Im having a error log file, which is having last 30 days error information and with time stamp when the error was occurred. Now how can we write a SEARCH string to get the last error appended to that error log file. I dont want to specify the date and search as I need to automate to run for every day.
Error Log File will be like
01-Feb-2014 09:09:12 Error Java custom error.
01-Feb-2014 09:30:30 Error Oracle error.
01-Feb-2014 14:45:30 Error Java error.
26-Feb-2014 09:09:12 Error Java custom error.
26-Feb-2014 09:30:30 Error Oracle error.
26-Feb-2014 14:45:30 Error Java error.
Is this possible that this search string automate to run for every day and then if any error then send an email.
Yes, basically you need to set up alert action for your search so the search will run once a day to check ERROR message (or any other search).
You can take a look at this alert documentation for detail.
Hope this help you get started
Well if you simply want to get the latest ERROR message, you just search like this:
your search | head 1
Splunk will return the result from latest to earliest in time order and if you add "head 1" you will get latest event.