Re: New mod_perl Logo
mod_perl is a lousy name. It is causing me a problem. My potential customers have heard of Perl and Apache, MySql and Postgres, but they dot like the idea of perl modifying the Apache processing. It strikes them as tinkering round with the internals and liable to cause problems 'when we upgrade' or 'move to another platform'. It also does not look good on a resume when you are sending it to someone who has never heard of it. You are never quite sure whether to Wordcap it or not. Give it some other marketting name, even if it keeps its original name in places like this. Anything will do, WebBlast, Insiouxiance, Perlandra, Exsight, Insite, HowtoSite - I really do not mind. Regards - Paul Cotter
Reverse engineered HTML
Does a package exist that will read an HTML document and generate an Apache::Registry cgi script? Even better if it accepts an !--Perltag. Regards - Paul Cotter
Re: install perl-win32-bin-0.6.exe on win98
Hi I am running it but I am using a different source. The respective psrt of my conf file is LoadModule anon_auth_module modules/mod_auth_anon.so LoadModule dbm_auth_module modules/mod_auth_dbm.so #LoadModule digest_auth_module modules/mod_auth_digest.so #LoadModule cern_meta_module modules/mod_cern_meta.so #LoadModule digest_module modules/mod_digest.so #LoadModule expires_module modules/mod_expires.so #LoadModule headers_module modules/mod_headers.so LoadModule proxy_module modules/mod_proxy.so #LoadModule rewrite_module modules/mod_rewrite.so #LoadModule speling_module modules/mod_speling.so LoadModule info_module modules/mod_info.so LoadModule status_module modules/mod_status.so LoadModule usertrack_module modules/mod_usertrack.so #LoadModule usertrack_module modules/ApacheModuleUserTrack.dll LoadModule perl_module modules/mod_perl.so Perl #!perl.exe $Apache::Server::SaveConfig = 1; __END__ /Perl I realise this does not solve your problem unless you want to have a go at using the binaries from the university of Winnipeg. If so I will try and find the url you need. Paul Cotte - Original Message - From: David Lanzarote García [EMAIL PROTECTED] To: Randy Kobes [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Wednesday, 09 May, 2001 12:35 PM Subject: Re: install perl-win32-bin-0.6.exe on win98 On Tue, 8 May 2001, Randy Kobes wrote: On Mon, 7 May 2001, David Lanzarote García wrote: I'm using perl-win32-bin-0.6.exe package, so I use the Perl and Apache binaries that come with it. When everything is unpacked I move the perl subdirectory to c:\Prel, the apache subdirectory to c:\apache and the openssl directory to c:\openssl. When everything is done as it's explained on the installation readme (I think so, but I'm not 100% sure),I try to execute apache as: Apache.exe -f conf\httpd.conf-perl and the error cannot load /apache/modules/apachemoduleperl into server appears. It sounds like it's trying to load the dll named ApacheModulePerl, without the .dll extension. What if you try, in httpd.conf-perl, putting in LoadModule perl_module modules/ApacheModulePerl.dll (ie, with the extension). best regards, randy kobes I tried to load the module both ways, first by: LoadModule perl_module modules/ApacheModulePerl.dll and it produced the error: Syntax error on line 181 of c:/apache/conf/httpd.conf-perl: cannot load /apache/modules/ApacheModulePerl.dll into server: after that, I tried to load the module by: LoadModule perl_module modules/ApacheModulePerl and it produced the error: Syntax error on line 181 of c:/apache/conf/httpd.conf-perl: cannot load /apache/modules/ApacheModulePerl into server: and ApacheModulePerl.dll was on directory c:\apache\modules\ , so I don't know why this nodule can't be loaded. Thanks for your ideas..
Re: Apache Processes hanging
This answer has nothing to do with modperl - sorry. I have had the same problem on a Sybase database with a 'normal' application. This situation can occur due to a database (b)locks, particularly if a transaction is composed of more than one update, or it fires a referential trigger which has the same effect. The first question is what is the lock-level. Is it at the row or at the page - I presume the row. If the insert causes a 'fault' such that an index page becomes full and has to split then the whole index page will be locked regardless of row-level locking. If the second part of transaction is waiting on someone else then we can get the deadly embrace situation. However, it can normally be cleared on time-outs. If however you are acquiring these blocks faster then they time out, then in very short order you will be .. er.. screwed. Sometimes it can help to do dirty reads if the data you need to present does not need to be up to date. One of the cures for this is an update pipe. Instead of each 'program' doing the insert on the database they funnel the updates to a single threading process. Reads of course can be be done by the individual 'programs'. Can you confirm that the connection is freed if you kill the process that is blocked? If so this gives you another way out. - Original Message - From: Robert Landrum [EMAIL PROTECTED] To: Kevin Slean [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Thursday, 03 May, 2001 03:40 PM Subject: Re: Apache Processes hanging At 10:37 AM -0400 5/3/01, Kevin Slean wrote: Mod_perlers, I have a problem with Apache and was looking for your thoughts on my problem or some additional mailing lists more focused on just Apache. I have 70 httpd daemons running and some of them just appear to hang. As time goes by, the number of hung processes increases such that there are no working ones left to perform real work. Consequently transaction processing performance drops eventually to zero. Our web transactions running through these httpd daemons should not take more than 60 seconds in a worst case scenario. Yet, some of these 'hung' processes have been on the same transaction for over 30 hours. I originally thought that this was a mod_perl problem and was buried in the CGI/Perl routines performing the transactions. However, upon closer inspection, I have found that these hanging processes are also running JAVA servlets and gif gets. This makes me suspect that it is an Apache problem. I ran truss on the hung processes and found that they fell into two camps. The first group was sitting at a read system call. The second group was in a loop with sigalarm going off every 10 seconds. I'm having similar problems, but we think it's directly related to Oracle. Basically, a connection is made to the Oracle database, a transaction is started and finished, but the connection to the database doesn't go away and the statement (at least from the oracle side) never seems to finish. The data is present in the database (these are insert statement, btw). Over time, every process collects one of these hanging statements and it eventually overwhelms our oracle database. The only solution is to restart apache every 5 minutes to eliminate the built-up non-finished transactions. Has anyone seen this before? Rob -- As soon as you make something foolproof, someone will create a better fool.
