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From william <yin...@gmail.com>
Subject Fwd: mod_perl interactive debugging
Date Sun, 01 Jun 2008 17:30:33 GMT
---------- Forwarded message ----------
From: william <yingun@gmail.com>
Date: Jun 1, 2008 6:11 PM
Subject: Re: mod_perl interactive debugging
To: Fred Moyer <fred@redhotpenguin.com>


On 6/1/08, william <yingun@gmail.com> wrote:
 > On 6/1/08, william <yingun@gmail.com> wrote:
 >  > On 6/1/08, Fred Moyer <fred@redhotpenguin.com> wrote:
 >  >  > william wrote:
 >  >  >
 >  >  > > On 5/29/08, william <yingun@gmail.com> wrote:
 >  >  > >
 >  >  > > > On 5/29/08, Fred Moyer <fred@redhotpenguin.com> wrote:
 >  >  > > >  > william wrote:
 >  >  > > >  >
 >  >  > > >  > > On 5/29/08, Perrin Harkins <perrin@elem.com>
wrote:
 >  >  > > >  > >
 >  >  > > >  > > > On Wed, May 28, 2008 at 3:33 AM, william <yingun@gmail.com>
 >  >  > wrote:
 >  >  > > >  > > >
 >  >  > > >  > > I put the following lines at the top of my startup.pl
script
 >  >  > > >  > > use APR::Pool (); #specific for mod_perl 2
 >  >  > > >  > > use Apache::DB ();
 >  >  > > >  > > Apache::DB->init();
 >  >  > > >  > >
 >  >  > > >  >
 >  >  > > >  >  Can you show us the part of httpd.conf where you call
startup.pl?
 >  >  > > >  >
 >  >  > > >  >  I always place my debugger calls before any other modules
load,
 >  >  > usually
 >  >  > > >  > right after mod_perl.so is loaded.
 >  >  > > >
 >  >  > > >
 >  >  > > > Thanks for the prompt reply, here it is.
 >  >  > > >
 >  >  > > >  /etc/apache2/httpd.conf
 >  >  > > >
 >  >  > > >  <Directory /var/www/cgi-bin>
 >  >  > > >           Options +ExecCGI
 >  >  > > >           AddHandler cgi-script cgi pl
 >  >  > > >  </Directory>
 >  >  > > >
 >  >  > > >  ServerName localhost
 >  >  > > >
 >  >  > > >
 >  >  > > >  # Alias /modperl/ /var/www/modperl/
 >  >  > > >
 >  >  > > >  # <IfDefine PERLDB>
 >  >  > > >  # <Perl>
 >  >  > > >  #      use APR::Pool ();
 >  >  > > >  #       use Apache::DB ();
 >  >  > > >  #       Apache::DB->init;
 >  >  > > >
 >  >  > > >  #       warn "PERLDB executed";
 >  >  > > >  #     </Perl>
 >  >  > > >  #     <Location /modperl/>
 >  >  > > >  #       PerlFixupHandler Apache::DB
 >  >  > > >  #     </Location>
 >  >  > > >  # </IfDefine>
 >  >  > > >
 >  >  > > >
 >  >  > > >  #The startup script
 >  >  > > >  PerlRequire '/var/www/modperl/Apache2/startup.pl'
 >  >  > > >
 >  >  > > >
 >  >  > >
 >  >  >
 >  >  >  I didn't see a LodModule directive in there anywhere - do
you have a line
 >  >  > like 'LoadModule perl_module modules/mod_perl.so'?
 >  >  >
 >  >  >  It looked like you were using mod_perl2, so it is very
likely that you have
 >  >  > that line in there somewhere (I don't know of anyone who has
done a static
 >  >  > build with mp2.
 >  >  >
 >  >  >
 >  >  > > hello, I am still looking for solution. When command
 >  >  > > sudo apache2 -X  -k restart
 >  >  > > The debugger would immediately startup at this shell ?
 >  >  > >
 >  >  >
 >  >  >  The debugger will start once the first request to the server is made.
