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∞ Log file error histogram analysis
#!/usr/bin/python # Useful spotting patterns in errors logged to files. Intended to be used # on rolled log files where the filename contains the date or some other # unique index or sequence. # # Example: # foo-2009-04-23.log # foo-2009-04-24.log # foo-2009-04-25.log # # Use grep to generate the input for this script. Use a pattern which will # match a variety of possible events. This works best when only one such # event is reported per line. # # Use the '-o' flag to output only the matched section: # # > grep -o "\b\w*Exception\b" * # # foo-2009-04-23.log:RuntimeException # foo-2009-04-23.log:IOException # foo-2009-04-23.log:IOException # foo-2009-04-23.log:IOException # foo-2009-04-24.log:FileNotFoundException # foo-2009-04-24.log:IOException # foo-2009-04-25.log:OutOfMemoryException # # Pipe this output to this script and you will get cross-referenced # histograms of: # # By input file (date): # Count for each error type # # By Error type: # Count for each day of ocurrence # # Number of errors (per file/date) - descending order # # Number of errors (per error type) - descending order import sys from math import log date_exception = dict() exception_date = dict() exception_all = dict() date_all = dict() def splitlines(): input = sys.stdin.readlines() for line in input: (date, exception) = line.strip().split(":") if (not date_all.has_key(date)): date_all[date] = 0 date_all[date] += 1 if (not exception_all.has_key(exception)): exception_all[exception] = 0 exception_all[exception] += 1 if (not date_exception.has_key(date)): date_exception[date] = dict() count_map = date_exception[date] if (not count_map.has_key(exception)): count_map[exception] = 0 count_map[exception] += 1 if (not exception_date.has_key(exception)): exception_date[exception] = dict() count_map = exception_date[exception] if (not count_map.has_key(date)): count_map[date] = 0 count_map[date] += 1 def print_bar(prefix, label, value): print prefix + "%-30s (%5d) %s" % (label, value, "#" * int(log(value+1)*3)) if __name__ == '__main__': splitlines() print "\n" for k in date_exception.keys(): d = date_exception[k] print k l = sorted(d.iteritems(), key=lambda (k,v): (v,k), reverse=True) for item in l: print_bar(" ", item[0], item[1]) print "\n" for k in exception_date.keys(): d = exception_date[k] print k l = sorted(d.iteritems(), key=lambda (k,v): (v,k), reverse=True) for item in l: print_bar(" ", item[0], item[1]) print "\n" for s in sorted(exception_all.iteritems(), key=lambda (k,v): (v,k), reverse=True): print_bar("", s[0], s[1]) print "\n" for s in sorted(date_all.iteritems(), key=lambda (k,v): (v,k), reverse=True): print_bar("", s[0], s[1])