Why MySQL server shutdown itself -


i have whm server, in server have many web sites made python, php, use mysql sometime mysql server shutdown itself, couldn't understand problem it, attached error server send me. way can solve problem, how can find error.

error log

when @ error log last error before mysql server shutdown this;

2015-07-06 07:21:06 22441 [warning] ip address '118.193.181.51' not resolved: name or service not known


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