[Backport to 6.x] Backports of fixes from newer branches

Fixed unnecessary sleep after exhausted retries logstash-plugins#166
Changed Kafka send errors to log as warn logstash-plugins#179

Author: robbavey

.travis.yml

@@ -3,14 +3,10 @@ sudo: false
 language: ruby
 cache: bundler
 env: 
-rvm:
-- jruby-1.7.25
 matrix:
   include:
-  - rvm: jruby-9.1.10.0
-    env: LOGSTASH_BRANCH=master
   - rvm: jruby-1.7.25
-    env: LOGSTASH_BRANCH=5.x
+    env: LOGSTASH_BRANCH=5.6
   fast_finish: true
 install: true
 script: ci/build.sh

CHANGELOG.md

@@ -1,6 +1,8 @@
 ## 6.2.4
-  - Improve error logging when a producer cannot be created.
- 
+  - Backport of fixes from more recent branches:
+    - Fixed unnecessary sleep after exhausted retries [#166](https://github.com/logstash-plugins/logstash-output-kafka/pull/166)
+    - Changed Kafka send errors to log as warn [#179](https://github.com/logstash-plugins/logstash-output-kafka/pull/179)
+
 ## 6.2.3
   - Bugfix: Sends are now retried until successful. Previously, failed transmissions to Kafka
     could have been lost by the KafkaProducer library. Now we verify transmission explicitly.

logstash-output-kafka.gemspec

@@ -3,7 +3,7 @@ Gem::Specification.new do |s|
   s.name            = 'logstash-output-kafka'
   s.version         = '6.2.4'
   s.licenses        = ['Apache License (2.0)']
-  s.summary         = "Writes events to a Kafka topic"
+  s.summary         = 'Output events to a Kafka topic. This uses the Kafka Producer API to write messages to a topic on the broker'
   s.description     = "This gem is a Logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/logstash-plugin install gemname. This gem is not a stand-alone program"
   s.authors         = ['Elasticsearch']
   s.email           = '[email protected]'