, :backtrace=>["org/jruby/RubyComparable.java:186:in `>'", "org/jruby/RubyString.java:1736:in `>'", "(eval):10315:in `block in initialize'", "org/jruby/RubyArray.java:1792:in `each'", "(eval):10313:in `block in initialize'", "(eval):10332:in `block in initialize'", "org/jruby/RubyArray.java:1792:in `each'", "(eval):10327:in `block in initialize'", "(eval):1687:in `block in filter_func'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:358:in `filter_batch'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:337:in `worker_loop'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:304:in `block in start_workers'"]}
[2019-04-11T20:38:34,540][ERROR][org.logstash.Logstash] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
```
tld seems to be working just fine. Here is a sample of what it shows when things run:
```
"tld" => {
"sld" => "digicert",
"trd" => "crl3",
"tld" => "com",
"domain" => "digicert.com",
"subdomain" => "crl3.digicert.com"
},
```
But if I try and do anything with the fields and/or subfields, LS crashes with the above error.
Running LS 6.7, logstash-filter-mutate (3.4.0), logstash-filter-tld (3.0.3), CentOS 6.x
Suggestions?
---
### Author:  [@reswob](https://discuss.elastic.co/u/reswob)
#### Post date: [April 22, 2019, 7:43pm UTC](https://discuss.elastic.co/t/logstash-crashes-with-comparison-of-string-with-0-failed/176516/2 "2019-04-22T19:43:00Z")
OK, I've been working on this for a while with tech support and my own testing. Here is the current situation:
Upgraded to LS 7.0
That changed the error above to 'no implicit conversion of nil into Integer'
But either way, I've narrowed the error down to below:
For THIS function:
```
if [site_rank] and [site_rank]!="" and [site_rank] > 0 {
mutate {
add_tag => ["top1M"]
}
}
```
if the site\_rank field has NOT been populated for some reason, I get the 'no implicit conversion of nil into Integer' error. And the conditional statements above do not seem to prevent the error.
Also tried
```
if [site_rank] and [site_rank]!="" {
if [site_rank] > 0 {
mutate {
add_tag => ["top1M"]
}
}
}
```
So, how do I check to see if site\_rank is nil?
Is this the solution: [Logstash convert Nil values into a number](https://discuss.elastic.co/t/logstash-convert-nil-values-into-a-number/104271)
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [April 22, 2019, 8:14pm UTC](https://discuss.elastic.co/t/logstash-crashes-with-comparison-of-string-with-0-failed/176516/3 "2019-04-22T20:14:47Z")
> [@reswob](#):
>
> if [site\_rank] and [site\_rank]!="" and [site\_rank] \> 0 {
That works for me if the site\_rank field does not exist. To get the exception site\_rank has to exist and be a string. Interestingly, although the first test short-circuits the rest, the second test does not. If site\_rank is set to "" then it get the exception.
The error message changed because pipeline.java\_execution is on by default in version 7. If you disable it in logstash.yml you will start getting "comparison of String with 0 failed" again.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 20, 2019, 8:14pm UTC](https://discuss.elastic.co/t/logstash-crashes-with-comparison-of-string-with-0-failed/176516/4 "2019-05-20T20:14:56Z")
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