使用canal 有报错

报错信息：

2016-03-25 17:56:48.605 [destination = mysql_56688 , address = /127.0.0.1:56688 , EventParser] WARN c.a.otter.canal.parse.inbound.mysql.MysqlEventParser - prepare to find start position /data/mysql_data/data/mysql-bin.000001:4: 2016-03-25 17:56:48.607 [destination = mysql_56688 , address = /127.0.0.1:56688 , EventParser] ERROR c.a.o.canal.parse.inbound.mysql.dbsync.DirectLogFetcher - I/O error while reading from client socket java.io.IOException: Received error packet: errno = 1236, sqlstate = HY000 errmsg = Could not find first log file name in binary log index file at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.DirectLogFetcher.fetch(DirectLogFetcher.java:95) ~[canal.parse-1.0.21.jar:na] at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.dump(MysqlConnection.java:113) [canal.parse-1.0.21.jar:na] at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$3.run(AbstractEventParser.java:209) [canal.parse-1.0.21.jar:na] at java.lang.Thread.run(Thread.java:745) [na:1.7.0_79] 2016-03-25 17:56:48.607 [destination = mysql_56688 , address = /127.0.0.1:56688 , EventParser] ERROR c.a.otter.canal.parse.inbound.mysql.MysqlEventParser - dump address /127.0.0.1:56688 has an error, retrying. caused by java.io.IOException: Received error packet: errno = 1236, sqlstate = HY000 errmsg = Could not find first log file name in binary log index file at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.DirectLogFetcher.fetch(DirectLogFetcher.java:95) ~[canal.parse-1.0.21.jar:na] at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.dump(MysqlConnection.java:113) ~[canal.parse-1.0.21.jar:na] at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$3.run(AbstractEventParser.java:209) ~[canal.parse-1.0.21.jar:na] at java.lang.Thread.run(Thread.java:745) [na:1.7.0_79] 2016-03-25 17:56:48.607 [destination = mysql_56688 , address = /127.0.0.1:56688 , EventParser] ERROR com.alibaba.otter.canal.common.alarm.LogAlarmHandler - destination:mysql_56688[java.io.IOException: Received error packet: errno = 1236, sqlstate = HY000 errmsg = Could not find first log file name in binary log index file at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.DirectLogFetcher.fetch(DirectLogFetcher.java:95) at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.dump(MysqlConnection.java:113) at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$3.run(AbstractEventParser.java:209) at java.lang.Thread.run(Thread.java:745)

MySQL:

5.6.25 canal: 1.0.21 instance.properties: canal.instance.mysql.slaveId = 3 canal.instance.master.address = 127.0.0.1:56688 canal.instance.master.journal.name = /data/mysql_data/data/mysql-bin.000001 canal.instance.master.position = 4

首先MySQL配置和文件权限都检查过了，没啥问题，这个是因为bin log目录不在常规目录引起的吗？

原提问者GitHub用户totmann