Much Todo about nothing
If this is the wrong place to post then please adviseFYI:At http://perl.apache.org/from-cvs/modperl-2.0/ when extracting modperl-2.0_20010427110246.tar.gz there is a file called Todo and a directory called todo. This is a 'problem' in a windows environment which is case insensitive. Obviously easy to bypass.Regards - Paul Cotter
Passing Tied Filehandles
Hi
I was trying to get NET::Ftp to work in Apache to post statistics via FTP.
These stats are in memory and are manipulated before being posted. I wanted
totie a filehandle so thatNet::FTP would call my READ code. So I
could just go
MyNetFTPObject-put(TIED_FILE_HANDLE,
remote_file)
I cannot get this to work and it seems to boil
down to this fabricated example. Note that theREAD / OPEN etc routines in
PRCTiedHandle prints out the READ /
OPEN 'debug' message. A summary of the example is:
1) Tie
and open a filehandle , buffering data in array.
2) sysread
from within main::
3) Pass
filehandle to subroutine and go sysread
4) sysread
again from within main
The result is that the 'main' sysread work, but the
sysread in the subroutine'fails' (returns undef).
use strict;use PRCTiedHandle;my ( $len ,
$buf, $blksize) = (0,"",120);my $file = 'c:\a.txt';
tie *FILMAIN, PRCTiedHandle::;open *FILMAIN,
$file or die "cannot open $file" ;print "Main 1 before sysread 1
filmain=", *FILMAIN, " ref=", ref(\*FILMAIN)
,"\n";sysread(*FILMAIN,$buf="",$blksize);
print "Main 2 after first
sysread\n";readIt(*FILMAIN);
$len = sysread(*FILMAIN,$buf="",$blksize); print "Main 3 after sysread
2\n";close FILMAIN;
sub readIt (*){*FILSUB=
shift; print "readIt filsub=",*FILSUB, "
ref=",ref(\*FILSUB),"\n"; print "readIt filsub and filmain
are equal\n" if (*FILSUB eq *FILMAIN); return
$len = sysread(*FILSUB,$buf="",$blksize);};
When I run the above I get the following output from various print
statements:--- snip TIEHANDLE calledOPEN c:\a.txt:
countRecs=11Main 1 before sysread 1 filmain=*main::FILMAIN ref=GLOBREAD
enteredMain 2 after first sysreadreadIt
filsub=*main::FILMAIN ref=GLOBreadIt filsub and filmain are
equalREAD enteredMain 3 after sysread 2CLOSE called
--- snip The READ routine in the handler is called correctly
from the main routine. However, when I call it from the readIt subroutine then
'nothing' happens. (If I substitute FILEMAIN for FILESUB in readIt then it works
of course). There appears to be a logical difference between the tied FILMAIN
and the passed FILSUB, even though they 'point' to the same thing. I guess I
really don'tunderstand what is Tied. I know TISMTOWTDI, however, I have
tried the complete Heinz 57 varieties of passed referenced and dereferenced
variables.All have failed.After I get this example working I can
modFTP::Net to accept tied Filehandles.Can anyone give me a few
pointers? I prefer them to references (C background, you know)Paul
Cotterwww.powermagic.net
Re: mirroring data across a server cluster
[OT] - but... Do not throw out database replication as a solution. Trying to maintain synchronicity across multiple databases is not a trivial task. You have to cope with single point failure at the transaction level, (eg the server 'one' update works, but server 'two' fails) clashes (same record updated differently on two servers.) communication failures between servers, single server maintenance, 'non-authorized' updates toa single server and so on. Event simplistic methods such as replacing all updates with stored procedures that can update across multiple data-bases (eg Oracle Sybase etc) will have problems. If you wish to separate the servers geographically then loss of network will cause problems unless you adopt a store-and-forward basis. One method that has a reasonable level of success is a transaction log analyser. Updates (as opposed to reads) are applied to a single server and the transaction log analyser applies them to the other servers. However, for ease of creation and maintenance a publish-and-subscribe replication system is easiest. Remember that only certain data need be replicated. I have tried in the past to extract to cached flat files for performance. At the end of the day it is usually cheaper to go out and buy more hardware. This is important when clustering for redundancy purposes, I'm trying to address 2 issues: A. Avoiding a single point of failure associated with a having a central repository for the data, such as a NFS share or a single database server. B. Avoiding the overhead from using heavyweight tools like database replication. So I've been thinking about how to pull that off, and I think I've figured out how, as long as I don't need every machine to have exactly the same version of the data structure at all times. What it comes down to is implementing 2 classes: one implements a daemon running on each server in the cluster, responsible for handling requests to update the data across the network and one a class usable inside mod_perl to handle local updates and inform other servers of updates. I believe I wouldn't be the only person finding something like this terrifically useful. Furthermore, I see that Cache::Cache could be the underlying basis for those classes. Most of the deep network programming is already there in Net::Daemon. What say y'all to something like Cache::Clustered::Server and Cache::Clustered::Client::* ? --Christopher Everett
Re: Forbidden access
- Original Message - From: "Stas Bekman" [EMAIL PROTECTED] To: "Daniel" [EMAIL PROTECTED] Also there's a typo: It has been confirmed by the original author that the typo was only in the email sample. There was also a /Locatiom but I guess this was a transcription error also.
