# Logstash error netflow plugin
**URL:** https://discuss.elastic.co/t/logstash-error-netflow-plugin/103809
**Category:** Logstash
**Created:** [October 13, 2017, 2:41am UTC](https://discuss.elastic.co/t/logstash-error-netflow-plugin/103809 "2017-10-13T02:41:37Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@bendersky](https://discuss.elastic.co/u/bendersky)
#### Post date: [October 13, 2017, 2:41am UTC](https://discuss.elastic.co/t/logstash-error-netflow-plugin/103809/1 "2017-10-13T02:41:37Z")
Hello Everyone,
Netflow plugin from RPM version 5.6.3-1 give error on incoming connection
```
Hardware: ASA5525, 8192 MB RAM, CPU Lynnfield 2394 MHz, 1 CPU (4 cores)
Cisco Adaptive Security Appliance Software Version 9.8(1)5
[root@ logstash]# rpm -qa | grep logstash
logstash-5.6.3-1.noarch
[root@ logstash]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)
[2017-10-12T22:16:59,556][INFO][logstash.pipeline] Pipeline main started
[2017-10-12T22:16:59,567][INFO][logstash.inputs.udp] Starting UDP listener {:address=>"0.0.0.0:9995"}
[2017-10-12T22:16:59,608][INFO][logstash.inputs.udp] UDP listener started {:address=>"0.0.0.0:9995",
:receive_buffer_bytes=>"16777216", :queue_size=>"2000"}
[2017-10-12T22:16:59,780][INFO][logstash.agent] Successfully started Logstash API endpoint
{:port=>9600}
[2017-10-12T22:17:26,060][ERROR][logstash.inputs.udp] Exception in inputworker {"exception"=>#
, "backtrace"=>
["/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/registry.rb:41:in `lookup'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/sanitize.rb:19:in `initialize'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/sanitize.rb:49:in `initialize'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/sanitize.rb:87:in `add_field'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/struct.rb:371:in `sanitize_fields'",
"org/jruby/RubyArray.java:1613:in `each'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/struct.rb:370:in `sanitize_fields'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/sanitize.rb:266:in `sanitize_fields'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/sanitize.rb:283:in `sanitize'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/sanitize.rb:264:in
`sanitize_fields'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/struct.rb:369:in
`sanitize_fields'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/struct.rb:345:in
`sanitize_parameters!'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/sanitize.rb:302:in `sanitize!'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/sanitize.rb:210:in `initialize'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/sanitize.rb:192:in `sanitize'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/base.rb:302:in `extract_args'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/base.rb:249:in `extract_args'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/base.rb:81:in `initialize'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/warnings.rb:21:in `initialize_with_warning'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-codec-netflow
3.5.2/lib/logstash/codecs/netflow.rb:215:in `decode_netflow9'", "org/jruby/RubyKernel.java:1242:in `catch'", "
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-codec-netflow-
3.5.2/lib/logstash/codecs/netflow.rb:179:in `decode_netflow9'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/array.rb:208:in `each'",
"org/jruby/RubyArray.java:1613:in `each'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/array.rb:208:in `each'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-codec-
netflow-3.5.2/lib/logstash/codecs/netflow.rb:178:in `decode_netflow9'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-codec-netflow-
3.5.2/lib/logstash/codecs/netflow.rb:117:in `decode'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-2.4.1/lib/bindata/array.rb:208:in `each'",
"org/jruby/RubyArray.java:1613:in `each'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/bindata-
2.4.1/lib/bindata/array.rb:208:in `each'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-codec-
netflow-3.5.2/lib/logstash/codecs/netflow.rb:113:in `decode'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-
3.1.2/lib/logstash/inputs/udp.rb:118:inbox_tray: `inputworker'",
"/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-3.1.2/lib/logstash/inputs/udp.rb:89:in
`udp_listener'"]}
```
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 10, 2017, 2:42am UTC](https://discuss.elastic.co/t/logstash-error-netflow-plugin/103809/2 "2017-11-10T02:42:04Z")
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