Hi,

     I have strange problem with my application. This application is a 
network server, based on TCP/IP connections and ADS database. 
Application waiting on connections from client on TCP port, connects to 
ADS database, and reply to client (about 10 conn./sec.). Each 
connections is loged in txt file (fopen, fwrite, fclose). I have problem 
with this log file. After a random time (between 30 min and several 
hours) each fopen or fcreate function return error 6 (invalid handle) 
and I can't write any files (not only on log file, I can't create or 
write any file) . Everything works fine, except this functions. After 
restart application this function works fine.

Thanks,
Darek

Slamming files open and closed is hard on the system. Why not just open 
the files and write to at as needed.


Jim

On 04/04/2014 04:28 AM, Tomasz Hofman wrote:
> Hi,
>
>      I have strange problem with my application. This application is a
> network server, based on TCP/IP connections and ADS database.
> Application waiting on connections from client on TCP port, connects to
> ADS database, and reply to client (about 10 conn./sec.). Each
> connections is loged in txt file (fopen, fwrite, fclose). I have problem
> with this log file. After a random time (between 30 min and several
> hours) each fopen or fcreate function return error 6 (invalid handle)
> and I can't write any files (not only on log file, I can't create or
> write any file) . Everything works fine, except this functions. After
> restart application this function works fine.
>
> Thanks,
> Darek

Hi,

     Thank's for reply. I change my code and I open log files on program 
start. Log files working correctly now, but I have same problem with 
creating other files (I can't  create them at start). I still need help.

Thank's
Darek


W dniu 2014-04-05 20:16, James Loughner pisze:
> Slamming files open and closed is hard on the system. Why not just 
> open the files and write to at as needed.
>
>
> Jim
>
> On 04/04/2014 04:28 AM, Tomasz Hofman wrote:
>> Hi,
>>
>>      I have strange problem with my application. This application is a
>> network server, based on TCP/IP connections and ADS database.
>> Application waiting on connections from client on TCP port, connects to
>> ADS database, and reply to client (about 10 conn./sec.). Each
>> connections is loged in txt file (fopen, fwrite, fclose). I have problem
>> with this log file. After a random time (between 30 min and several
>> hours) each fopen or fcreate function return error 6 (invalid handle)
>> and I can't write any files (not only on log file, I can't create or
>> write any file) . Everything works fine, except this functions. After
>> restart application this function works fine.
>>
>> Thanks,
>> Darek
>

Opening files uses up file handles. Closing releases files handles but 
the release may not be instantaneous and if you do it enough the OS 
falls behind and you end up running out of file handles. I see this as 
an OS problem not a Xbase++ problem. You may want to redesign your logic 
so that it is not so hard on the file system

Jim

On 04/07/2014 05:47 AM, Tomasz Hofman wrote:
> Hi,
>
>      Thank's for reply. I change my code and I open log files on program
> start. Log files working correctly now, but I have same problem with
> creating other files (I can't  create them at start). I still need help.
>
> Thank's
> Darek
>
>
> W dniu 2014-04-05 20:16, James Loughner pisze:
>> Slamming files open and closed is hard on the system. Why not just
>> open the files and write to at as needed.
>>
>>
>> Jim
>>
>> On 04/04/2014 04:28 AM, Tomasz Hofman wrote:
>>> Hi,
>>>
>>>      I have strange problem with my application. This application is a
>>> network server, based on TCP/IP connections and ADS database.
>>> Application waiting on connections from client on TCP port, connects to
>>> ADS database, and reply to client (about 10 conn./sec.). Each
>>> connections is loged in txt file (fopen, fwrite, fclose). I have problem
>>> with this log file. After a random time (between 30 min and several
>>> hours) each fopen or fcreate function return error 6 (invalid handle)
>>> and I can't write any files (not only on log file, I can't create or
>>> write any file) . Everything works fine, except this functions. After
>>> restart application this function works fine.
>>>
>>> Thanks,
>>> Darek
>>
>

Now, after the change, opening and closing files is rare (about 2 
operations/minute) but problem occurs after the same time as before. 
But, when my problem occurs, in Task Manager I always see about 1100 
used handles. When I check this handles most of them are event handles 
and thread handles (but thread handles are marked as non-existent and I 
don't see them in ThreadInfo function).

