Install ElasticSearch 1.5.2 + Basic Auth on Centos 6.x Server

install-elastic-1.5.2-basic-auth

sudo su
yum update -y

#*************** INSTALL JAVA JDK 8*********************#
yum install java-1.8.0-openjdk -y

#*************** INSTALL ELASTICSEARCH 1.5.2 + RECOMMENDED PLUGINS *********************#
wget https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-1.5.2.noarch.rpm
yum install elasticsearch-1.5.2.noarch.rpm -y
rm -f elasticsearch-1.5.2.noarch.rpm
cd /usr/share/elasticsearch/
./bin/plugin -install mobz/elasticsearch-head
./bin/plugin -install lukas-vlcek/bigdesk
./bin/plugin install elasticsearch/elasticsearch-analysis-kuromoji/2.5.0
./bin/plugin -install royrusso/elasticsearch-HQ

./bin/plugin --url https://dl.dropboxusercontent.com/u/1598491/elasticsearch-analysis-vietnamese-0.1.5.zip --install analysis-vietnamese



cd /usr/share/elasticsearch/plugins
mkdir http-basic
cd http-basic
wget https://github.com/Asquera/elasticsearch-http-basic/releases/download/v1.5.0/elasticsearch-http-basic-1.5.0.jar

cd /etc/elasticsearch
nano elasticsearch.yml

#************************************#
cluster.name: mtom
http.cors.enabled: true
http.cors.allow-origin: "*"
http.basic.enabled: true
http.basic.user: YOUR_USER_NAME
http.basic.password: YOUR_PASSWORD
#************************************#

service elasticsearch start
chkconfig elasticsearch on

Same issue here. I fixed this by putting PID_DIR="/var/run" into /etc/default/elasticsearch.
In my opinion, on Ubuntu/Debian all pid files are directly in this folder, so PID_DIR by default should just be /var/run