FlyingZC opened a new issue, #19891:
URL: https://github.com/apache/shardingsphere/issues/19891
## Bug Report
### Which version of ShardingSphere did you use?
master
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
proxy
### Expected behavior
not report expection
### Actual behavior
throws `java.lang.IllegalArgumentException: bound must be positive`
### Reason analyze (If you can)
```
java.lang.IllegalArgumentException: bound must be positive
at
java.util.concurrent.ThreadLocalRandom.nextInt(ThreadLocalRandom.java:351)
at
org.apache.shardingsphere.readwritesplitting.algorithm.loadbalance.RandomReadQueryLoadBalanceAlgorithm.getDataSource(RandomReadQueryLoadBalanceAlgorithm.java:46)
at
org.apache.shardingsphere.readwritesplitting.route.impl.ReadwriteSplittingDataSourceRouter.route(ReadwriteSplittingDataSourceRouter.java:49)
at
org.apache.shardingsphere.readwritesplitting.route.ReadwriteSplittingSQLRouter.decorateRouteContext(ReadwriteSplittingSQLRouter.java:61)
at
org.apache.shardingsphere.readwritesplitting.route.ReadwriteSplittingSQLRouter.decorateRouteContext(ReadwriteSplittingSQLRouter.java:40)
at
org.apache.shardingsphere.infra.route.engine.impl.PartialSQLRouteExecutor.route(PartialSQLRouteExecutor.java:59)
at
org.apache.shardingsphere.infra.route.engine.SQLRouteEngine.route(SQLRouteEngine.java:53)
at
org.apache.shardingsphere.infra.context.kernel.KernelProcessor.route(KernelProcessor.java:57)
at
org.apache.shardingsphere.infra.context.kernel.KernelProcessor.generateExecutionContext(KernelProcessor.java:49)
at
org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.execute(JDBCDatabaseCommunicationEngine.java:117)
at
org.apache.shardingsphere.proxy.frontend.mysql.command.query.text.query.MySQLComQueryPacketExecutor.execute(MySQLComQueryPacketExecutor.java:94)
at
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:112)
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:750)
```
<img width="933" alt="image"
src="https://user-images.githubusercontent.com/19788130/183016408-1d117181-ff48-4b19-a1e8-fc3ad35d9d55.png";>
The param of `ThreadLocalRandom.current().nextInt()` must be a positive
number.
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
```sql
mysql> DISABLE READWRITE_SPLITTING READ read_ds_1;
Query OK, 0 rows affected (2 min 32.83 sec)
mysql> DISABLE READWRITE_SPLITTING READ read_ds_0;
Query OK, 0 rows affected (0.06 sec)
mysql> select * from t_order;
ERROR 1997 (C1997): Runtime exception: [bound must be positive]
```
### Example codes for reproduce this issue (such as a github link).
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![https://user-images.githubusercontent.com/19788130/183016408-1d117181-ff48-4b19-a1e8-fc3ad35d9d55.png"](https://user-images.githubusercontent.com/19788130/183016408-1d117181-ff48-4b19-a1e8-fc3ad35d9d55.png"){kind=link}