Prevent elasticsearch from logging to /var/log/messages

I have elasticsearch setup with SugarCRM and it is logging a lot of stuff to /var/log/messages, making that file multiple GBs in just a few days. I have been searching all around and can't figure out how to prevent elasticsearch from logging to /var/log/messages. And most of what it's logging appears to just be gibberish. Here's an example:
Jul 18 12:32:04 svr elasticsearch: NC9BVjB1bjJFMXY4QURYU0xRU0xKOWx2SStTRG5BT0J4L3dBQ3pUL0VkaTBYeHY4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\nUHhFOEQvQUE3dG5lenZmRlhpT3owVmJS

What OS, what version of ES?

CentOS 7.2 and ES 2.3.3-1