Unable to read log file on windows using file input

On windows instance I have setup logstash 1.5 to read apache log files using the file input plugin, when I start the logstash instance it goes and globs all the files and throws this error

{:timestamp=>"2015-06-05T19:03:17.048000-0400", :message=>"(warn supressed) failed to open D://Apache/logs/access.log.1433289600: cannot link Java class RubyFileExt", :level=>:debug, :file=>"/Software/logstash-1.5.0/vendor/bundle/jruby/1.9/gems/filewatch-0.6.2/lib/filewatch/tail.rb", :line=>"134", :method=>"_open_file"}

{:timestamp=>"2015-06-05T19:03:17.048000-0400", :message=>"(warn supressed) failed to open D:/Apache/logs/access.log.1433462400: cannot link Java class RubyFileExt", :level=>:debug, :file=>"/Software/logstash-1.5.0/vendor/bundle/jruby/1.9/gems/filewatch-0.6.2/lib/filewatch/tail.rb", :line=>"134", :method=>"_open_file"}

Here's my file input config,

file {
type => "apache_access"
path => "D:/Apache/logs/access."
exclude => ["
.gz", ".zip", ".tar", "httpd.pid", "deflate.log", "error.*"]
start_position => end
sincedb_path => "E:/Software/logstash-1.5.0/bin/sincedb_access"
stat_interval => 5
sincedb_write_interval => 5
}
}

is this because the file is locked? or something else is wrong ?

Suresh