RaigorJiang opened a new issue, #29459:
URL: https://github.com/apache/shardingsphere/issues/29459
## Bug Report
### Which version of ShardingSphere did you use?
master f8f90126f698cefe1ba83f5fbe953455f1971559
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy
### Expected behavior
When readwrite-splitting and shadow rule are used together, Proxy can be
started successfully.
### Actual behavior
Throws DataSourceNameExistedException
### Reason analyze (If you can)
1. When `checkWriteDataSourceNames`,
`ReadwriteSplittingRuleConfigurationChecker` will check other logic data sources
```java
ShardingSpherePreconditions.checkState(dataSourceMap.containsKey(each) ||
containsInOtherRules(each, rules),
() -> new
DataSourceNameExistedException(String.format("Write data source name `%s` not
in database `%s`.", each, databaseName)));
```
2. But when `checkReadeDataSourceNames`,
`ReadwriteSplittingRuleConfigurationChecker` will not check other logic data
sources, this may result in dependent data sources not being found.
```java
ShardingSpherePreconditions.checkState(dataSourceMap.containsKey(each),
() -> new
DataSourceNameExistedException(String.format("Read data source name `%s` not in
database `%s`.", each, databaseName)));
```
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