每天遇到一次 should execute connector.connect() first 异常

otter每天遇到一次下面的异常，看堆栈是连接中断，需要重联。 但是遇到这种错误，有时同步迅速就恢复了，有时同步会中断10分钟左右。是什么原因，如何解决？

pid:4 nid:3 exception:canal:hd_canal_236:com.alibaba.otter.canal.parse.exception.CanalParseException: com.alibaba.otter.canal.parse.exception.CanalParseException: parse row data failed. Caused by: com.alibaba.otter.canal.parse.exception.CanalParseException: parse row data failed. Caused by: com.alibaba.otter.canal.parse.exception.CanalParseException: com.google.common.util.concurrent.UncheckedExecutionException: java.io.IOException: should execute connector.connect() first Caused by: com.google.common.util.concurrent.UncheckedExecutionException: java.io.IOException: should execute connector.connect() first at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4832) at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.TableMetaCache.getTableMeta(TableMetaCache.java:160) at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.LogEventConvert.getTableMeta(LogEventConvert.java:759) at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.LogEventConvert.parseRowsEvent(LogEventConvert.java:428) at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.LogEventConvert.parse(LogEventConvert.java:114) at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.LogEventConvert.parse(LogEventConvert.java:66) at com.alibaba.otter.canal.parse.inbound.AbstractEventParser.parseAndProfilingIfNecessary(AbstractEventParser.java:337) at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$3$1.sink(AbstractEventParser.java:184) at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.dump(MysqlConnection.java:145) at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$3.run(AbstractEventParser.java:220) at java.lang.Thread.run(Thread.java:724) Caused by: java.io.IOException: should execute connector.connect() first at com.alibaba.otter.canal.parse.driver.mysql.MysqlQueryExecutor.(MysqlQueryExecutor.java:30) at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.query(MysqlConnection.java:87) at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.TableMetaCache.getTableMetaByDB(TableMetaCache.java:80) at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.TableMetaCache.access$000(TableMetaCache.java:30) at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.TableMetaCache$1.load(TableMetaCache.java:55) at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.TableMetaCache$1.load(TableMetaCache.java:50) at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527) at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319) at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282) at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197) at com.google.common.cache.LocalCache.get(LocalCache.java:3937) at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3941) at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824) at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4830)

原提问者GitHub用户chenchenwenfeng