[Dancer-users] Memcached beginners problem

[Alex Knowles]

This is due to a bug in the session package - there's an RT ticket about it here:

https://rt.cpan.org/Public/Bug/Display.html?id=69075

basically the init method is overloaded without calling super::init.

you can either do as the patch in the RT ticket says, or rename the init method import - then the memcache config is run at startup (see attached patch)

alex

________________________________________
From: dancer-users-bounces at perldancer.org [dancer-users-bounces at perldancer.org] On Behalf Of Flavio Poletti [polettix at gmail.com]
Sent: 26 September 2011 21:58
To: dancer-users at perldancer.org
Subject: Re: [Dancer-users] Memcached beginners problem

The "crash" depends on the fact that all warnings are promoted to fatal errors in the development environment.

It seems that you're getting a warning about a key that is not defined. It would help to see the code that you use to retrieve the stuff in the session, i.e. the calls to session().

Cheers,

   Flavio.

On Mon, Sep 26, 2011 at 4:59 PM, Niels Larsen <niels at genomics.dk<mailto:niels at genomics.dk>> wrote:
Greetings,

I, a Dancer newcomer, have trouble getting Dancer::Session::Memcached
to
work. All works with session Simple, but with memcached I get the error
below. The memcached server was started with ./memcached (responds on
port
11211) and the Cache::Memcached module is installed. The application was
started with just ./application.pl<http://application.pl> --environment development, and the
development.yml file has in it

session: "memcached"
memcached_servers: "127.0.0.1:11211<http://127.0.0.1:11211>"

I did not 'use Dancer::Session::Memcached' because documentation does
not say so, and I'm sure its a dumb mistake by me. But the crash is not
so informative, and the format of the listing could be also be improved:
module names (not file names) and line numbers should be at the left so
they line up, and the traceback should include application code. It only
shows Dancer code.

And a wish: the Messagepack library is the fastest serialization method,
I think, and I hope Dancer will support it some day. I use it already,
and Kyoto Tycoon for permanent storage, works well. Unlike Membase/cache
one can save pretty big strings, which reduces the number of times one
must touch the storage, which again speeds the whole thing.

Niels Larsen

http://genomics.dk

------------------------------------------------------------------------

Error 500
runtime error

Warning caught during route execution: Use of uninitialized value $key
in
concatenation (.) or string at
/home/donate/DONATE/Software/Package_installs/Perl_modules/lib/perl5/Cache/Memcached.pm line 521.

518     $exptime = int($exptime || 0);
519
520     local $SIG{'PIPE'} = "IGNORE" unless $FLAG_NOSIGNAL;
521     my $line = "$cmdname $self->{namespace}$key $flags $exptime $len
\r\n$val\r\n";
522
523     my $res = _write_and_read($self, $sock, $line);
524

------------------------------------------------------------------------



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