elasticsearch/logstash — pull request #1991 by tedder (2014-10-30 20:32:56+00:00)
Title: update documentation; sincedb_path = path+filename

fixes the following:

:message=>"A plugin had an unrecoverable error. Will restart this plugin.
Plugin: \"/opt/mypath\", region_endpoint=>\"us-east-1\">
Error: Is a directory - /opt/mypath", :level=>:error