 >  >  >
 >  >  >
 >  >
 >  >
 >  > My apache configuration file is not just at the httpd.conf , I also
 >  >  have the apache2.conf
 >  >
 >  >  I have this line in /etc/apache2/mods-enabled/perl.load
 >  >  LoadModule perl_module /usr/lib/apache2/modules/mod_perl.so
 >  >
 >  >  Yes, I am using
 >  >  mod_perl/2.0.4
 >  >  Perl/v5.10.0
 >  >
 >  >  I am able to run my perl script under mod_perl, without any problem.
 >  >
 >  >
 >  >  > The debugger will start once the first request to the server is made.
 >  >
 >  >
 >  > So the debugger would appear in which shell ?
 >  >
 >  >  I only get to see the debugging process in /var/log/apache2/error.log
 >  >  , but not able to have interactive debugging feature.
 >  >
 >  >  Thanks.
 >  >
 >  >
 >  >  apache2.conf
 >  >  #
 >  >  # Based upon the NCSA server configuration files originally by
Rob McCool.
 >  >  #
 >  >  # This is the main Apache server configuration file.  It contains the
 >  >  # configuration directives that give the server its instructions.
 >  >  # See http://httpd.apache.org/docs/2.2/ for detailed information about
 >  >  # the directives.
 >  >  #
 >  >  # Do NOT simply read the instructions in here without understanding
 >  >  # what they do.  They're here only as hints or reminders.  If
you are unsure
 >  >  # consult the online docs. You have been warned.
 >  >  #
 >  >  # The configuration directives are grouped into three basic sections:
 >  >  #  1. Directives that control the operation of the Apache
server process as a
 >  >  #     whole (the 'global environment').
 >  >  #  2. Directives that define the parameters of the 'main' or
'default' server,
 >  >  #     which responds to requests that aren't handled by a virtual host.
 >  >  #     These directives also provide default values for the settings
 >  >  #     of all virtual hosts.
 >  >  #  3. Settings for virtual hosts, which allow Web requests to be sent to
 >  >  #     different IP addresses or hostnames and have them handled by the
 >  >  #     same Apache server process.
 >  >  #
 >  >  # Configuration and logfile names: If the filenames you specify for many
 >  >  # of the server's control files begin with "/" (or "drive:/"
for Win32), the
 >  >  # server will use that explicit path.  If the filenames do *not* begin
 >  >  # with "/", the value of ServerRoot is prepended -- so
 >  >  "/var/log/apache2/foo.log"
 >  >  # with ServerRoot set to "" will be interpreted by the
 >  >  # server as "//var/log/apache2/foo.log".
 >  >  #
 >  >
 >  >  ### Section 1: Global Environment
 >  >  #
 >  >  # The directives in this section affect the overall operation of Apache,
 >  >  # such as the number of concurrent requests it can handle or where it
 >  >  # can find its configuration files.
 >  >  #
 >  >
 >  >  #
 >  >  # ServerRoot: The top of the directory tree under which the server's
 >  >  # configuration, error, and log files are kept.
 >  >  #
 >  >  # NOTE!  If you intend to place this on an NFS (or otherwise network)
 >  >  # mounted filesystem then please read the LockFile
documentation (available
 >  >  # at <URL:http://httpd.apache.org/docs-2.1/mod/mpm_common.html#lockfile>);
 >  >  # you will save yourself a lot of trouble.
 >  >  #
 >  >  # Do NOT add a slash at the end of the directory path.
 >  >  #
 >  >  ServerRoot "/etc/apache2"
 >  >
 >  >  #
 >  >  # The accept serialization lock file MUST BE STORED ON A LOCAL DISK.
 >  >  #
 >  >  #<IfModule !mpm_winnt.c>
 >  >  #<IfModule !mpm_netware.c>
 >  >  LockFile /var/lock/apache2/accept.lock
 >  >  #</IfModule>
 >  >  #</IfModule>
 >  >
 >  >  #
 >  >  # PidFile: The file in which the server should record its process
 >  >  # identification number when it starts.
