What do I have to do to avoid error of “out of memory”, when connection by jdbc with sqlite3 database?

Question

What do I have to do to avoid error of "out of memory", when connection by jdbc with sqlite3 database?

java.sql.SQLException: out of memory
at org.sqlite.DB.throwex(DB.java:288)
    at org.sqlite.NestedDB._open(NestedDB.java:73)
    at org.sqlite.DB.open(DB.java:77)
    at org.sqlite.Conn.<init>(Conn.java:88)
    at org.sqlite.JDBC.connect(JDBC.java:64)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at action.Actions.<init>(Actions.java:18)
    at controler.ClientControler.<init>(ClientControler.java:14)
    at main.Main.main(Main.java:20)


Class.forName("org.sqlite.JDBC");
conn = DriverManager.getConnection("jdbc:sqlite:clients.db");

Answer 1

This suggests that your clients.db file couldn't be found. Try locating that file more appropriately. Scroll down to the section entitled "How to Specify Database Files".

I downloaded the SQLite JAR, put it in my CLASSPATH, and found a tutorial here that worked perfectly in less than five minutes . It put test.db in my project root, as expected.

I've rewritten that tutorial the way I'd do it. It works. Don't say it brings nothing.

package sqlite;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

public class Test
{

    private static final String DEFAULT_DRIVER = "org.sqlite.JDBC";
    private static final String DEFAULT_URL = "jdbc:sqlite:data/test.db";

    public static void main(String[] args)
    {
        Connection conn = null;
        try
        {
            conn = createConnection(DEFAULT_DRIVER, DEFAULT_URL);
            createTable(conn);

            List<Person> people = new ArrayList<Person>();
            people.add(new Person("Gandhi", "politics"));
            people.add(new Person("Wittgenstein", "philosophy"));
            people.add(new Person("Turing", "computers"));
            saveAll(conn, people);

            List<Person> rows = findAll(conn);
            System.out.println(rows);
        }
        catch (ClassNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (SQLException e)
        {
            e.printStackTrace();
        }
        finally
        {
            close(conn);
        }
    }

    private static List<Person> findAll(Connection conn) throws SQLException
    {
        List<Person> rows = new ArrayList<Person>();
        ResultSet rs = null;
        Statement stat = null;

        try
        {
            stat = conn.createStatement();
            rs = stat.executeQuery("select * from people;");
            while (rs.next())
            {
                rows.add(new Person(rs.getString("name"), rs.getString("occupation")));
            }
        }
        finally
        {
            close(stat);
            close(rs);
        }

        return rows;
    }

    private static void saveAll(Connection conn, List<Person> people) throws SQLException
    {
        PreparedStatement prep = null;
        try
        {
            prep = conn.prepareStatement("insert into people values (?, ?);");

            for (Person person : people)
            {
                prep.setString(1, person.getName());
                prep.setString(2, person.getOccupation());
                prep.addBatch();
            }

            conn.setAutoCommit(false);
            prep.executeBatch();
            conn.setAutoCommit(true);
        }
        finally
        {
            close(prep);
        }
    }

    private static void createTable(Connection conn) throws SQLException
    {
        Statement stat = null;
        try
        {
            stat = conn.createStatement();
            stat.executeUpdate("drop table if exists people;");
            stat.executeUpdate("create table people (name, occupation);");
        }
        finally
        {
            close(stat);
        }
    }

    private static Connection createConnection(String driver, String url) throws ClassNotFoundException, SQLException
    {
        Class.forName(DEFAULT_DRIVER);
        Connection conn = DriverManager.getConnection(DEFAULT_URL);

        return conn;
    }

    private static void close(Connection conn)
    {
        try
        {
            if (conn != null)
            {
                conn.close();
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }


    private static void close(Statement stat)
    {
        try
        {
            if (stat != null)
            {
                stat.close();
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    private static void close(ResultSet rs)
    {
        try
        {
            if (rs != null)
            {
                rs.close();
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}

class Person
{
    private String name;
    private String occupation;

    Person(String name, String occupation)
    {
        this.name = name;
        this.occupation = occupation;
    }

    public String getName()
    {
        return this.name;
    }

    public String getOccupation()
    {
        return this.occupation;
    }

    public String toString() {
        StringBuilder sb = new StringBuilder();

        sb.append("{ name: ").append(this.name).append(", occupation: ").append(this.occupation).append(" }");

        return sb.toString();
    }
}

Answer 2

Yes, in case when file not found it generates such strange exception "out of memory". In Eclipse IDE instead specifying database name and path separately, put database file name into field: Database location.

Example: Database location: c:\temp\test.db

Answer 3

I have the same problem here, and I think we have run into some bug. The exception is absolutely not caused by "the file non existing": I carefully checked it with a proper test case.

The database itself is created using sqlite3 official command line tool, so no corrupt database either. I can safely tell you the lib is broken somehow.

Please tell me what is your OS and JVM version so that I see if it matches mine, and we can prepare a bug report.

Answer 4

I came across this issue trying to connect via Eclipse's "Data Source Explorer".

On a Mac, when I double clicked the file name in the browse prompt the database location was populated with the folder and the database with the file name. When I manually added the database file to the "Database Location" field I was then able to connect.

Answer 5

If path to your database contains any spaces JDBC can't find it. For example C:/Program Files is wrong. Must be C:/Program_Files . I had same problem and now it works.

Answer 6

Like DarkCthulhu already mentioned you must not have any spaces in the path to your database file. This applies even if you declared a relative path to it (like in your case). I bet the path to your project contains one or more spaces.

You can either declare it with its full path and spaces escaped, or by changing your project location to a path without any spaces!

Answer 7

I just faced the same problem and I solved it. I was using IntelliJ as my IDE. I will show you how i fixed the problem by screen shots, step by step. Hope this will help you.
1- go to view | tool windows | database.
2- now a window containing the name of your databases is open in the right hand.select the database you want, then tap "alt+Enter"
now, on the opened window, make sure that you have filled the textboxes correct ! ( they should include the "fileName". directory is not enough!! )

Answer 8

I had the same problem. My solution is update the dependency sqlite-jdbc from version 3.7.2 to 3.16.1