我暴力的删除的了zk中的znode，重启canal的时候他会重新加载instance和canal s

环境：Ubuntu 16.04 jdk：1.8 canal环境：一个canal server，两个instance， canal版本：canal.kafka-1.1.0

出现问题原因：

1、删除zk上/otter znode 目的：重置instance的binlog file和Position

详细日志： 2018-10-23 16:05:48.880 [pool-6-thread-2] ERROR com.alibaba.otter.canal.kafka.producer.CanalKafkaStarter - process error! java.lang.NullPointerException: null at com.alibaba.otter.canal.store.memory.MemoryEventStoreWithBuffer.calculateSize(MemoryEventStoreWithBuffer.java:555) ~[canal.store-1.1.0.jar:na] at com.alibaba.otter.canal.store.memory.MemoryEventStoreWithBuffer.doGet(MemoryEventStoreWithBuffer.java:322) ~[canal.store-1.1.0.jar:na] at com.alibaba.otter.canal.store.memory.MemoryEventStoreWithBuffer.tryGet(MemoryEventStoreWithBuffer.java:261) ~[canal.store-1.1.0.jar:na] at com.alibaba.otter.canal.server.embedded.CanalServerWithEmbedded.getEvents(CanalServerWithEmbedded.java:478) ~[canal.server-1.1.0.jar:na] at com.alibaba.otter.canal.server.embedded.CanalServerWithEmbedded.getWithoutAck(CanalServerWithEmbedded.java:310) ~[canal.server-1.1.0.jar:na] at com.alibaba.otter.canal.server.embedded.CanalServerWithEmbedded.getWithoutAck(CanalServerWithEmbedded.java:273) ~[canal.server-1.1.0.jar:na] at com.alibaba.otter.canal.kafka.producer.CanalKafkaStarter.worker(CanalKafkaStarter.java:121) [canal.kafka-1.1.0.jar:na] at com.alibaba.otter.canal.kafka.producer.CanalKafkaStarter.access$000(CanalKafkaStarter.java:26) [canal.kafka-1.1.0.jar:na] at com.alibaba.otter.canal.kafka.producer.CanalKafkaStarter$1.run(CanalKafkaStarter.java:70) [canal.kafka-1.1.0.jar:na] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_181] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181] 2018-10-23 16:05:48.881 [pool-6-thread-2] INFO com.alibaba.otter.canal.kafka.producer.CanalKafkaStarter - ## the canal consumer user_cards is running now ...... 2018-10-23 16:05:48.881 [pool-6-thread-2] ERROR com.alibaba.otter.canal.kafka.producer.CanalKafkaStarter - process error! java.lang.NullPointerException: null at com.alibaba.otter.canal.store.memory.MemoryEventStoreWithBuffer.calculateSize(MemoryEventStoreWithBuffer.java:555) ~[canal.store-1.1.0.jar:na] at com.alibaba.otter.canal.store.memory.MemoryEventStoreWithBuffer.doGet(MemoryEventStoreWithBuffer.java:322) ~[canal.store-1.1.0.jar:na] at com.alibaba.otter.canal.store.memory.MemoryEventStoreWithBuffer.tryGet(MemoryEventStoreWithBuffer.java:261) ~[canal.store-1.1.0.jar:na] at com.alibaba.otter.canal.server.embedded.CanalServerWithEmbedded.getEvents(CanalServerWithEmbedded.java:478) ~[canal.server-1.1.0.jar:na] at com.alibaba.otter.canal.server.embedded.CanalServerWithEmbedded.getWithoutAck(CanalServerWithEmbedded.java:310) ~[canal.server-1.1.0.jar:na] at com.alibaba.otter.canal.server.embedded.CanalServerWithEmbedded.getWithoutAck(CanalServerWithEmbedded.java:273) ~[canal.server-1.1.0.jar:na] at com.alibaba.otter.canal.kafka.producer.CanalKafkaStarter.worker(CanalKafkaStarter.java:121) [canal.kafka-1.1.0.jar:na] at com.alibaba.otter.canal.kafka.producer.CanalKafkaStarter.access$000(CanalKafkaStarter.java:26) [canal.kafka-1.1.0.jar:na] at com.alibaba.otter.canal.kafka.producer.CanalKafkaStarter$1.run(CanalKafkaStarter.java:70) [canal.kafka-1.1.0.jar:na] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_181] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]

我暴力的删除的了zk中的znode，重启canal的时候他会重新加载instance和canal server的配置么？

原提问者GitHub用户1241407808