yesterday we tried to update our production system.
we have N logstash instances (as shipper) to a few redis instances.
Then there are a few logstash indexer pulling from redis and putting them into the elasticsearch cluster.
with logstash 1.5.1 and elasticsearch 1.6.1 all was fines for weeks.
Now, with logstash 1.5.3 (JDK 7 and 8) we run into the problem that logstash is dying with notification like
"undefined method `close' for nil:NilClass".
Since i am no ruby expert, can anybody be of assistance what went wrong and how to fix this ?
Elasticsearch runs but does not receive events from logstash since logstash dies after nearly 30 sec.