Can't locate object method cleanup_for_exec via package Apache
Hi list, I'm understood that fork'ing from mod_perl is not very good idea, but we have no choice. Because it is up to user to decide to launch job which syncronize data in the two database sources. And this job may take a long time. I'm has no expirience before in using fork call, so I'm reading chapter '10.4.3 Forking and Executing Subprocesses from mod_perl' of mod_perl Guide careful. I'm understood that I must cleanup soket in child process. In '10.4.3.2 Freeing the Parent Process' written [cp]: 'Apache::SubProcess comes to help and provides a method cleanup_for_exec() which takes care of closing this file descriptor.' p 365. But I'm does not see such sub in the Apache::Subprocess. And my code generates run time error Can't locate object method cleanup_for_exec via package Apache My RH linux with kernel 2.2.14-5.0, Apache/1.3.12 (Unix) mod_perl/1.25 mod_perl Guide: Version 1.30 Sep, 2 2001. Apache::SubProcess v0.02. Am I miss something ? -- Best regards, Mike mailto:[EMAIL PROTECTED]
Re: Can't locate object method cleanup_for_exec via package Apache
You might be able to do what you want without forking, and without tying up your apache process while the database sync takes place. Just write a server process using something like IO::Socket or POE (see http://poe.perl.org). Have the mod_perl handler send a message to the separate server process to start the long-running job. You might even be able to query the server process from mod_perl to check on the status of said job, to report the status to the web browser.I started work on this sort of solution last spring, and it looked feasible, but I got pulled to a different project before I could fully implement it. I'm curious to see what others think of this approach. HTH, Wes Sheldahl Mike P. Mikhailov [EMAIL PROTECTED] on 10/08/2001 10:46:41 AM Please respond to Mike P. Mikhailov [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc:(bcc: Wesley Sheldahl/Lex/Lexmark) Subject: Can't locate object method cleanup_for_exec via package Apache Hi list, I'm understood that fork'ing from mod_perl is not very good idea, but we have no choice. Because it is up to user to decide to launch job which syncronize data in the two database sources. And this job may take a long time. I'm has no expirience before in using fork call, so I'm reading chapter '10.4.3 Forking and Executing Subprocesses from mod_perl' of mod_perl Guide careful. I'm understood that I must cleanup soket in child process. In '10.4.3.2 Freeing the Parent Process' written [cp]: 'Apache::SubProcess comes to help and provides a method cleanup_for_exec() which takes care of closing this file descriptor.' p 365. But I'm does not see such sub in the Apache::Subprocess. And my code generates run time error Can't locate object method cleanup_for_exec via package Apache My RH linux with kernel 2.2.14-5.0, Apache/1.3.12 (Unix) mod_perl/1.25 mod_perl Guide: Version 1.30 Sep, 2 2001. Apache::SubProcess v0.02. Am I miss something ? -- Best regards, Mike mailto:[EMAIL PROTECTED]
Re: Can't locate object method cleanup_for_exec via package Apache
Mike P. Mikhailov wrote: Hi list, I'm understood that fork'ing from mod_perl is not very good idea, but we have no choice. Because it is up to user to decide to launch job which syncronize data in the two database sources. And this job may take a long time. I'm has no expirience before in using fork call, so I'm reading chapter '10.4.3 Forking and Executing Subprocesses from mod_perl' of mod_perl Guide careful. I'm understood that I must cleanup soket in child process. In '10.4.3.2 Freeing the Parent Process' written [cp]: 'Apache::SubProcess comes to help and provides a method cleanup_for_exec() which takes care of closing this file descriptor.' p 365. But I'm does not see such sub in the Apache::Subprocess. And my code generates run time error Can't locate object method cleanup_for_exec via package Apache My RH linux with kernel 2.2.14-5.0, Apache/1.3.12 (Unix) mod_perl/1.25 mod_perl Guide: Version 1.30 Sep, 2 2001. Apache::SubProcess v0.02. Am I miss something ? Nope, Doug hasn't released an updated Apache::Subprocess yet. Search the mailing list archive (see http://perl.apache.org/) for 'cleanup_for_exec' and you will get the patch that I've posted for the current version. Sorry for causing confusion. _ Stas Bekman JAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide http://perl.apache.org/guide mailto:[EMAIL PROTECTED] http://ticketmaster.com http://apacheweek.com http://singlesheaven.com http://perl.apache.org http://perlmonth.com/
