9200 is restful api， 9300 is java api
now，I don't know which one to choose.
9200 can do more than 9300
for example，9200 can use "_cat/indices"，but 9300 can not
but my project is use java，
i use both 9200 port and 9300 port in my project ？
If you are just starting out, I would recommend you use the Java REST client which uses HTTP over port 9200 as the Java Transport client is being deprecated.
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