# CSV filter parsing errors

**URL:** <https://discuss.elastic.co/t/csv-filter-parsing-errors/120789>\
**Category:** Logstash\
**Created:** [February 21, 2018, 8:44am UTC](https://discuss.elastic.co/t/csv-filter-parsing-errors/120789 "2018-02-21T08:44:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ranganath\_nangineni](https://avatars.discourse-cdn.com/v4/letter/r/3ec8ea/32.png) [@ranganath\_nangineni](https://discuss.elastic.co/u/ranganath_nangineni)\
**Post date:** [February 21, 2018, 8:44am UTC](https://discuss.elastic.co/t/csv-filter-parsing-errors/120789/1 "2018-02-21T08:44:21Z")

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Hi

I am getting the below errors while parsing using CSV filter

[2018-02-21T08:30:48,657][WARN][logstash.filters.csv] Error parsing csv {:field=\>"filename", :source=\>["CNT415653", "CNT415653"], :exception=\>#\<NoMethodError: private method `gets' called for ["CNT415653", "CNT415653"]:Array>} [2018-02-21T08:30:48,709][WARN][logstash.filters.csv] Error parsing csv {:field=>"filename", :source=>["CNT2704692", "CNT2704692"], :exception=>#<NoMethodError: private method`gets' called for ["CNT2704692", "CNT2704692"]:Array\>}  
[2018-02-21T08:30:48,712][WARN][logstash.filters.csv] Error parsing csv {:field=\>"filename", :source=\>["CNT2721639", "CNT2721639"], :exception=\>#\<NoMethodError: private method `gets' called for ["CNT2721639", "CNT2721639"]:Array>} [2018-02-21T08:30:48,766][WARN][logstash.filters.csv] Error parsing csv {:field=>"filename", :source=>"CNT2495746", :exception=>java.lang.ClassCastException} [2018-02-21T08:30:48,783][WARN][logstash.filters.csv] Error parsing csv {:field=>"filename", :source=>"CNT2101827", :exception=>java.lang.ClassCastException} [2018-02-21T08:30:48,786][WARN][logstash.filters.csv] Error parsing csv {:field=>"filename", :source=>["CNT1865927", "CNT1865927"], :exception=>#<NoMethodError: private method`gets' called for ["CNT1865927", "CNT1865927"]:Array\>}

# CSV filter

if [filename]{  
csv { source =\> "filename"  
separator =\> ","  
columns =\> ["[docname1]","[docname2]"]  
#target =\> "docname1"  
}  
}

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<div class="post-metadata">

**Author:** ![paz](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/paz/32/28003_2.png) [@paz](https://discuss.elastic.co/u/paz)\
**Post date:** [February 21, 2018, 5:01pm UTC](https://discuss.elastic.co/t/csv-filter-parsing-errors/120789/2 "2018-02-21T17:01:28Z")

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Your _filename_ field is an Array and not a String, as noted by the errors. Can you post a sample input line?

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<div class="post-metadata">

**Author:** ![ranganath\_nangineni](https://avatars.discourse-cdn.com/v4/letter/r/3ec8ea/32.png) [@ranganath\_nangineni](https://discuss.elastic.co/u/ranganath_nangineni)\
**Post date:** [February 22, 2018, 6:04am UTC](https://discuss.elastic.co/t/csv-filter-parsing-errors/120789/3 "2018-02-22T06:04:59Z")

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yes. It is an array. I have changed the filtering as below and it worked. Thanks.

csv {  
source =\> "[filename][0]"  
separator =\> ","  
columns =\> ["[docname]","[docname1]"]  
#skip\_empty\_rows =\> true  
skip\_empty\_columns =\> true  
}

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<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:** [March 22, 2018, 6:05am UTC](https://discuss.elastic.co/t/csv-filter-parsing-errors/120789/4 "2018-03-22T06:05:06Z")

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