The while (<DATA>){ line needs to read 
while (<LOG>){

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<DATA> file handle is a "special" one that points to the bit in your script following the __DATA__ marker. This is useful to demonstrate the data associated with code in a forum like this.

As suggested by others, it is good practice to close your file handle once you are finished with it. 

close LOG;

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In reply to Re^5: trouble parsing log file... by inman
in thread trouble parsing log file... by perl_geoff

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