Failed to send event to Redis. IOError

Hi,
today I got an Error, that I can not fix. My Setup (everything is on one local machine, so I can easily test it):
Its a windows server with 16GB, 64-Bit
Logstash Version 2.2.0
Kibana Version 4.4.1
Elasticsearch Version 2.3.0
Redis Version 3.0.501

3 Shipper => Redis => Logstash Indexer => Elasticsearch => Kibana

I'll get this error even if my Setup is only (without Indexer,ES,Ki):

3 Shipper => Redis

So it's a problem from Logstash or Redis. I start the shipper with -b 2000 -w 8.

←[33mFailed to send event to Redis {:event=>#<LogStash::Event:0x3e031e0d
@accessors=#<LogStash::Util::Accessors:0xcc469c3
...
:exception=>#<IOError: Unable to establish loopback connection>,
:backtrace=>["org/jruby/RubyIO.java:3682:in select'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/connection/ruby.rb:52:in_read_from_socket'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/connection/ruby.rb:49:in _read_from_socket'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/connection/ruby.rb:41:ingets'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/connection/ruby.rb:273:in read'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:249:inread'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:237:in io'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:248:inread'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:113:in call'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:218:inprocess'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:354:in ensure_connected'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:208:inprocess'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:293:in logging'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:207:inprocess'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis/client.rb:113:in call'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis.rb:1030:inrpush'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis.rb:57:in synchronize'", "C:/Program Files/ELK/logstash-2.2.0/vendor/jruby/lib/ruby/1.9/monitor.rb:211:inmon_synchronize'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/jruby/lib/ruby/1.9/monitor.rb:210:in mon_synchronize'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis.rb:57:insynchronize'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/redis-3.2.2/lib/redis.rb:1029:in rpush'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-output-redis-2.0.2/lib/logstash/outputs/redis.rb:169:inreceive'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/outputs/base.rb:83:in multi_receive'", "org/jruby/RubyArray.java:1613:ineach'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/outputs/base.rb:83:in multi_receive'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/output_delegator.rb:119:inworker_multi_receive'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/output_delegator.rb:118:in worker_multi_receive'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/output_delegator.rb:65:inmulti_receive'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/pipeline.rb:275:in output_batch'", "org/jruby/RubyHash.java:1342:ineach'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/pipeline.rb:275:in output_batch'", "C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/pipeline.rb:206:inworker_loop'",
"C:/Program Files/ELK/logstash-2.2.0/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/pipeline.rb:175:in `start_workers'"]

input {
file {
type => "log4j"
path => "///logs////.log"
start_position => beginning
sincedb_path => null
codec => plain { charset => "ISO-8859-1" }
}
}
output {
redis {
host => ["
**.***.***.***:6379"]
data_type => "list"
key => "logstash"
codec => plain { charset => "ISO-8859-1" }
}
}

IOError: Unable to establish loopback connection

Did you check redis?

Redis works, i tried it with different Versions

I tried it with -w 2 to start my shipper. Everythings fine. Why I can't start the shipper with -w 8 or more?!