• The proposed system is the first RCA approach for cloud-native applications to combinea knowledge graph and a causality search algorithm.• We have implemented a prototype for generating a causality graph and sorting possible rootcauses.• We have proved experimentally that the proposed approach can rank the root causes in the toptwo with over 80% precision and recall for most scenarios.The rest of this paper is structured as follows: Related work is discussed in Section 2. The problemand the proposed solution are described in Section 3. An empirical study is demonstrated in Section 4,and Section 5 summarizes the conclusions and describes planned work.