You might want to use sysread instead of my $data = <$fh>. See sysread and syswrite in tcp sockets for example. 
# as a start change 
 my $line = <$fh>;
 #to 
 sysread $fh, my $line, 1024;,

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The basic issue is that <$fh> does a buffered read from the socket. It won't return from the read call until $/ (defaults to "\n") is encountered on the channel. IO::Select::can_read just means that there is data on the channel, it does not necessarily mean that there is a full record (defined as: a chunk terminated with an occurence of $/) waiting on the channel.
I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku ................... flash japh

In reply to Re: IO::Select - reading multiple lines by zentara
in thread IO::Select - reading multiple lines by nagalenoj

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