otter同步channel挂起，日志有异常，版本：otter4.2.18，aria2-1.17.1

pid:1 nid:3 exception:setl:com.google.common.collect.ComputationException: java.lang.NullPointerException at com.google.common.collect.MapMaker$ComputingMapAdapter.get(MapMaker.java:889) at com.alibaba.otter.canal.server.embedded.CanalServerWithEmbedded.start(CanalServerWithEmbedded.java:137) at com.alibaba.otter.node.etl.select.selector.canal.CanalEmbedSelector.start(CanalEmbedSelector.java:212) at com.alibaba.otter.node.etl.select.SelectTask.startup(SelectTask.java:170) at com.alibaba.otter.node.etl.select.SelectTask.run(SelectTask.java:126) Caused by: java.lang.NullPointerException at com.alibaba.otter.canal.instance.manager.CanalInstanceWithManager.doInitEventParser(CanalInstanceWithManager.java:337) at com.alibaba.otter.canal.instance.manager.CanalInstanceWithManager.initEventParser(CanalInstanceWithManager.java:261) at com.alibaba.otter.canal.instance.manager.CanalInstanceWithManager.(CanalInstanceWithManager.java:93) at com.alibaba.otter.node.etl.select.selector.canal.CanalEmbedSelector$1$1.(CanalEmbedSelector.java:145) at com.alibaba.otter.node.etl.select.selector.canal.CanalEmbedSelector$1.generate(CanalEmbedSelector.java:145) at com.alibaba.otter.canal.server.embedded.CanalServerWithEmbedded$1.apply(CanalServerWithEmbedded.java:85) at com.alibaba.otter.canal.server.embedded.CanalServerWithEmbedded$1.apply(CanalServerWithEmbedded.java:82) at com.google.common.collect.ComputingConcurrentHashMap$ComputingValueReference.compute(ComputingConcurrentHashMap.java:356) at com.google.common.collect.ComputingConcurrentHashMap$ComputingSegment.compute(ComputingConcurrentHashMap.java:182) at com.google.common.collect.ComputingConcurrentHashMap$ComputingSegment.getOrCompute(ComputingConcurrentHashMap.java:151) at com.google.common.collect.ComputingConcurrentHashMap.getOrCompute(ComputingConcurrentHashMap.java:67) at com.google.common.collect.MapMaker$ComputingMapAdapter.get(MapMaker.java:885) ... 4 more