Hi Expert, I am using the PERL language with the PostgreSQL (...) however yesterday we faced the issue where PARL had sent the SIGALRM signal

First, to nitpick a bit, The Language is called "Perl" while the binary is called "perl" or "perl.exe", but that's just flavours. End of nitpick.

Most likely, your embedded perl procedure got a SIGALRM from somwhere else, terminated, and sent that signal upstream where you could see it. In your code, there isn't anything handling an ALARM signal. To debug, set $SIG{ALRM} to some subroutine which reports its arguments, probably along with other stuff, like timestamps or the state of some (global or local) variables or structures:

CREATE OR REPLACE FUNCTION sendclaimcoversheet(
    text,
    text)
  RETURNS integer AS
$BODY$

    use strict;
    use warnings;
    use SOAP::Lite;
    use Try::Tiny;
    use Time::Piece;
    local $SIG{ALRM} = sub {
        die "function sendclaimcoversheet caught ALRM with:\n(",
            join( ",",@_)),")\n";
    };
[download]

You should see the message "function sendclaimcoversheet caught ALRM" in the place where STDERR is collected. Go on from there.