 >  >  # This needs to be set in /etc/apache2/envvars
 >  >  #
 >  >  PidFile /var/run/apache2.pid
 >  >
 >  >  #
 >  >  # Timeout: The number of seconds before receives and sends time out.
 >  >  #
 >  >  Timeout 300
 >  >
 >  >  #
 >  >  # KeepAlive: Whether or not to allow persistent connections (more than
 >  >  # one request per connection). Set to "Off" to deactivate.
 >  >  #
 >  >  KeepAlive On
 >  >
 >  >  #
 >  >  # MaxKeepAliveRequests: The maximum number of requests to allow
 >  >  # during a persistent connection. Set to 0 to allow an unlimited amount.
 >  >  # We recommend you leave this number high, for maximum performance.
 >  >  #
 >  >  MaxKeepAliveRequests 100
 >  >
 >  >  #
 >  >  # KeepAliveTimeout: Number of seconds to wait for the next
request from the
 >  >  # same client on the same connection.
 >  >  #
 >  >  KeepAliveTimeout 15
 >  >
 >  >  ##
 >  >  ## Server-Pool Size Regulation (MPM specific)
 >  >  ##
 >  >
 >  >  # prefork MPM
 >  >  # StartServers: number of server processes to start
 >  >  # MinSpareServers: minimum number of server processes which are
kept spare
 >  >  # MaxSpareServers: maximum number of server processes which are
kept spare
 >  >  # MaxClients: maximum number of server processes allowed to start
 >  >  # MaxRequestsPerChild: maximum number of requests a server process serves
 >  >  <IfModule mpm_prefork_module>
 >  >     StartServers          5
 >  >     MinSpareServers       5
 >  >     MaxSpareServers      10
 >  >     MaxClients          150
 >  >     MaxRequestsPerChild   0
 >  >  </IfModule>
 >  >
 >  >  # worker MPM
 >  >  # StartServers: initial number of server processes to start
 >  >  # MaxClients: maximum number of simultaneous client connections
 >  >  # MinSpareThreads: minimum number of worker threads which are kept spare
 >  >  # MaxSpareThreads: maximum number of worker threads which are kept spare
 >  >  # ThreadsPerChild: constant number of worker threads in each
server process
 >  >  # MaxRequestsPerChild: maximum number of requests a server process serves
 >  >  <IfModule mpm_worker_module>
 >  >     StartServers          2
 >  >     MaxClients          150
 >  >     MinSpareThreads      25
 >  >     MaxSpareThreads      75
 >  >     ThreadsPerChild      25
 >  >     MaxRequestsPerChild   0
 >  >  </IfModule>
 >  >
 >  >  # These need to be set in /etc/apache2/envvars
 >  >  User www-data
 >  >  Group www-data
 >  >
 >  >  #
 >  >  # AccessFileName: The name of the file to look for in each directory
 >  >  # for additional configuration directives.  See also the AllowOverride
 >  >  # directive.
 >  >  #
 >  >
 >  >  AccessFileName .htaccess
 >  >
 >  >  #
 >  >  # The following lines prevent .htaccess and .htpasswd files from being
 >  >  # viewed by Web clients.
 >  >  #
 >  >  <Files ~ "^\.ht">
 >  >     Order allow,deny
 >  >     Deny from all
 >  >  </Files>
 >  >
 >  >  #
 >  >  # DefaultType is the default MIME type the server will use for a document
 >  >  # if it cannot otherwise determine one, such as from filename extensions.
 >  >  # If your server contains mostly text or HTML documents, "text/plain" is
 >  >  # a good value.  If most of your content is binary, such as applications
 >  >  # or images, you may want to use "application/octet-stream" instead to
 >  >  # keep browsers from trying to display binary files as though they are
 >  >  # text.
 >  >  #
 >  >  DefaultType text/plain
 >  >
 >  >
 >  >  #
 >  >  # HostnameLookups: Log the names of clients or just their IP addresses
 >  >  # e.g., www.apache.org (on) or 204.62.129.132 (off).