Thank's
Darek

W dniu 2014-04-07 20:18, James Loughner pisze:
> Opening files uses up file handles. Closing releases files handles but 
> the release may not be instantaneous and if you do it enough the OS 
> falls behind and you end up running out of file handles. I see this as 
> an OS problem not a Xbase++ problem. You may want to redesign your 
> logic so that it is not so hard on the file system
>
> Jim
>
> On 04/07/2014 05:47 AM, Tomasz Hofman wrote:
>> Hi,
>>
>>      Thank's for reply. I change my code and I open log files on program
>> start. Log files working correctly now, but I have same problem with
>> creating other files (I can't  create them at start). I still need help.
>>
>> Thank's
>> Darek
>>
>>
>> W dniu 2014-04-05 20:16, James Loughner pisze:
>>> Slamming files open and closed is hard on the system. Why not just
>>> open the files and write to at as needed.
>>>
>>>
>>> Jim
>>>
>>> On 04/04/2014 04:28 AM, Tomasz Hofman wrote:
>>>> Hi,
>>>>
>>>>      I have strange problem with my application. This application is a
>>>> network server, based on TCP/IP connections and ADS database.
>>>> Application waiting on connections from client on TCP port, 
>>>> connects to
>>>> ADS database, and reply to client (about 10 conn./sec.). Each
>>>> connections is loged in txt file (fopen, fwrite, fclose). I have 
>>>> problem
>>>> with this log file. After a random time (between 30 min and several
>>>> hours) each fopen or fcreate function return error 6 (invalid handle)
>>>> and I can't write any files (not only on log file, I can't create or
>>>> write any file) . Everything works fine, except this functions. After
>>>> restart application this function works fine.
>>>>
>>>> Thanks,
>>>> Darek
>>>
>>
>

What Anti virus program you use ?

Am 07.04.2014 21:52, schrieb Tomasz Hofman:
>
>      Now, after the change, opening and closing files is rare (about 2
> operations/minute) but problem occurs after the same time as before.
> But, when my problem occurs, in Task Manager I always see about 1100
> used handles. When I check this handles most of them are event handles
> and thread handles (but thread handles are marked as non-existent and I
> don't see them in ThreadInfo function).
>
> Thank's
> Darek
>
> W dniu 2014-04-07 20:18, James Loughner pisze:
>> Opening files uses up file handles. Closing releases files handles but
>> the release may not be instantaneous and if you do it enough the OS
>> falls behind and you end up running out of file handles. I see this as
>> an OS problem not a Xbase++ problem. You may want to redesign your
>> logic so that it is not so hard on the file system
>>
>> Jim
>>
>> On 04/07/2014 05:47 AM, Tomasz Hofman wrote:
>>> Hi,
>>>
>>>      Thank's for reply. I change my code and I open log files on program
>>> start. Log files working correctly now, but I have same problem with
>>> creating other files (I can't  create them at start). I still need help.
>>>
>>> Thank's
>>> Darek
>>>
>>>
>>> W dniu 2014-04-05 20:16, James Loughner pisze:
>>>> Slamming files open and closed is hard on the system. Why not just
>>>> open the files and write to at as needed.
>>>>
>>>>
>>>> Jim
>>>>
>>>> On 04/04/2014 04:28 AM, Tomasz Hofman wrote:
>>>>> Hi,
>>>>>
>>>>>      I have strange problem with my application. This application is a
>>>>> network server, based on TCP/IP connections and ADS database.
>>>>> Application waiting on connections from client on TCP port,
>>>>> connects to
>>>>> ADS database, and reply to client (about 10 conn./sec.). Each
>>>>> connections is loged in txt file (fopen, fwrite, fclose). I have
>>>>> problem
>>>>> with this log file. After a random time (between 30 min and several
>>>>> hours) each fopen or fcreate function return error 6 (invalid handle)
>>>>> and I can't write any files (not only on log file, I can't create or
>>>>> write any file) . Everything works fine, except this functions. After
>>>>> restart application this function works fine.
>>>>>
>>>>> Thanks,
>>>>> Darek
>>>>
>>>
>>
>

I use Eset Endpoint Antivirus ver. 5.

