# Upgrarding from logstash 5.6.16 to 6.8 results in errors for logstash tcp input plugin

**URL:** <https://discuss.elastic.co/t/upgrarding-from-logstash-5-6-16-to-6-8-results-in-errors-for-logstash-tcp-input-plugin/270316>\
**Category:** Logstash\
**Created:** [April 16, 2021, 1:19am UTC](https://discuss.elastic.co/t/upgrarding-from-logstash-5-6-16-to-6-8-results-in-errors-for-logstash-tcp-input-plugin/270316 "2021-04-16T01:19:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mchoudhary](https://avatars.discourse-cdn.com/v4/letter/m/3be4f8/32.png) [@mchoudhary](https://discuss.elastic.co/u/mchoudhary)\
**Post date:** [April 16, 2021, 1:19am UTC](https://discuss.elastic.co/t/upgrarding-from-logstash-5-6-16-to-6-8-results-in-errors-for-logstash-tcp-input-plugin/270316/1 "2021-04-16T01:19:43Z")

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After upgrading the logstash version from 5.6.16 to 6.8, the logstash tcp plugin from 4.2.2 to 5.2.2

After upgrade, we do see the following errors in the logstash logs:  
[2021-04-16T01:14:50,392][ERROR][logstash.inputs.tcp] Error in Netty pipeline: io.netty.handler.codec.DecoderException: javax.net.ssl.SSLHandshakeException: error:10000418:SSL routines:OPENSSL\_internal:TLSV1\_ALERT\_UNKNOWN\_CA

The configuration for tcp input plugin is as follows:

```auto
# 08-input-tls-syslog-6514.conf
# This expects TLS syslog input on port 6514.
input {
  tcp {
    id => tls_syslog
    tags => ["input_tls", "syslog"]
    port => 6514
    ssl_enable => true
    ssl_cert => "/etc/pki/XXXX/sand-006-green.crt"
    ssl_extra_chain_certs => ["/etc/pki/XXXX/ca-bundle.crt", "/etc/pki/XXXX/XXXX-hosts-naw01.crt"]
    ssl_key => "/etc/pki/XXXX/sand-006-green.key"
    ssl_verify => false
    codec => plain {
      charset => "ISO8859-16"
    }
  }
}

```

The same configuration worked fine with logstash version 5.6.16.

Based on the changelogs for the http tcp plugin, no changes were needed during the upgrade of the plugin version from 4.2.2 to 5.2.2

---

<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:** [May 14, 2021, 1:19am UTC](https://discuss.elastic.co/t/upgrarding-from-logstash-5-6-16-to-6-8-results-in-errors-for-logstash-tcp-input-plugin/270316/2 "2021-05-14T01:19:45Z")

</div>

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