 >  >  # The default is off because it'd be overall better for the net if people
 >  >  # had to knowingly turn this feature on, since enabling it means that
 >  >  # each client request will result in AT LEAST one lookup request to the
 >  >  # nameserver.
 >  >  #
 >  >  HostnameLookups Off
 >  >
 >  >  # ErrorLog: The location of the error log file.
 >  >  # If you do not specify an ErrorLog directive within a <VirtualHost>
 >  >  # container, error messages relating to that virtual host will be
 >  >  # logged here.  If you *do* define an error logfile for a <VirtualHost>
 >  >  # container, that host's errors will be logged there and not here.
 >  >  #
 >  >
 >  > ErrorLog /var/log/apache2/error.log
 >  >
 >  >  #
 >  >
 >  > # LogLevel: Control the number of messages logged to the error_log.
 >  >
 >  > # Possible values include: debug, info, notice, warn, error, crit,
 >  >  # alert, emerg.
 >  >  #
 >  >  LogLevel warn
 >  >
 >  >
 >  > # Include module configuration:
 >  >  Include /etc/apache2/mods-enabled/*.load
 >  >  Include /etc/apache2/mods-enabled/*.conf
 >  >
 >  >  # Include all the user configurations:
 >  >  Include /etc/apache2/httpd.conf
 >  >
 >  >  # Include ports listing
 >  >  Include /etc/apache2/ports.conf
 >  >
 >  >  #
 >  >  # The following directives define some format nicknames for use with
 >  >  # a CustomLog directive (see below).
 >  >  # If you are behind a reverse proxy, you might want to change %h into
 >  >  %{X-Forwarded-For}i
 >  >  #
 >  >  LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\"
 >  >  \"%{User-Agent}i\"" combined
 >  >  LogFormat "%h %l %u %t \"%r\" %>s %b" common
 >  >  LogFormat "%{Referer}i -> %U" referer
 >  >  LogFormat "%{User-agent}i" agent
 >  >
 >  >  #
 >  >  # ServerTokens
 >  >  # This directive configures what you return as the Server HTTP response
 >  >  # Header. The default is 'Full' which sends information about the OS-Type
 >  >  # and compiled in modules.
 >  >  # Set to one of:  Full | OS | Minor | Minimal | Major | Prod
 >  >  # where Full conveys the most information, and Prod the least.
 >  >  #
 >  >  ServerTokens Full
 >  >
 >  >  #
 >  >  # Optionally add a line containing the server version and virtual host
 >  >  # name to server-generated pages (internal error documents, FTP directory
 >  >  # listings, mod_status and mod_info output etc., but not CGI generated
 >  >  # documents or custom error documents).
 >  >  # Set to "EMail" to also include a mailto: link to the ServerAdmin.
 >  >  # Set to one of:  On | Off | EMail
 >  >  #
 >  >  ServerSignature On
 >  >
 >  >
 >  >
 >  >  #
 >  >  # Customizable error responses come in three flavors:
 >  >  # 1) plain text 2) local redirects 3) external redirects
 >  >  #
 >  >  # Some examples:
 >  >  #ErrorDocument 500 "The server made a boo boo."
 >  >  #ErrorDocument 404 /missing.html
 >  >  #ErrorDocument 404 "/cgi-bin/missing_handler.pl"
 >  >  #ErrorDocument 402 http://www.example.com/subscription_info.html
 >  >  #
 >  >
 >  >  #
 >  >  # Putting this all together, we can internationalize error responses.
 >  >  #
 >  >  # We use Alias to redirect any /error/HTTP_<error>.html.var response to
 >  >  # our collection of by-error message multi-language collections.  We use
 >  >  # includes to substitute the appropriate text.
 >  >  #
 >  >  # You can modify the messages' appearance without changing any of the
 >  >  # default HTTP_<error>.html.var files by adding the line:
 >  >  #
 >  >  #   Alias /error/include/ "/your/include/path/"
 >  >  #
 >  >  # which allows you to create your own set of files by starting with the
 >  >  # /usr/share/apache2/error/include/ files and copying them to
 >  >  /your/include/path/,
 >  >  # even on a per-VirtualHost basis.  The default include files
will display
 >  >  # your Apache version number and your ServerAdmin email address
regardless
 >  >  # of the setting of ServerSignature.
