# Logstash upgrade error **URL:** \ **Category:** Logstash\ **Created:** [February 11, 2016, 5:08pm UTC](https://discuss.elastic.co/t/logstash-upgrade-error/41528 "2016-02-11T17:08:33Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![met3or](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/met3or/32/17232_2.png) [@met3or](https://discuss.elastic.co/u/met3or)\ **Post date:** [February 11, 2016, 5:08pm UTC](https://discuss.elastic.co/t/logstash-upgrade-error/41528/1 "2016-02-11T17:08:34Z")
Hello, We've had some trouble when upgrading logstash from version 2.1 =\> 2.2. The system we're running on is Ubuntu 14. Following the upgrade, the configuration failed. I had assumed there may be some syntax errors, so I tried to isolate which configuration file was the culprit to which I discovered the issue were with the output configuration. > output { > elasticsearch { > hosts =\> ["es01","es02","es03"] > workers =\> "30" > index =\> "%{[@metadata][beat]}-%{+YYYY.MM.dd}" > document\_type =\> "%{[@metadata][type]}" > } > stdout { codec =\> rubydebug } > } ^ configuration used, and when directly checked for error: > root@log01:/opt/logstash/bin# ./logstash --configtest -f /etc/logstash/conf.d/99-output.conf > The error reported is: > comparison of String with 1 failed I get the above error, and this is the error which appears in the logstash log, as well as the when trying to start the service. Any assistance would be useful, Some other steps I've taken include purging the install \*(apt-get purge) and re-installed with new configuration, still the same occurs. Kind regards, David ---
**Author:** ![met3or](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/met3or/32/17232_2.png) [@met3or](https://discuss.elastic.co/u/met3or)\ **Post date:** [February 12, 2016, 9:02am UTC](https://discuss.elastic.co/t/logstash-upgrade-error/41528/2 "2016-02-12T09:02:02Z")
Still working on this, trying to replicate issue on a openstack VM / see if it re-occurs on a different solution. If you require further information regarding the problem posted let me know, David ---
**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\ **Post date:** [February 12, 2016, 9:36am UTC](https://discuss.elastic.co/t/logstash-upgrade-error/41528/3 "2016-02-12T09:36:30Z")
```auto /opt/logstash/bin/logstash --configtest -f test.conf es01: unknown error {:class=>"Manticore::ResolutionFailure", :level=>:error} The error reported is: comparison of String with 1 failed ``` It looks like the Manticore library is trying to resolve the host names in DNS while the config file is parsed. That doesn't seem right. ---
**Author:** ![met3or](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/met3or/32/17232_2.png) [@met3or](https://discuss.elastic.co/u/met3or)\ **Post date:** [February 12, 2016, 9:52am UTC](https://discuss.elastic.co/t/logstash-upgrade-error/41528/4 "2016-02-12T09:52:26Z")
Thanks for taking a look Magnus, I've gone ahead and attempted to remove DNS resolution from the process and switched out my hostnames for IP addresses: root@eslog01:/etc/logstash/conf.d# /opt/logstash/bin/logstash --configtest -f /etc/logstash/conf.d/99-output.conf The error reported is: comparison of String with 1 failed Still getting errors, I've added verbose and debug flags in an attempt to get more info: > ``` > root@eslog01:/etc/logstash/conf.d# /opt/logstash/bin/logstash --debug --verbose --configtest -f /etc/logstash/conf.d/99-output.conf > Using mapping template from {:path=>nil, :level=>:info} > Attempting to install template {:manage_template=>{"template"=>"logstash-*", "settings"=>{"index.refresh_interval"=>"5s"}, "mappings"=>{"_default_"=>{"_all"=>{"enabled"=>true, "omit_norms"=>true}, "dynamic_templates"=>[{"message_field"=>{"match"=>"message", "match_mapping_type"=>"string", "mapping"=>{"type"=>"string", "index"=>"analyzed", "omit_norms"=>true, "fielddata"=>{"format"=>"disabled"}}}}, {"string_fields"=>{"match"=>"*", "match_mapping_type"=>"string", "mapping"=>{"type"=>"string", "index"=>"analyzed", "omit_norms"=>true, "fielddata"=>{"format"=>"disabled"}, "fields"=>{"raw"=>{"type"=>"string", "index"=>"not_analyzed", "doc_values"=>true, "ignore_above"=>256}}}}}, {"float_fields"=>{"match"=>"*", "match_mapping_type"=>"float", "mapping"=>{"type"=>"float", "doc_values"=>true}}}, {"double_fields"=>{"match"=>"*", "match_mapping_type"=>"double", "mapping"=>{"type"=>"double", "doc_values"=>true}}}, {"byte_fields"=>{"match"=>"*", "match_mapping_type"=>"byte", "mapping"=>{"type"=>"byte", "doc_values"=>true}}}, {"short_fields"=>{"match"=>"*", "match_mapping_type"=>"short", "mapping"=>{"type"=>"short", "doc_values"=>true}}}, {"integer_fields"=>{"match"=>"*", "match_mapping_type"=>"integer", "mapping"=>{"type"=>"integer", "doc_values"=>true}}}, {"long_fields"=>{"match"=>"*", "match_mapping_type"=>"long", "mapping"=>{"type"=>"long", "doc_values"=>true}}}, {"date_fields"=>{"match"=>"*", "match_mapping_type"=>"date", "mapping"=>{"type"=>"date", "doc_values"=>true}}}, {"geo_point_fields"=>{"match"=>"*", "match_mapping_type"=>"geo_point", "mapping"=>{"type"=>"geo_point", "doc_values"=>true}}}], "properties"=>{"@timestamp"=>{"type"=>"date", "doc_values"=>true}, "@version"=>{"type"=>"string", "index"=>"not_analyzed", "doc_values"=>true}, "geoip"=>{"type"=>"object", "dynamic"=>true, "properties"=>{"ip"=>{"type"=>"ip", "doc_values"=>true}, "location"=>{"type"=>"geo_point", "doc_values"=>true}, "latitude"=>{"type"=>"float", "doc_values"=>true}, "longitude"=>{"type"=>"float", "doc_values"=>true}}}}}}}, :level=>:info} > New Elasticsearch output {:class=>"LogStash::Outputs::ElasticSearch", :hosts=>["xxx.xxx.xxx.xxx", "xxx.xxx.xxx.xxx", "xxx.xxx.xxx.xxx"], :level=>:info} > The error reported is: > comparison of String with 1 failed > > ``` ---
**Author:** ![met3or](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/met3or/32/17232_2.png) [@met3or](https://discuss.elastic.co/u/met3or)\ **Post date:** [February 16, 2016, 2:42pm UTC](https://discuss.elastic.co/t/logstash-upgrade-error/41528/5 "2016-02-16T14:42:26Z")
Hello, Having investigated this further, the resolution of the issue was that it appears version 2.2 appears to be enforcing types of data more accurately: So whilst the line : > workers =\> "30" Had worked in 2.1, in 2.2 this had been causing the failure and was in fact meant to be declared as an integer: > workers =\> 30 Thanks for taking a look, this can be considered closed. Regards, David ---
**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, 5:11am UTC](https://discuss.elastic.co/t/logstash-upgrade-error/41528/6 "2017-07-06T05:11:10Z")
Closed on July 6, 2017, 5:11am UTC