Re: too many open files

256 open files per process only? This is not fixed or is it fixed???

regards David


On 11.02.2004, at 14:43, Pierre Frisch wrote:

> Georg,
>
> Can you be a bit more explicit? Each process on MacOS has a limit of 
> 256 open files you must have open an awful number file to reach that 
> limit? Or is there another mechanism? Are the file handle in static 
> methods?
>
> Thanks
>
> Pierre
>
> On Feb 11, 2004, at 1:46, Georg Tuparev wrote:
>
>> Hey Folks,
>>
>> Remember this discussion that we had a fortnight ago? I was telling 
>> you my story: a second team deployed few WO apps on the same 
>> 10.2.8/WO 5.2.1 Xserve, and suddenly all these problems described 
>> below start popping up. Most of you were finger-pointing  at wotaskd 
>> or JavaMonitor ... there were even thoughts that this happens if 
>> other monitors are running on the same network etc.
>>
>> My "feeling" was (based on past - bad - experience) that it is our 
>> (developer's) mistake related to WOResourceManager  usage. It turned 
>> out to be almost correct - at least in our case.
>>
>> The problem was fixed by setting unused file handles to null and 
>> calling System.gc(). That's all! No EC (dead)locks, no Monitor 
>> mysteries...
>>
>> I was always claiming that I would prefer the Objective-C way of 
>> memory management, and this is yet another reason why I feel I am 
>> right :-)
>>
>> cheers
>>
>> -- georg --
>>
>> "War is God's way of teaching Americans about geography."
>> Ambrose Bierce, writer (1842-1914)
>>
>> On Jan 29, 2004, at 2:53 PM, Simon wrote:
>>
>>>
>>> we've seen this problem when running multiple apps on a panther 
>>> server and re-boot is the only way out we have found. another 
>>> panther-related problem we see randomly is this:
>>>
>>> Cannot write to file 
>>> /Library/WebObjects/Configuration/SiteConfig.xml. Possible 
>>> Permissions Problem.
>>>
>>> ... when trying to shut down an instance. however, if we keep 
>>> clicking the "shut down all instances" button then it does 
>>> eventually go away and the instances do shut down.
>>>
>>> simon
>>>
>>>
>>> On 28 Jan 2004, at 21:39, Pierre Frisch wrote:
>>>
>>>> David,
>>>>
>>>> I would disagree with you on this one. I agree that on WO this can 
>>>> be home grown however in this case there is a problem in Panther. I 
>>>> know because I have had a machine with a bunch of application 
>>>> running on Jaguar that was very stable. The only thing that has 
>>>> changed is the OS and the version of WO and now I have all sorts of 
>>>> troubles.
>>>>
>>>> There are two problems on 10.2.3 one with Apache and one with 
>>>> wotaskd. The Apache one is fairly old: the adaptor does not close 
>>>> the connections to the app immediately and let them linger with 
>>>> consume some of those open file. In addition wotaskd appears to 
>>>> have developed a similar disease on Panther. The combination of 
>>>> both is lethal. You can reduce the wotskd problem by disabling the 
>>>> 1085 config distribution feature and use teh file config.
>>>>
>>>> Pierre
>>>> --
>>>> Pierre Frisch
>>>> sPearWay Ltd.
>>>> sPearCat Web Catalogs, the flexibility of custom design, the price 
>>>> of a package.
>>>> http://www.spearcat.com/
>>>>
>>>> On Jan 28, 2004, at 12:46, David Teran wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> On 28.01.2004, at 21:39, Jürgen Rohrbach wrote:
>>>>>
>>>>>> hello,
>>>>>>
>>>>>> i have read all the postings with "too many open files" but i 
>>>>>> have still a problem to find the correct solution/workaround.
>>>>>> after 2-3 days my app has the following in the log file:
>>>>>>
>>>>>> IOException: too many open files
>>>>>>
>>>>>>
>>>>>> which solutions work to get rid of this shit!
>>>>>>
>>>>>
>>>>>
>>>>> best is to check your code. It turns out that the 'shit' is 
>>>>> homegrown.
>>>>>
>>>>> Things to check:
>>>>>
>>>>> 1) wrong usage of Process instances
>>>>> 2) open streams
>>>>> 3) unhandled exceptions
>>>>> 4) wrong deployment
>>>>> ...
>>>>>
>>>>> This might annoying for you but the problem is in your code. Do 
>>>>> you know the lsof command or are you working on windows?
>>>>>
>>>>> cheers David
>>>>>
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>>
>>
>> Georg Tuparev
>> Tuparev Technologies
>> Klipper 13
>> 1186 VR Amstelveen
>> The Netherlands
>> Mobile: +31-6-55798196
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