Re^5: Fast provider feeding slow consumer

Since there is still some queries that returns empty values,

Leandro, this appears to be a bug in IO::Socket::INET::Daemon, in as much as, it frequently calls the data callback when there is nothing to available read; and getline returns undef.

I do not have the time to debug that module; but the simple workaround to it, is to move one line of code in your callback. change this:

 23        callback => { data =>
 24             sub {
 25                 my ($io, $host) = @_;
 26                 chomp( my $line = <$io> );
 27                 return 0 unless $line;      ####### MOVE THIS LINE
+ UP AND TEST FOR DEFINEDNESS ###################
 28                 $Qout->enqueue( $line );    ## send work to listen
+er (is not sending to walker ?)
 29                 return !0;
 30             }
 31         },
[download]

To become this:

 23        callback => { data =>
 24             sub {
 25                 my ($io, $host) = @_;
 26                 return 0 unless defined $line;  ################ M
+OVED LINE #####################
 27                 chomp( my $line = <$io> );
 28                 $Qout->enqueue( $line );    ## send work to walker
 29                 return !0;
 30             }
 31         },
[download]

I think that should get you further.

(And yes, the comment was wrong!).

(And BTW: you really should get into the habit of using strict and my. Debugging would have been much simpler had your code been strict compliant.)

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority". I knew I was on the right track :)

In the absence of evidence, opinion is indistinguishable from prejudice.

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