zjcnb opened a new issue, #18478:
URL: https://github.com/apache/shardingsphere/issues/18478
## Bug Report
### Which version of ShardingSphere did you use?
`master`
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
`ShardingSphere-Proxy`
```
java.lang.NullPointerException: Can not get connection from datasource
read_ds_1.
at
com.google.common.base.Preconditions.checkNotNull(Preconditions.java:987)
at
org.apache.shardingsphere.proxy.backend.communication.jdbc.datasource.JDBCBackendDataSource.getConnections(JDBCBackendDataSource.java:77)
at
org.apache.shardingsphere.proxy.backend.communication.jdbc.datasource.JDBCBackendDataSource.getConnections(JDBCBackendDataSource.java:52)
at
org.apache.shardingsphere.proxy.backend.communication.jdbc.connection.JDBCBackendConnection.createNewConnections(JDBCBackendConnection.java:101)
at
org.apache.shardingsphere.proxy.backend.communication.jdbc.connection.JDBCBackendConnection.getConnections(JDBCBackendConnection.java:91)
at
org.apache.shardingsphere.infra.executor.sql.prepare.driver.DriverExecutionPrepareEngine.group(DriverExecutionPrepareEngine.java:82)
at
org.apache.shardingsphere.infra.executor.sql.prepare.AbstractExecutionPrepareEngine.prepare(AbstractExecutionPrepareEngine.java:62)
at
org.apache.shardingsphere.proxy.backend.communication.ProxySQLExecutor.useDriverToExecute(ProxySQLExecutor.java:165)
at
org.apache.shardingsphere.proxy.backend.communication.ProxySQLExecutor.execute(ProxySQLExecutor.java:132)
at
org.apache.shardingsphere.proxy.backend.communication.ProxySQLExecutor.execute(ProxySQLExecutor.java:126)
at
org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.execute(JDBCDatabaseCommunicationEngine.java:138)
at
org.apache.shardingsphere.proxy.backend.text.admin.mysql.executor.UnicastResourceShowExecutor.execute(UnicastResourceShowExecutor.java:84)
at
org.apache.shardingsphere.proxy.backend.text.admin.DatabaseAdminQueryBackendHandler.execute(DatabaseAdminQueryBackendHandler.java:56)
at
org.apache.shardingsphere.proxy.frontend.mysql.command.query.text.query.MySQLComQueryPacketExecutor.execute(MySQLComQueryPacketExecutor.java:95)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:108)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:78)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
```
### Configuration
```
databaseName: readwrite_splitting_db
dataSources:
write_ds:
url: jdbc:mysql://127.0.0.1:3306/ds0?serverTimezone=UTC&useSSL=false
username: root
password: 123456
connectionTimeoutMilliseconds: 30000
idleTimeoutMilliseconds: 60000
maxLifetimeMilliseconds: 1800000
maxPoolSize: 50
minPoolSize: 1
read_ds_0:
url: jdbc:mysql://127.0.0.1:3306/ds1?serverTimezone=UTC&useSSL=false
username: root
password: 123456
connectionTimeoutMilliseconds: 30000
idleTimeoutMilliseconds: 60000
maxLifetimeMilliseconds: 1800000
maxPoolSize: 50
minPoolSize: 1
rules:
- !READWRITE_SPLITTING
dataSources:
readwrite_ds:
type: Static
props:
write-data-source-name: write_ds
read-data-source-names: read_ds_0,read_ds_1
loadBalancerName: random
loadBalancers:
random:
type: RANDOM
```
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