 >  >  #
 >  >  # The internationalized error documents require mod_alias, mod_include
 >  >  # and mod_negotiation.  To activate them, uncomment the
following 30 lines.
 >  >
 >  >  #    Alias /error/ "/usr/share/apache2/error/"
 >  >  #
 >  >  #    <Directory "/usr/share/apache2/error">
 >  >  #        AllowOverride None
 >  >  #        Options IncludesNoExec
 >  >  #        AddOutputFilter Includes html
 >  >  #        AddHandler type-map var
 >  >  #        Order allow,deny
 >  >  #        Allow from all
 >  >  #        LanguagePriority en cs de es fr it nl sv pt-br ro
 >  >  #        ForceLanguagePriority Prefer Fallback
 >  >  #    </Directory>
 >  >  #
 >  >  #    ErrorDocument 400 /error/HTTP_BAD_REQUEST.html.var
 >  >  #    ErrorDocument 401 /error/HTTP_UNAUTHORIZED.html.var
 >  >  #    ErrorDocument 403 /error/HTTP_FORBIDDEN.html.var
 >  >  #    ErrorDocument 404 /error/HTTP_NOT_FOUND.html.var
 >  >  #    ErrorDocument 405 /error/HTTP_METHOD_NOT_ALLOWED.html.var
 >  >  #    ErrorDocument 408 /error/HTTP_REQUEST_TIME_OUT.html.var
 >  >  #    ErrorDocument 410 /error/HTTP_GONE.html.var
 >  >  #    ErrorDocument 411 /error/HTTP_LENGTH_REQUIRED.html.var
 >  >  #    ErrorDocument 412 /error/HTTP_PRECONDITION_FAILED.html.var
 >  >  #    ErrorDocument 413 /error/HTTP_REQUEST_ENTITY_TOO_LARGE.html.var
 >  >  #    ErrorDocument 414 /error/HTTP_REQUEST_URI_TOO_LARGE.html.var
 >  >  #    ErrorDocument 415 /error/HTTP_UNSUPPORTED_MEDIA_TYPE.html.var
 >  >  #    ErrorDocument 500 /error/HTTP_INTERNAL_SERVER_ERROR.html.var
 >  >  #    ErrorDocument 501 /error/HTTP_NOT_IMPLEMENTED.html.var
 >  >  #    ErrorDocument 502 /error/HTTP_BAD_GATEWAY.html.var
 >  >  #    ErrorDocument 503 /error/HTTP_SERVICE_UNAVAILABLE.html.var
 >  >  #    ErrorDocument 506 /error/HTTP_VARIANT_ALSO_VARIES.html.var
 >  >
 >  >
 >  >
 >  >  # Include of directories ignores editors' and dpkg's backup files,
 >  >  # see README.Debian for details.
 >  >
 >  >  # Include generic snippets of statements
 >  >  Include /etc/apache2/conf.d/
 >  >
 >  >  # Include the virtual host configurations:
 >  >  Include /etc/apache2/sites-enabled/
 >  >
 >  >
 >  >  # Load the mod_perl
 >  >  #LoadModule perl_module /usr/lib/apache2/modules/mod_perl.so
 >  >
 >
 >
 >
 > I am almost discouraged, but finally it works, I don't why I need to
 >  call Apache::DB->handler first, then disable it, and it works.
 >  Also maybe I am using ModPerl::RegistryPrefork instead of ModPerl::Registry
 >
 >  Thanks
 >



Hello, my debugger is working fine now under mod_perl, I can exit from
debugger just
 like normal 'q' command. But then the apache is still in debugging
 mode and single process. So I have to press CTRL+Z to get out to the
 normal shell prompt. But whenever I do that my apache would longer to
 start again. I didn't see any text being logged in the log file.

 How can I have a proper exit from the debugger as well as the apache
 to start a normal server ? Thanks


 william

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