Re: wheris @INC defined ?
To: "Henri Delebecque" [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] "Henri" == Henri Delebecque [EMAIL PROTECTED] writes: Henri I'm a mod_perl newbie, trying to install it on an apache server Henri on a Digital-Unix platform. Henri I have succeded, with problems, to make a mod_perl lib. Henri Unfortunately, when I launch the apache server, it fails with Henri an error message telling that it can't locate Apache.pm in @INC. Henri More strangely, it says that @INC contains Henri /u/richm/QXZ-OSF/nsPerl5.005_03/lib/alpha-dec-osf.../webmaster/apache, Henri when the apache dierctory is in fact /webmaster/apache_1.3.19 Henri (the /webmaster/apache is the operationnal version of the server) You can alter these in config.pm in your lib directory.
Re: wheris @INC defined ?
To: "Henri Delebecque" [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] "Henri" == Henri Delebecque [EMAIL PROTECTED] writes: Henri I'm a mod_perl newbie, trying to install it on an apache server Henri on a Digital-Unix platform. Henri I have succeded, with problems, to make a mod_perl lib. Henri Unfortunately, when I launch the apache server, it fails with Henri an error message telling that it can't locate Apache.pm in @INC. Henri More strangely, it says that @INC contains Henri /u/richm/QXZ-OSF/nsPerl5.005_03/lib/alpha-dec-osf.../webmaster/apache, Henri when the apache dierctory is in fact /webmaster/apache_1.3.19 Henri (the /webmaster/apache is the operationnal version of the server) You can alter these in config.pm in your lib directory.
Re: mod_perl startup sequence?
Title: mod_perl startup sequence? From: Drew Wilson To: [EMAIL PROTECTED] Sent: Monday, 05 March, 2001 08:24 PM Subject: mod_perl startup sequence? I'm confused about when mod_perl loads Perl Modules. It appears my perl module gets loaded twice: once when the log writes to stdout, and once when the log message is written to error-log. I would expect my module to only get loaded once. Why twice? To help me trace loading, I added "print STDERR" statements to my .conf file and my perl module. To my surprise, log messages go to the console, and messages go the log file 30 milliseconds later. Also, the Apache::Server::Starting is 1 first time through, and 0 the second time through. NOTE: PerlFreshRestart is NOT defined. For example, this appears on my console: # .conf started at 983839924.241642, Starting = 1, ReStarting=0 # wierd.pm started at 983839924.274978, Starting = 1, ReStarting=0 # .conf finished at 983839924.277637 And this appears in my error-log: # .conf started at 983839924.285614, Starting = 0, ReStarting=0 # wierd.pm started at 983839924.292273, Starting = 0, ReStarting=0 # .conf finished at 983839924.294823 Notice the difference in execution times (1st ends at 983839924.277637 and the 2nd one starts at 983839924.285614). I have a similar confusion.My httpd.conf opens with LoadModule perl_module modules/mod_perl.soPerl open FIL, "c:\\a.txt"; print FIL "\nStart httpd.conf pid=$$"; close FIL;/PerlAfter starting Apache I have the following in c:\a.txtStart httpd.conf pid=2144Start httpd.conf pid=2144Start httpd.conf pid=2072startup.pl is also run three times.The config is win2k, apache 1.3.17, mod_perl 1.25. The taskmanager shows two apache.exe's running and two cidaemons. I could understand a fallback apache, bit I cannot see why the code is executed twice for the same pid.Can someone explain this behaviour - or tell me where I should go to read about it. (politely!-)TVM - Paul Cotter
