Re: [WebDNA] Some code inside a large loops fail ... but why?
This WebDNA talk-list message is from 2010
It keeps the original formatting.
numero = 104431
interpreted = N
texte = I have not done much in this area.. but how about something creative with [spawn]? Could you spawn/divide the task into batches so that if one tcpconnect fails then it will only spoil that one batch that it is in? (Looking at the docs for [spawn] I see that you may have to stagger (in time) those spawns since too many at once will weigh down the server too much) On Jan 12, 2010, at 9:24 PM, Kenneth Grome wrote: > Browsers have timeouts after which they post an error so I don't see > why tcpconnect shouldn't have a timeout as well. The default > behavior could be no timeout so existing sites don't break or have > to be re-coded, but with an optional timeout parameter at least the > rest of the code on the page can be processed. > > In my case of 300,000 loop iterations a tcpconnect failure in the > beginning can result in ten or hundreds of thousands of db records > not entered -- all because of one simple tcpconnect that failed. I > would much rather just skip that one, and any others that fail along > the way, then go back later and check the db to see which ones are > missing and re-try only those. > > Sincerely, > Kenneth Grome > www.KenGrome.com > >> Ken you are right. >> >> Now that I think about it, TCP connections that "Time Out" cause >> problems on my Windows server and basically lock the connection >> until the WebDNA service is restarted. >> >> Yes, a time out would be great or any other way of killing the >> connection. >> >> Regards >> >> Stuart Tremain >> IDFK Web Developments >> AUSTRALIA >> webdna@idfk.com.au >> >> On 13/01/2010, at 2:08 PM, Kenneth Grome wrote: >> >>> Won't work, if the tcpconnect gets stuck the waitforfile won't >>> execute. >>> >>> Waitforfile only delays the following code, it won't force it to >>> execute. >>> >>> >>>> What about a WaitForFile ? >>>> >>>> >>>> On 13/01/2010, at 12:09 PM, Kenneth Grome wrote: >>>> >>>>> Another question which may lead to new insights here: >>>>> >>>>> When the tcpconnect fails to get a response, what happens? Does >>>>> it prevent the rest of the loop from executing? If so, is there >>>>> some kind of timeout built into tcpconnect that we can use to >>>>> force the loop to continue after such a tcpconnect freeze/failure? ------------ Govinda govinda.webdnatalk@gmail.com
Associated Messages, from the most recent to the oldest:
I have not done much in this area.. but how about something creative with
[spawn]? Could you spawn/divide the task into batches so that if one tcpconnect fails then it will only spoil that one batch that it is in? (Looking at the docs for
[spawn] I see that you may have to stagger (in time) those spawns since too many at once will weigh down the server too much) On Jan 12, 2010, at 9:24 PM, Kenneth Grome wrote: > Browsers have timeouts after which they post an error so I don't see > why tcpconnect shouldn't have a timeout as well. The default > behavior could be no timeout so existing sites don't break or have > to be re-coded, but with an optional timeout parameter at least the > rest of the code on the page can be processed. > > In my case of 300,000 loop iterations a tcpconnect failure in the > beginning can result in ten or hundreds of thousands of db records > not entered -- all because of one simple tcpconnect that failed. I > would much rather just skip that one, and any others that fail along > the way, then go back later and check the db to see which ones are > missing and re-try only those. > > Sincerely, > Kenneth Grome > www.KenGrome.com > >> Ken you are right. >> >> Now that I think about it, TCP connections that "Time Out" cause >> problems on my Windows server and basically lock the connection >> until the WebDNA service is restarted. >> >> Yes, a time out would be great or any other way of killing the >> connection. >> >> Regards >> >> Stuart Tremain >> IDFK Web Developments >> AUSTRALIA >> webdna@idfk.com.au >> >> On 13/01/2010, at 2:08 PM, Kenneth Grome wrote: >> >>> Won't work, if the tcpconnect gets stuck the waitforfile won't >>> execute. >>> >>> Waitforfile only delays the following code, it won't force it to >>> execute. >>> >>> >>>> What about a WaitForFile ? >>>> >>>> >>>> On 13/01/2010, at 12:09 PM, Kenneth Grome wrote: >>>> >>>>> Another question which may lead to new insights here: >>>>> >>>>> When the tcpconnect fails to get a response, what happens? Does >>>>> it prevent the rest of the loop from executing? If so, is there >>>>> some kind of timeout built into tcpconnect that we can use to >>>>> force the loop to continue after such a tcpconnect freeze/failure? ------------ Govinda govinda.webdnatalk@gmail.com
Govinda
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