Darek

W dniu 2014-04-08 07:06, Klaus Overhage pisze:
> What Anti virus program you use ?
>
> Am 07.04.2014 21:52, schrieb Tomasz Hofman:
>>
>>      Now, after the change, opening and closing files is rare (about 2
>> operations/minute) but problem occurs after the same time as before.
>> But, when my problem occurs, in Task Manager I always see about 1100
>> used handles. When I check this handles most of them are event handles
>> and thread handles (but thread handles are marked as non-existent and I
>> don't see them in ThreadInfo function).
>>
>> Thank's
>> Darek
>>
>> W dniu 2014-04-07 20:18, James Loughner pisze:
>>> Opening files uses up file handles. Closing releases files handles but
>>> the release may not be instantaneous and if you do it enough the OS
>>> falls behind and you end up running out of file handles. I see this as
>>> an OS problem not a Xbase++ problem. You may want to redesign your
>>> logic so that it is not so hard on the file system
>>>
>>> Jim
>>>
>>> On 04/07/2014 05:47 AM, Tomasz Hofman wrote:
>>>> Hi,
>>>>
>>>>      Thank's for reply. I change my code and I open log files on 
>>>> program
>>>> start. Log files working correctly now, but I have same problem with
>>>> creating other files (I can't  create them at start). I still need 
>>>> help.
>>>>
>>>> Thank's
>>>> Darek
>>>>
>>>>
>>>> W dniu 2014-04-05 20:16, James Loughner pisze:
>>>>> Slamming files open and closed is hard on the system. Why not just
>>>>> open the files and write to at as needed.
>>>>>
>>>>>
>>>>> Jim
>>>>>
>>>>> On 04/04/2014 04:28 AM, Tomasz Hofman wrote:
>>>>>> Hi,
>>>>>>
>>>>>>      I have strange problem with my application. This application 
>>>>>> is a
>>>>>> network server, based on TCP/IP connections and ADS database.
>>>>>> Application waiting on connections from client on TCP port,
>>>>>> connects to
>>>>>> ADS database, and reply to client (about 10 conn./sec.). Each
>>>>>> connections is loged in txt file (fopen, fwrite, fclose). I have
>>>>>> problem
>>>>>> with this log file. After a random time (between 30 min and several
>>>>>> hours) each fopen or fcreate function return error 6 (invalid 
>>>>>> handle)
>>>>>> and I can't write any files (not only on log file, I can't create or
>>>>>> write any file) . Everything works fine, except this functions. 
>>>>>> After
>>>>>> restart application this function works fine.
>>>>>>
>>>>>> Thanks,
>>>>>> Darek
>>>>>
>>>>
>>>
>>

Tomasz Hofman wrote:

> I use Eset Endpoint Antivirus ver. 5.

Try to deactivate AV (or add an exception for the directory where you
create the files) and try if that fixes the problem...

Thomas

After disabling AV or adding directory to the exceptions, problem 
still occurs.

Darek

W dniu 2014-04-08 13:51, Thomas Braun pisze:
> Tomasz Hofman wrote:
>
>> I use Eset Endpoint Antivirus ver. 5.
> Try to deactivate AV (or add an exception for the directory where you
> create the files) and try if that fixes the problem...
>
> Thomas

Tomasz Hofman wrote:

>      After disabling AV or adding directory to the exceptions, problem 
> still occurs.

I htink you have to try and create a small sample that reporduces this and
send it to Alaska support.

Thomas

Hello Tomasz:
good morning.
Did you try to put some delay (ie: Sleep(3)) after FClose()?

Beling
Best regards

Em 9/4/2014 05:40, Thomas Braun escreveu:
> Tomasz Hofman wrote:
>
>>       After disabling AV or adding directory to the exceptions, problem
>> still occurs.
>
> I htink you have to try and create a small sample that reporduces this and
> send it to Alaska support.
>
> Thomas
>

Hi,

No, but I think it's not a problem with closing the file. After the 
changes in the code files are opened and closed very rare.

Thank's
Darek

W dniu 2014-04-09 14:38, Carlos A Beling pisze:
> Hello Tomasz:
> good morning.
> Did you try to put some delay (ie: Sleep(3)) after FClose()?
>
> Beling
> Best regards
>
> Em 9/4/2014 05:40, Thomas Braun escreveu:
>> Tomasz Hofman wrote:
>>
>>>       After disabling AV or adding directory to the exceptions, problem
>>> still occurs.
>>
>> I htink you have to try and create a small sample that reporduces 
>> this and
>> send it to Alaska support.
>>
>> Thomas
>>