logstash json_lines issue

example.log.parsed.snippet

{"message":"proxy-435.dialup.xtra.co.nz - - [22/Apr/2009:18:52:51 +1200] \"GET /images/photos/455.jpg HTTP/1.1\" 200 986 \"-\" \"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_4_11; en) AppleWebKit/525.13 (KHTML, like Gecko) Version/3.1 Safari/525.13\" \"-\"","@version":"1","@timestamp":"2015-04-16T17:35:24.585Z","host":"rgheorghe-suse.rgheorghe-local","path":"/opt/example.log.raw","clientip":"proxy-435.dialup.xtra.co.nz","ident":"-","auth":"-","timestamp":"22/Apr/2009:18:52:51 +1200","verb":"GET","request":"/images/photos/455.jpg","httpversion":"1.1","response":"200","bytes":"986","referrer":"\"-\"","agent":"\"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_4_11; en) AppleWebKit/525.13 (KHTML, like Gecko) Version/3.1 Safari/525.13\""}
{"message":"proxy-435.dialup.xtra.co.nz - - [22/Apr/2009:18:52:51 +1200] \"GET /images/nav/tab_left_middle.gif HTTP/1.1\" 200 1020 \"-\" \"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_4_11; en) AppleWebKit/525.13 (KHTML, like Gecko) Version/3.1 Safari/525.13\" \"-\"","@version":"1","@timestamp":"2015-04-16T17:35:24.591Z","host":"rgheorghe-suse.rgheorghe-local","path":"/opt/example.log.raw","clientip":"proxy-435.dialup.xtra.co.nz","ident":"-","auth":"-","timestamp":"22/Apr/2009:18:52:51 +1200","verb":"GET","request":"/images/nav/tab_left_middle.gif","httpversion":"1.1","response":"200","bytes":"1020","referrer":"\"-\"","agent":"\"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_4_11; en) AppleWebKit/525.13 (KHTML, like Gecko) Version/3.1 Safari/525.13\""}

logstash.conf

input {
  file {
    path => "/opt/logs/example.log.parsed"
    start_position => "beginning"
    codec => "json_lines"
  }
}

output {
  elasticsearch {
    workers => 4
  }
}