qiaojialin opened a new issue #2624:
URL: https://github.com/apache/iotdb/issues/2624
version 0.11.2:
When reusing IoTDBStatement to do queries. The Set<queryId> in
statementId2QueryId is never removed unless the statment is clsoed.
This will cause OOM if using a Statement is used for too long time.
Reproduce: This may take a long time to OOM...
```
package org.apache.iotdb;
import org.apache.iotdb.jdbc.IoTDBSQLException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class JDBCExample {
public static void main(String[] args) throws ClassNotFoundException,
SQLException {
Class.forName("org.apache.iotdb.jdbc.IoTDBDriver");
try (Connection connection =
DriverManager.getConnection("jdbc:iotdb://127.0.0.1:6667/", "root", "root");
Statement statement = connection.createStatement()) {
while (true) {
//set JDBC fetchSize
ResultSet resultSet = statement.executeQuery("select * from root");
resultSet.close();
}
} catch (IoTDBSQLException e) {
System.out.println(e.getMessage());
}
}
}
```
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