ovtomcat B service automatically stopped always NNm side always

Dear Team,

we have NNM standalone server and bsmc connector same server . some time facing issue OvtomcatB service automatically stopped from nnm server always. we have manually started again and again. NNmi to OMI alerts are not getting after stopped ovtomcatB. 

and we have daily OVC -kill and opcagt - clean start run cmd . after clean start working fine but some hours facing again problem.

please provide the solution for the same.