canal-server1.1.4遇到很大数据量的DML语句时，出现重复订阅

[VincentLiSH]

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

environment

• canal version 1.1.4
• mysql version 8
• zookeeper latest

Issue Description

我在数据库执行create table xxx_etl_init as select * from xxx 这样的dml语句，对xxx表存量数据做初始化etl，
对于数据量几千的表没什么问题，
但是当遇到数据量9万以上的表时，canal-server会出现以下日志——最初22:35的两条是正常的 客户端订阅轮训后产生的，但是接下来23:13:47以及之后不断出现的日志 则会导致重复订阅 ：

2020-05-25 22:35:55.005 [New I/O server worker #1-1] INFO c.a.otter.canal.instance.core.AbstractCanalInstance - subscribe filter change to qcdbv2..*
2020-05-25 22:35:55.006 [New I/O server worker #1-1] WARN c.a.o.canal.parse.inbound.mysql.dbsync.LogEventConvert - --> init table filter : ^qcdbv2..$
2020-05-25 23:13:47.771 [New I/O server worker #1-2] INFO c.a.otter.canal.instance.core.AbstractCanalInstance - subscribe filter change to qcdbv2..
2020-05-25 23:13:47.772 [New I/O server worker #1-2] WARN c.a.o.canal.parse.inbound.mysql.dbsync.LogEventConvert - --> init table filter : ^qcdbv2..$
2020-05-25 23:13:52.883 [New I/O server worker #1-3] INFO c.a.otter.canal.instance.core.AbstractCanalInstance - subscribe filter change to qcdbv2..
2020-05-25 23:13:52.883 [New I/O server worker #1-3] WARN c.a.o.canal.parse.inbound.mysql.dbsync.LogEventConvert - --> init table filter : ^qcdbv2..$
2020-05-25 23:41:35.519 [New I/O server worker #1-4] INFO c.a.otter.canal.instance.core.AbstractCanalInstance - subscribe filter change to qcdbv2..
2020-05-25 23:41:35.519 [New I/O server worker #1-4] WARN c.a.o.canal.parse.inbound.mysql.dbsync.LogEventConvert - --> init table filter : ^qcdbv2..*$

Steps to reproduce

canal.instance.memory.buffer.size =1024
canal.instance.memory.buffer.memunit = 1048576
canal.instance.memory.batch.mode = MEMSIZE

Expected behaviour

Actual behaviour

If there is an exception, please attach the exception trace:

Just put your stack trace here!

[agapple]

这个日志是你客户端在发生重新订阅，检查一下客户端是否有异常？