# Conditional statement with String

**URL:** <https://discuss.elastic.co/t/conditional-statement-with-string/209179>\
**Category:** Logstash\
**Created:** [November 24, 2019, 1:24pm UTC](https://discuss.elastic.co/t/conditional-statement-with-string/209179 "2019-11-24T13:24:54Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![gyana\_nayak](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/gyana_nayak/32/56498_2.png) [@gyana\_nayak](https://discuss.elastic.co/u/gyana_nayak)\
**Post date:** [November 24, 2019, 1:24pm UTC](https://discuss.elastic.co/t/conditional-statement-with-string/209179/1 "2019-11-24T13:24:55Z")

</div>

I have below sample log lines in same file

```auto
2019-11-23T14:38:43.495 backendorg [http-nio-8080-exec-45] INFO http-nio-8080-exec-45 SessionController http://localhost:8080/ABC/session/login abc.nayak@zinier.com backendorg

2019-11-23T14:38:44.235 backendorg [http-nio-8080-exec-45] INFO http-nio-8080-exec-45 SessionController userSession: backendorg 16CFAFCCFB14D9A3 16E978545E17BFEC 16E978545E1452FF

```

below config file i am using

```auto
    input {
      file {
            tags => ["stacktrace"]
            type => "error_logs"
            path => ["/Users/znrind-a0053/Downloads/logs/zapp-audit.log"]
            start_position => "beginning"
            sincedb_path => "/tmp/sincedb_file"
            codec => multiline {
            pattern => "^%{TIMESTAMP_ISO8601} "
            negate => true
            what => previous
            }
      }

    }
    filter {

      if "userSession" in [message]{
        grok {
        match => [ "message",
                 "%{TIMESTAMP_ISO8601:timestamp_match} %{USERNAME:orgId} (\[%{DATA:thread}\])?( )?%{LOGLEVEL:level}%{SPACE}%{USERNAME:zhost} %{JAVAFILE:javaClass} %{URI:url}%{SPACE}(?<email>[\w.+=:-]+@[0-9A-Za-z][0-9A-Za-z-]{0,62}(?:[.](?:[0-9A-Za-z][0-9A-Za-z‌​-]{0,62}))*)%{SPACE}%{USERNAME:orgnisation}"]
          }
      } else {

      grok {
      match => [ "message",
               "%{TIMESTAMP_ISO8601:timestamp_match} %{USERNAME:orgId} (\[%{DATA:thread}\])?( )?%{LOGLEVEL:level}%{SPACE}%{USERNAME:zhost} %{JAVACLASS:javaClass} %{USERNAME:logmessage}:?%{SPACE}%{USERNAME:orgnisation}%{SPACE}%{USERNAME:loginUserId}%{SPACE}%{USERNAME:sessionId}%{SPACE}%{USERNAME:txnId}"]
        }
      }
    }
    output {
        elasticsearch {
            hosts => "localhost"
            index => "logs"
        }
        stdout{codec => json}
    }

But receiving GROK parser error. Don't know what is wrong with above config file.
```

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 22, 2019, 1:24pm UTC](https://discuss.elastic.co/t/conditional-statement-with-string/209179/2 "2019-12-22T13:24:57Z")

</div>

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