Elasticsearch: Exception while starting ES, failed to delete one of translog file

Hi, When I am starting ES from command prompt on windows,
it is starting but with some exceptions.
Here I am posting what exceptions ES is asking for,

[2016-03-30 08:59:05,828][WARN ][index.translog           ] [Melody Guthrie] [packetbeat-2016.03.29][0] failed to delete temp file D:\elasticsearch-2.1.0\data\elasticsearch\nodes\0\indices\packetbeat-2016.03.29\0\translog\translog-5052304744414579251.tlog
java.nio.file.NoSuchFileException: D:\elasticsearch-2.1.0\data\elasticsearch\nodes\0\indices\packetbeat-2016.03.29\0\translog\translog-5052304744414579251.tlog
	at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:79)

This is also causing kibana uninitialized with message, "Plugin ES is still initializing index .kibana"

**What are these translog files are? **
I've tried to access the file physically through file system on the above path, the file is not
even exist. then, Why it is trying to delete the files?

{"type":"log","@timestamp":"2016-03-30T04:50:23+00:00","tags":["status","plugin:kibana","info"],"pid":7116,"name":"plugin:kibana","state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2016-03-30T04:50:23+00:00","tags":["status","plugin:elasticsearch","info"],"pid":7116,"name":"plugin:elasticsearch","state":"yellow","message":"Status changed from uninitialized to yellow - Waiting for Elasticsearch","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2016-03-30T04:50:24+00:00","tags":["status","plugin:kbn_vislib_vis_types","info"],"pid":7116,"name":"plugin:kbn_vislib_vis_types","state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2016-03-30T04:50:24+00:00","tags":["status","plugin:markdown_vis","info"],"pid":7116,"name":"plugin:markdown_vis","state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2016-03-30T04:50:24+00:00","tags":["status","plugin:metric_vis","info"],"pid":7116,"name":"plugin:metric_vis","state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2016-03-30T04:50:24+00:00","tags":["status","plugin:spyModes","info"],"pid":7116,"name":"plugin:spyModes","state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2016-03-30T04:50:24+00:00","tags":["status","plugin:statusPage","info"],"pid":7116,"name":"plugin:statusPage","state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2016-03-30T04:50:24+00:00","tags":["status","plugin:table_vis","info"],"pid":7116,"name":"plugin:table_vis","state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2016-03-30T04:50:24+00:00","tags":["listening","info"],"pid":7116,"message":"Server running at http://0.0.0.0:5601"}
{"type":"log","@timestamp":"2016-03-30T04:50:24+00:00","tags":["status","plugin:elasticsearch","error"],"pid":7116,"name":"plugin:elasticsearch","state":"red","message":"Status changed from yellow to red - Elasticsearch is still initializing the kibana index... Trying again in 2.5 second.","prevState":"yellow","prevMsg":"Waiting for Elasticsearch"}

Which version?

ES: 2.1.0
Kibana: 4.3

Upgrade to 2.1.1: https://github.com/elastic/elasticsearch/pull/14872