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java.lang.NullPointerException: 	at com.alibaba.otter.node.etl.select.selector.MessageParser.internParse(MessageParser.java:378)	at com.alibaba.otter.node.etl.select.selector.MessageParser.parse(MessageParser.java:181)	at com.alibaba.otter.node.etl.select.selector.canal.CanalEmbedSelector.selector(CanalEmbedSelector.java:264)	at com.alibaba.otter.node.etl.select.SelectTask.processSelect(SelectTask.java:236)	at com.alibaba.otter.node.etl.select.SelectTask.access$300(SelectTask.java:94)	at com.alibaba.otter.node.etl.select.SelectTask$1.run(SelectTask.java:208)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)	at java.util.concurrent.FutureTask.run(FutureTask.java:262)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:744)