severous opened a new issue, #32183:
URL: https://github.com/apache/shardingsphere/issues/32183
I am getting the error shown below when using a custom data source:
```bash
Caused by: java.lang.NullPointerException: Cannot invoke "Object.toString()"
because the return value of "java.util.Map.get(Object)" is null
at
org.apache.shardingsphere.infra.metadata.database.resource.unit.StorageUnit.<init>(StorageUnit.java:56)
at
org.apache.shardingsphere.infra.config.database.impl.DataSourceProvidedDatabaseConfiguration.getStorageUnits(DataSourceProvidedDatabaseConfiguration.java:73)
at
org.apache.shardingsphere.infra.config.database.impl.DataSourceProvidedDatabaseConfiguration.<init>(DataSourceProvidedDatabaseConfiguration.java:54)
at
org.apache.shardingsphere.driver.jdbc.core.datasource.ShardingSphereDataSource.createContextManager(ShardingSphereDataSource.java:77)
at
org.apache.shardingsphere.driver.jdbc.core.datasource.ShardingSphereDataSource.<init>(ShardingSphereDataSource.java:67)
at
org.apache.shardingsphere.driver.api.ShardingSphereDataSourceFactory.createDataSource(ShardingSphereDataSourceFactory.java:95)
at
org.apache.shardingsphere.driver.api.ShardingSphereDataSourceFactory.createDataSource(ShardingSphereDataSourceFactory.java:78)
at
org.apache.shardingsphere.driver.api.ShardingSphereDataSourceFactory.createDataSource(ShardingSphereDataSourceFactory.java:139)
```
<img width="1277" alt="截屏2024-07-18 21 41 27"
src="https://github.com/user-attachments/assets/87ff2152-b85b-4cf9-ae7c-ae9bb02ec428";>
The error occurs in the following line of code because of standardProps is
null
```java
Map<String, Object> standardProps =
dataSourcePoolProperties.getConnectionPropertySynonyms().getStandardProperties();
String url = standardProps.get("url").toString();
```
These properties are obtained from the DataSourcePoolReflection, which
obtains them in a reflective manner. However, my custom datasource does not
have these getter methods! I would like to know what conditions must be
fulfilled for a custom data source
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