Using Multiple IF conditionals in Filter

am getting output if i have all three (CREATION_DATE,SUBMITTED_DATE,LAST_MODIFIED_DATE) in date format.If any is STRING am not getting that log file in my output.
for ex:
my input is

12-JUL-13 AM,12-JUL-13 PM,12-JUL-13 PM
14-JUL-13 AM,11-JUL-13 PM
my output will come successfully for
12-JUL-13 AM,12-JUL-13 PM,12-JUL-13 PM but NOT FOR 2nd line

In Simple,Logstash is indexing only when three if clauses have dates.
Help me out.THanks in advance!!

I suggest you edit your post and move it to the Logstash category since it's a Logstash question.

Thanks magnus.

sorry to trouble friends.
As am new and don't know anyone to guide me about logstash expect this forum.

But right now am getting
"LogStash::ConfigurationError" it is like this. logstash-2.4.0/vendor/bundle/jruby/1.9/gems/logstash-filter-mutate-2.0.6/lib/logstash/filters/mutate.rb:192:in register'" and "org/jruby/Ruby each
This errors i am getting with same config file as provided above

I don't think you're using exactly the configuration that you've posted before. What do your mutate filters look like?