handle generic (unwrapped) errors from Redis

[kares]

such as: IOError, otherwise these willl propagate out and crash the pipeline:

[ERROR][logstash.javapipeline    ][mq][f669cc10d01329b13e936073a827724110f2c178c852cebfd2d8d3f80a58141c] A plugin had an unrecoverable error. Will restart this plugin.
  Pipeline_id:loggermq
  Plugin: <LogStash::Inputs::Redis host=>"some.host", data_type=>"list", id=>"redis", key=>"foo", enable_metric=>true, codec=><LogStash::Codecs::JSON id=>"json_6227b920-d3b8-4380-a469-ee7d9949a208", enable_metric=>true, charset=>"UTF-8">, threads=>1, port=>6379, ssl=>false, db=>0, timeout=>5, batch_count=>125>
  Error: closed stream
  Exception: IOError
  Stack: org/jruby/RubyIO.java:1366:in `write_nonblock'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:76:in `block in write'
org/jruby/RubyKernel.java:1442:in `loop'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:75:in `write'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:374:in `write'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:289:in `block in write'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:268:in `io'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:287:in `write'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:245:in `block in process'
org/jruby/RubyArray.java:1809:in `each'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:239:in `block in process'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:389:in `ensure_connected'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:238:in `block in process'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:344:in `logging'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:237:in `process'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis/client.rb:131:in `call'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis.rb:2585:in `block in _eval'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis.rb:69:in `block in synchronize'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/monitor.rb:235:in `mon_synchronize'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis.rb:69:in `synchronize'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis.rb:2584:in `_eval'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/redis-4.2.5/lib/redis.rb:2636:in `evalsha'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-input-redis-3.5.1/lib/logstash/inputs/redis.rb:222:in `list_batch_listener'
org/jruby/RubyMethod.java:123:in `call'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-input-redis-3.5.1/lib/logstash/inputs/redis.rb:208:in `list_runner'
org/jruby/RubyMethod.java:119:in `call'
/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-input-redis-3.5.1/lib/logstash/inputs/redis.rb:104:in `run'
:1:in `'
/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:396:in `block in start_input'