though that having a max counter to get let us say 1000 last crash could help.
I do not know what is the situation of dabblebd like setup.
Stef
On Mar 11, 2010, at 9:09 AM, Andreas Raab wrote:
> On 3/10/2010 11:40 PM, Stéphane Ducasse wrote:
>> did you not notice problem with the size of the log file with the appening behavior?
>> Because I started to have a huge file where all the crashes reports were added one by one and I was wondering if
>> on a server this may not be a problem (probably having a limit for the size of the report could be a good idea - but I do not know).
>
> One a production server? Do the math: 1GB of disk space costs cents. One hour of two of your engineers trying to recreate the problem or recover the information costs a few hundred bucks. That's a ratio of 10000:1.
>
> On our main server the size of the logs is 500MB going back six months or so when we reimaged it last. That's 0.1% of the disk space on the box. The other day we bought a few more TBs of cheap scratch storage which we use for throwaway VMs in QA (vmware VMs, not Squeak so it's 20+GB each).
>
> On a production server it makes no sense whatsoever to limit logging unless you're logging *excessively*. In an emergency the logs are all you have to find out what is going wrong, it's worth keeping them.
>
> Cheers,
> - Andreas
>
>>
>> Stef
>>
>> On Mar 10, 2010, at 2:12 PM, Schwab,Wilhelm K wrote:
>>
>>> Andreas,
>>>
>>> I will give that a try. I think it should be active by default, but it won't matter too much once I modify the shortcuts on a few boxes. Other wish list items would be to have a similar option on Linux and to ensure that the contents of the log are concatenated vs. replaced with each crash.
>>>
>>> Thanks!!
>>>
>>> Bill
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: pharo-project-bounces at lists.gforge.inria.fr [mailto:pharo-project-bounces at lists.gforge.inria.fr] On Behalf Of Andreas Raab
>>> Sent: Wednesday, March 10, 2010 12:32 AM
>>> To: Pharo Development
>>> Subject: Re: [Pharo-project] VM crash on Windows
>>>
>>> Hi Bill -
>>>
>>> If you have problems like these consider cross-posting to squeak-dev or vm-dev. I only check Pharo in irregular intervals.
>>>
>>> On 3/8/2010 4:27 PM, Schwab,Wilhelm K wrote:
>>>> I am having a sudden problem with Pharo crashing on Windows - it's quitting on handling Seaside requests, and I'm getting **no** information. The VM pops up the output console, writes a lot of (probably useful) information to it, and then promptly exits.
>>>
>>> The issue you're seeing is caused by a recursive MessageNotUnderstood error. You can easily recreate this by doing the following:
>>>
>>> ((ProtoObject subclass: #Bummerator
>>> instanceVariableNames: ''
>>> classVariableNames: ''
>>> poolDictionaries: ''
>>> category: 'Kernel-Objects')
>>> superclass: nil;
>>> new) bummer.
>>>
>>> The reason why that doesn't result in a regular crash.dmp is that the support code (which catches the crashes and writes the dump) isn't involved at all. The interpreter just quits.
>>>
>>> Contrast this with, say the result of an FFI crash:
>>>
>>> (ExternalLibraryFunction
>>> name:'' module: '' callType: 0
>>> returnType: ExternalType void argumentTypes: #())
>>> setHandle: ((ExternalAddress new) at: 1 put: 1; yourself);
>>> invoke
>>>
>>> This does generate a crash.dmp since the support code can catch the problem.
>>>
>>> However, to catch the former issue you can run the vm with -log:
>>> <logfile> which will contain the resulting output.
>>>
>>>> The rebuttal: if it has time/ability to write information all over part of the screen, it can open a file and make sure it leaves a trace of what happened. Right? The current vms (Windows and Linux) appear to be totally disinterested in logging crashes, and that needs to change.
>>>
>>> They do if you tell 'em to.
>>>
>>> Cheers,
>>> - Andreas
>>>
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>>
>
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