之前使用Flink1.13+Flink CDC2.0同步MySQL数据，想测试一下最新的几个版本。但是各种依赖冲突的报错，经过一段时间的调试，终于解决，现在总结一下。

1、flink1.15前后jar包名称不一样

flink-streaming-java、flink-clients、flink-table-api-java-bridge这几个在flink1.15之前，后缀区分Scala版本，如flink-streaming-java_2.12，flink 1.15及之后全部去掉Scala后缀，如flink-streaming-java。

详见：Maven Repository: org.apache.flink » flink-streaming-java (mvnrepository.com)https://mvnrepository.com/artifact/org.apache.flink/flink-streaming-java

2、blink-planner

flink 1.14 版本以后，之前版本 blink-planner 转正为 flink 唯一的 planner

所以：flink-table-planner-blink  替换成 flink-table-planner

flink-table-runtime-blink 替换成 flink-table-runtime

3、MySQL依赖

报错：Caused by: java.lang.NoSuchMethodError: com.mysql.cj.CharsetMapping.getJavaEncodingForMysqlCharset(Ljava/lang/String;)Ljava/lang/String;

如果MySQL是8.0，fink cdc2.1之后由debezium连接器引起的问题。

将依赖改为8.0.21之后

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.32</version>
        </dependency>

4、guava30依赖冲突

报错：NoClassDefFoundError: org/apache/flink/shaded/guava30/com/google/common/collect/Lists

flink 1.15 及之后和 1.13 使用的 flink-shaded-guava 版本不一样，两个版本不兼容，需要修改 cdc 中的 flink-shaded-guava 版本。

调整完之后就可以了

附录

flink 1.16 + flink-connector-mysql-cdc2.3 的依赖

<properties>
        <flink-version>1.16.0</flink-version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-java</artifactId>
            <version>${flink-version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-streaming-java</artifactId>
            <version>${flink-version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-clients</artifactId>
            <version>${flink-version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table-planner_2.12</artifactId>
            <version>${flink-version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table-runtime</artifactId>
            <version>${flink-version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table-api-java-bridge</artifactId>
            <version>${flink-version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-core</artifactId>
            <version>${flink-version}</version>
        </dependency>
        <dependency>
            <groupId>com.ververica</groupId>
            <artifactId>flink-connector-mysql-cdc</artifactId>
            <version>2.3.0</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.32</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-shaded-guava</artifactId>
            <version>30.1.1-jre-16.0</version>
        </dependency>
    </dependencies>