strongduanmu opened a new issue #13556: URL: https://github.com/apache/shardingsphere/issues/13556
## Bug Report ### Which version of ShardingSphere did you use? master branch After PR#13531 was merged, shadow provided the configuration of the logical data source name, which caused problems in the processing logic of the dataNode, and finally resulted in NPE when loading metadata. ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy? ShardingSphere-JDBC ### Expected behavior Execute shadow example successfully ### Actual behavior NPE occurs ### Reason analyze (If you can) ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc. shadow-spring-boot-mybatis-example——application.properties ```properties #spring.profiles.active=shadow #spring.profiles.active=shadow-default-algorithm spring.profiles.active=shadow-readwrite-splitting #spring.profiles.active=shadow-sharding-databases #spring.profiles.active=shadow-encrypt spring.shardingsphere.props.sql-show=true spring.shardingsphere.props.sql-comment-parse-enabled=true mybatis.config-location=classpath:META-INF/mybatis-config.xml ``` shadow-spring-boot-mybatis-example——application-shadow-readwrite-splitting.properties ```properties spring.shardingsphere.datasource.names=write-ds,read-ds,shadow-write-ds,shadow-read-ds spring.shardingsphere.datasource.write-ds.jdbc-url=jdbc:mysql://localhost:3306/demo_write_ds?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=UTF-8 spring.shardingsphere.datasource.write-ds.type=com.zaxxer.hikari.HikariDataSource spring.shardingsphere.datasource.write-ds.driver-class-name=com.mysql.jdbc.Driver spring.shardingsphere.datasource.write-ds.username=root spring.shardingsphere.datasource.write-ds.password=123456 spring.shardingsphere.datasource.shadow-write-ds.jdbc-url=jdbc:mysql://localhost:3306/demo_shadow_write_ds?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=UTF-8 spring.shardingsphere.datasource.shadow-write-ds.type=com.zaxxer.hikari.HikariDataSource spring.shardingsphere.datasource.shadow-write-ds.driver-class-name=com.mysql.jdbc.Driver spring.shardingsphere.datasource.shadow-write-ds.username=root spring.shardingsphere.datasource.shadow-write-ds.password=123456 spring.shardingsphere.datasource.read-ds.jdbc-url=jdbc:mysql://localhost:3306/demo_write_ds?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=UTF-8 spring.shardingsphere.datasource.read-ds.type=com.zaxxer.hikari.HikariDataSource spring.shardingsphere.datasource.read-ds.driver-class-name=com.mysql.jdbc.Driver spring.shardingsphere.datasource.read-ds.username=root spring.shardingsphere.datasource.read-ds.password=123456 spring.shardingsphere.datasource.shadow-read-ds.jdbc-url=jdbc:mysql://localhost:3306/demo_shadow_write_ds?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=UTF-8 spring.shardingsphere.datasource.shadow-read-ds.type=com.zaxxer.hikari.HikariDataSource spring.shardingsphere.datasource.shadow-read-ds.driver-class-name=com.mysql.jdbc.Driver spring.shardingsphere.datasource.shadow-read-ds.username=root spring.shardingsphere.datasource.shadow-read-ds.password=123456 spring.shardingsphere.rules.readwrite-splitting.load-balancers.round_robin.type=ROUND_ROBIN spring.shardingsphere.rules.readwrite-splitting.data-sources.pr_ds.write-data-source-name=shadow-data-source-write spring.shardingsphere.rules.readwrite-splitting.data-sources.pr_ds.read-data-source-names=shadow-data-source-read spring.shardingsphere.rules.readwrite-splitting.data-sources.pr_ds.load-balancer-name=round_robin spring.shardingsphere.rules.shadow.enable=true spring.shardingsphere.rules.shadow.data-sources.shadow-data-source-write.source-data-source-name=write-ds spring.shardingsphere.rules.shadow.data-sources.shadow-data-source-write.shadow-data-source-name=shadow-write-ds spring.shardingsphere.rules.shadow.data-sources.shadow-data-source-read.source-data-source-name=read-ds spring.shardingsphere.rules.shadow.data-sources.shadow-data-source-read.shadow-data-source-name=shadow-read-ds spring.shardingsphere.rules.shadow.tables.t_user.data-source-names=shadow-data-source-write,shadow-data-source-read spring.shardingsphere.rules.shadow.tables.t_user.shadow-algorithm-names=user-id-insert-match-algorithm,user-id-delete-match-algorithm,user-id-select-match-algorithm,simple-hint-algorithm spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-insert-match-algorithm.type=REGEX_MATCH spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-insert-match-algorithm.props.operation=insert spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-insert-match-algorithm.props.column=user_type spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-insert-match-algorithm.props.regex=[1] spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-delete-match-algorithm.type=REGEX_MATCH spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-delete-match-algorithm.props.operation=delete spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-delete-match-algorithm.props.column=user_type spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-delete-match-algorithm.props.regex=[1] spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-select-match-algorithm.type=REGEX_MATCH spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-select-match-algorithm.props.operation=select spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-select-match-algorithm.props.column=user_type spring.shardingsphere.rules.shadow.shadow-algorithms.user-id-select-match-algorithm.props.regex=[1] spring.shardingsphere.rules.shadow.shadow-algorithms.simple-hint-algorithm.type=SIMPLE_HINT spring.shardingsphere.rules.shadow.shadow-algorithms.simple-hint-algorithm.props.shadow=true spring.shardingsphere.rules.shadow.shadow-algorithms.simple-hint-algorithm.props.foo=bar ``` And then run ShadowSpringBootMybatisExample. ### Example codes for reproduce this issue (such as a 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