How to find common errors in different log files?

[Reddi694325]

In my environment I got one scenario like have to find common errors in iis log, applog,apache log and db log. How to find it

Please help me on the same

Thanks in Advance

[nickhills]

Hi @Reddi694325
Many log types have a 'level' which is normally one of INFO/WARN/ERROR etc.
Some logs report a status code which indicates the outcome.

If you have installed the appropriate TA for your log type this should be extracted for you You need to identify those fields/tags/values and write a search to identify them.

(sourcetype=iis AND sc_status>=400) OR (sourcetype=myApp AND log_level=error)

[richgalloway]

What qualifies as a "common error" in three very different logs?

[Reddi694325]

Actually I am thinking is there any way to find by using codes like 404,500.............

three are different logs I know But code doesn't change I think.