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other. Join them; it only takes a minute: Sign up can't find perl error log up vote 1 down vote favorite I have a perl file (eg:test.pl) which does some DB operations. While testing, its working fine. I execute this file as a background process by using the command perl test.pl & Its working properly for some days. perl debug But after some days ,the file execution get stopped. How can I find the reason or view the error? I checked the log file "/var/log/httpd/error_log", but can't find anything. I keep the perl file in a server, which runs in Cent OS. Any one have idea? perl centos share|improve this question edited Nov 19 '13 at 15:00 Flimzy 15.9k54369 asked Nov 19 '13 at 12:35 Linto 51231434 add a comment| 1 Answer 1 active oldest votes up vote 5 down vote accepted There is no 'perl error log' But you can define a destination for output to be saved to, just run your script like this: perl test.pl >> /var/log/some-log-file.log 2>&1 & This will redirect STDOUT (normal shell output) and STDERR (error output) to /var/log/some-log-file.log instead of to the terminal. You may also wish to use nohup in order to have the script ignore HANGUP (logout) signals, which could be causing your unexpected terminations: nohup perl test.pl >> /var/log/some-log-file.log 2>&1 & Obviously, whichever user you run the script as will need to ha

Q&A Tutorials Poetry RecentThreads NewestNodes Donate What'sNew on Aug 27, 2010 at 06:31UTC ( #857618=perlquestion: print w/replies, xml ) Need Help?? tej has asked for the wisdom of the Perl Monks concerning the following question: I want to create a log file for errors and some other data while my

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script is running. If i am using warn for error handeling how can i print perl die those warnings in log file (.txt file) If its not possible with warn how can i do it? Thank youComment on Creating log perl print files for errors and warnings Replies are listed 'Best First'. Re: Creating log files for errors and warnings by stevieb (Prior) on Aug 27, 2010 at 07:21UTC What have you tried?: #!/usr/bin/perl use warnings; use strict; open http://stackoverflow.com/questions/20071751/cant-find-perl-error-log my $fh, ">", 'logfile.txt' or die "Can't open the fscking file: $!"; my $need_work = 10; my $i_tried = 0; while ( $need_work > $i_tried ) { $i_tried++; my $statement = "I've tried $i_tried things as a test\n"; print $fh $statement; } __END__ [download] % cat logfile.txt I've tried 1 things as a test I've tried 2 things as a test I've tried 3 things as a test I've tried 4 things as a test http://www.perlmonks.org/?node_id=857618 I've tried 5 things as a test I've tried 6 things as a test I've tried 7 things as a test I've tried 8 things as a test I've tried 9 things as a test I've tried 10 things as a test [download] Steve[reply][d/l][select] Re: Creating log files for errors and warnings by Khen1950fx (Canon) on Aug 27, 2010 at 07:32UTC On a very simple level, open STDOUT for "some other data' and open STDERR for errors. #!/usr/bin/perl use strict; use warnings; use diagnostics; open(STDOUT, '>', 'results.log') or die "Can't open log"; open(STDERR, '>', 'results_error.log') or die "Can't open log"; system("pmpath ExtUtils::MakeMaker"); system("pmpath Acme::AandB"); [download] [reply][d/l] Re: Creating log files for errors and warnings by Marshall (Monsignor) on Aug 27, 2010 at 09:20UTC When your Perl program starts, it inherits two file handles for output, STDOUT and STDERR. Both go to the console with a bit of a difference, STDOUT is buffered and STDERR is not. Run time warnings as well as anything that you code as warn "xy"; goes to STDERR. The default print goes to STDOUT. Many of my scripts just send their output to STDOUT (don't even open a file for output). To cause the STDERR output to go to the same place, this can be done with the shell, to send the STDOUT and STDERR of something.pl into the m

A • B • C • D • E F • G • H • I • L M • N • O • P • S T • U • X Log::Message Perl 5 version 12.0 documentation Go to top • Download PDF Show http://perldoc.perl.org/5.12.0/Log/Message.html page index • Show recent pages Home > Core modules (L) > Log::Message Please note: Many features of this site require JavaScript. You appear to have JavaScript disabled, or are running a non-JavaScript capable web browser. To http://www.linuxjournal.com/article/2055 get the best experience, please enable JavaScript or download a modern web browser such as Internet Explorer 8, Firefox, Safari, or Google Chrome. Recently read Log::Message NAMESYNOPSISDESCRIPTIONHierarchyOptionsMethodsnewstoreretrievefirstlastflushSEE ALSOAUTHORAcknowledgementsCOPYRIGHTNAME Log::Message - A generic message storing mechanism; SYNOPSIS perl error use Log::Message private => 0, config => '/our/cf_file'; my $log = Log::Message->new( private => 1, level => 'log', config => '/my/cf_file', ); $log->store('this is my first message'); $log->store( message => 'message #2', tag => 'MY_TAG', level => 'carp', extra => ['this is an argument to the handler'], ); my @last_five_items = $log->retrieve(5); my @items = $log->retrieve( tag => qr/my_tag/i, message => qr/\d/, remove => 1, ); my @items = $log->final( level => qr/carp/, amount perl error logs => 2 ); my $first_error = $log->first() # croak with the last error on the stack $log->final->croak; # empty the stack $log->flush();DESCRIPTION Log::Message is a generic message storage mechanism. It allows you to store messages on a stack -- either shared or private -- and assign meta-data to it. Some meta-data will automatically be added for you, like a timestamp and a stack trace, but some can be filled in by the user, like a tag by which to identify it or group it, and a level at which to handle the message (for example, log it, or die with it) Log::Message also provides a powerful way of searching through items by regexes on messages, tags and level. Hierarchy There are 4 modules of interest when dealing with the Log::Message::* modules: Log::Message Log::Message provides a few methods to manipulate the stack it keeps. It has the option of keeping either a private or a public stack. More on this below. Log::Message::Item These are individual message items, which are objects that contain the user message as well as the meta-data described above. See the Log::Message::Item manpage to see how to extract this meta-data and how to work with the Item objects. You should never need to create your own Item objects, but knowing about their methods and accessors

through several errors and how they appear in the error log, and finally consider some ways in which we can use the error log to make debugging easier. As discussed in my last column (LJ, Issue 34, WWW section), debugging CGI programs is often more difficult than debugging their non-CGI counterparts, if only because our programs aren't interacting directly with the user's terminal. We have only one chance to get input from the user—when the program is invoked—and only one chance to send a response back to the user—just before the program terminates, in the HTML that our program creates. This difficulty is complicated further by the fact that running CGI programs correctly requires that a number of other items be in place. For example, you must set the permission bits correctly, the web server must be configured to serve CGI programs from your directory, and the correct version of Perl (if you are using Perl for your CGI tasks) must be installed. None of this is very difficult, and it's particularly uncomplicated when compared with the full administration of a Unix system, but it's not quite as simple as compiling and executing other, non-CGI programs.In the last article in this series, we looked at techniques that you can use when things go wrong. But what happens when all of the permissions and directories are set correctly and you still end up getting a mysterious error on your browser?The answer is that while web servers send a generic error message back to the user's web browser, they also keep an “error log,” a file into which information about each error is placed. This month, we will examine the error log to see what it contains, look through several errors and how they appear in the error log, and finally consider some ways in which we can use the error log to make debugging easier.Why an Error Log?As Unix programmers are well aware, programs typically have at their disposal three basic file descriptors: standard input (stdin), standard output (stdout), and standard error (stderr).Standard input is typically associated with the user's keyboard; when you are entering text in Emacs or similar program, the program is probably collecting your k

 

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