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'com.alibaba.otter:canal.protocol:1.0.21'
<dependency>
<groupId>com.alibaba.otter</groupId>
<artifactId>canal.protocol</artifactId>
<version>1.0.21</version>
</dependency>
<dependency org="com.alibaba.otter" name="canal.protocol" rev="1.0.21"/>
"com.alibaba.otter", "canal.protocol", "1.0.21"