模型同步數據量過大導致程序不繼續執行，原因：janusgraph的異常

模型同步，不報異常，查詢數據量過大，janusgraph有如下日誌：

7701794 [gremlin-server-exec-30] WARN  org.apache.tinkerpop.gremlin.server.op.AbstractEvalOpProcessor  - Pausing response writing as writeBufferHighWaterMark exceeded on RequestMessage{, requestId=2217b79d-1368-4e89-9ab1-a904699ed18f, op='eval', processor='', args={gremlin=try {return g.V().has(param6, within(param7,param8,param9,param10,param11,param12,param13,param14,param15,param16,param17,param18,param19,param20,param21,param22,param23,param24,param25,param26,param27,param28,param29,param30,param31,param32,param33,param34)).in(param35).as('a').repeat(__.in(param36,param37,param38)).until(has(param6,param39).or().loops().is(15)).emit().where(has(param6,within(param40))).select('a').dedup().valueMap();; graph.tx().commit()} catch(Exception e){g.tx().rollback(); throw e} , bindings={param18=/haier/5d5509c4c8bb7500080f627d, param19=/haier/5d677113d6449000085d9698, param14=/haier/5d64cec850cf500008747b09, param36=R-/0/35, param15=/haier/5d64