# Cannot convert instance of class org.jruby.RubyTime to class java.lang.String"

**URL:** https://discuss.elastic.co/t/cannot-convert-instance-of-class-org-jruby-rubytime-to-class-java-lang-string/26477
**Category:** Logstash
**Created:** [July 29, 2015, 10:57am UTC](https://discuss.elastic.co/t/cannot-convert-instance-of-class-org-jruby-rubytime-to-class-java-lang-string/26477 "2015-07-29T10:57:16Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Anmol\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/eb9ed0/32.png) [@Anmol\_Gupta](https://discuss.elastic.co/u/Anmol_Gupta)
#### Post date: [July 29, 2015, 10:57am UTC](https://discuss.elastic.co/t/cannot-convert-instance-of-class-org-jruby-rubytime-to-class-java-lang-string/26477/1 "2015-07-29T10:57:16Z")

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filter {  
date {  
match =\> ["timestamp", "yyyy-MM-dd HH:mm:ss " , "ISO8601"]  
target =\> "@timestamp"  
}  
}

I am using this filter in my conf file for feeding data from postgresql to logstash and from logstash to elasticsearch but i am getting error " cannot convert instance of class org.jruby.RubyTime to  
class java.lang.String"," . As i have a column timestamp and logstash gives its own timestamp .. it is conflicting working of my code .. can anybody resolve this?

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### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 5:33am UTC](https://discuss.elastic.co/t/cannot-convert-instance-of-class-org-jruby-rubytime-to-class-java-lang-string/26477/2 "2017-07-06T05:33:30Z")

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