use strict;
use warnings;


while(<DATA>) {

    chomp;

    if ( /((?!Exception\s+Handler|ExceptionHandler).)*Exception/i ) {
	print "FOUND : $_\n";
    } 
}

__DATA__
Line1: Extension:  name="Exception Handler" point="ClientDebugGroupExtension" className="com.foo.bar.pluginfwk.extensions.DefaultDebugGroupExtension" instance=Not created params:( packages="com.foo.bar.common.ExceptionHandler;" level="Verbose" description="User interface unhandled exception handler" )
Line2: java.net.SocketException: Software caused connection abort: recv failed
Line3: com.mysql.jdbc.CommunicationsException
Line4: MESSAGE: Communications link failure due to underlying exception: