Elasticsearch 2.3 vs elasticsearch 1.7 Java Heap space
Try by increasing the JAVA_HEAP_SPACE. it worked for me
- Open Elasticsearch file from "/etc/sysconfig"
sudo vi /etc/sysconfig/elasticsearch
2.You can change the heap size here
ES_HEAP_SIZE=2g
(The default size is 2gb. You can increase it upto 50% of available ram)