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Posted to notifications@shardingsphere.apache.org by GitBox <gi...@apache.org> on 2020/09/22 03:48:39 UTC
[GitHub] [shardingsphere] tuohai666 opened a new issue #7549: Operation not allowed after ResultSet closed
tuohai666 opened a new issue #7549:
URL: https://github.com/apache/shardingsphere/issues/7549
## Bug Report
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### Which version of ShardingSphere did you use?
5.0.0-RC1-SNAPSHOT
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy
### Expected behavior
Execute transaction correct.
### Actual behavior
An exception fired when execute a general SQL in local transaction:
```
java.sql.SQLException: Operation not allowed after ResultSet closed
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:898)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:887)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:861)
at com.mysql.jdbc.ResultSetImpl.checkClosed(ResultSetImpl.java:743)
at com.mysql.jdbc.ResultSetImpl.getMetaData(ResultSetImpl.java:2780)
at com.zaxxer.hikari.pool.HikariProxyResultSet.getMetaData(HikariProxyResultSet.java)
at org.apache.shardingsphere.infra.executor.sql.resourced.jdbc.queryresult.StreamQueryResult.<init>(StreamQueryResult.java:45)
at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.ProxySQLExecutorCallback.createQueryResult(ProxySQLExecutorCallback.java:121)
at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.ProxySQLExecutorCallback.executeSQL(ProxySQLExecutorCallback.java:87)
at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.ProxySQLExecutorCallback.executeSQL(ProxySQLExecutorCallback.java:77)
at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.ProxySQLExecutorCallback.executeSQL(ProxySQLExecutorCallback.java:48)
at org.apache.shardingsphere.infra.executor.sql.resourced.jdbc.executor.impl.DefaultSQLExecutorCallback.execute0(DefaultSQLExecutorCallback.java:75)
at org.apache.shardingsphere.infra.executor.sql.resourced.jdbc.executor.impl.DefaultSQLExecutorCallback.execute(DefaultSQLExecutorCallback.java:57)
at org.apache.shardingsphere.infra.executor.kernel.ExecutorKernel.syncExecute(ExecutorKernel.java:99)
at org.apache.shardingsphere.infra.executor.kernel.ExecutorKernel.serialExecute(ExecutorKernel.java:84)
at org.apache.shardingsphere.infra.executor.kernel.ExecutorKernel.execute(ExecutorKernel.java:78)
at org.apache.shardingsphere.infra.executor.sql.resourced.jdbc.executor.SQLExecutor.execute(SQLExecutor.java:66)
at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.JDBCExecuteEngine.executeWithManagedResource(JDBCExecuteEngine.java:112)
at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.JDBCExecuteEngine.execute(JDBCExecuteEngine.java:105)
at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.JDBCExecuteEngine.execute(JDBCExecuteEngine.java:85)
at org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.doExecute(JDBCDatabaseCommunicationEngine.java:102)
at org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.execute(JDBCDatabaseCommunicationEngine.java:85)
at org.apache.shardingsphere.proxy.backend.text.admin.UnicastBackendHandler.execute(UnicastBackendHandler.java:62)
at org.apache.shardingsphere.proxy.frontend.mysql.command.query.text.query.MySQLComQueryPacketExecutor.execute(MySQLComQueryPacketExecutor.java:71)
at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:100)
at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:76)
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)
```
### Reason analyze (If you can)
In CommandExecutorTask:
```
} finally {
if (isNeedFlush) {
context.flush();
}
**Collection<SQLException> exceptions = closeExecutionResources();**
if (!backendConnection.getTransactionStatus().isInConnectionHeldTransaction()) {
exceptions.addAll(backendConnection.closeConnections(false));
}
processClosedExceptions(exceptions);
rootInvokeHook.finish(connectionSize);
}
```
**closeExecutionResources** will close ResultSet and Statement of JDBC. There's no wait notify mechanism for this procedure.
If closeExecutionResources for the previous SQL query doesn't finish, and the next SQL put the ResultSet or Statement into cache, the cache will be cleared by the previous close behavior. The second will throw this exception or a null pointer exception.
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.
### Example codes for reproduce this issue (such as a github link).
----------------------------------------------------------------
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[GitHub] [shardingsphere] terrymanu closed issue #7549: Operation not allowed after ResultSet closed
Posted by GitBox <gi...@apache.org>.
terrymanu closed issue #7549:
URL: https://github.com/apache/shardingsphere/issues/7549
----------------------------------------------------------------
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[GitHub] [shardingsphere] terrymanu closed issue #7549: Operation not allowed after ResultSet closed
Posted by GitBox <gi...@apache.org>.
terrymanu closed issue #7549:
URL: https://github.com/apache/shardingsphere/issues/7549
----------------------------------------------------------------
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