SQL Database Toolbox Communication Error - Caused by: java.net.S​ocketExcep​tion: Software caused connection abort: recv failed

Hi,

I am experiencing a communication failure problem while trying to write to a database via MATLAB Database Toolbox.

Though I am trying to ensure that the connection object is valid before using it, I somehow end up with this error.

      while(~isconnection(conn))
          conn = database('', username , password , 'com.mysql.jdbc.Driver', url);
          hand = conn.Handle;
          StatementObject = hand.prepareStatement(insertcommand);
      end

In this particular run, I had the code run for 4 days and it caused the problem during the 2nd day - It's not even clear when this error would be caused since I require my code to run for a few days continuously.

Please let me know what could I do to prevent this issue.

Thanks, Chaitanya

The exact error message is pasted below:

------------------------------------------------------------------------------------

Java exception occurred: java.sql.SQLException: Could not retrieve transation read-only status server

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:975)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:920)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:951)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:941)

at com.mysql.jdbc.ConnectionImpl.isReadOnly(ConnectionImpl.java:3939)

at com.mysql.jdbc.ConnectionImpl.isReadOnly(ConnectionImpl.java:3910)

at com.mysql.jdbc.PreparedStatement.checkReadOnlySafeStatement(PreparedStatement.java:1258)

at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1278)

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 43,090,699 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)

at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3673)

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3562)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4113)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2570)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2731)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2812)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2761)

at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1612)

at com.mysql.jdbc.ConnectionImpl.isReadOnly(ConnectionImpl.java:3933)

... 3 more

Caused by: java.net.SocketException: Software caused connection abort: recv failed

at java.net.SocketInputStream.socketRead0(Native Method)

at java.net.SocketInputStream.read(Unknown Source)

at com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:114)

at com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:161)

at com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:189)

at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3116)

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3573)

... 11 more

------------------------------------------------------------------------------------

Answer 1

[Lucas]

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