However, the driver uses 'SHOWĬREATE TABLE' to retrieve this information, so when other GetCrossReference()) is only available from The driver will throw an exception if the connection isįoreign Key information (getImported/ExportedKeys() and Valid, you should issue a simple query, such as "SELECTġ".
If you need to determine if the connection is still Returns true if 'closed()' has been called on theĬonnection. In accordance with the JDBC specification, it only Method does not "ping" the server to determine if it isĪlive. Unlike older versions of MM.MySQL the 'isClosed()' This, you should use the tClob() method to The Clob implementation does not allow in-place Supported when connecting to MySQL version 5.0 or newer via the
Starting with Connector/J 3.1.1, stored procedures are Then delay loading the actual Blob data until you retrieve theīlob and call retrieval methods (getInputStream(), getBytes(), Table, the table must have a primary key, and the SELECT mustĬover all columns that make up the primary key. Use a column alias with the value of the column set to theĪctual name of the Blob column in the SELECT that you write to Starting with Connector/J version 3.1.0, you can emulateīlobs with locators by adding the property tBlob() or ResultSet.updateBlob() (in theĬase of updatable result sets) methods to save changes back to Modification (they are 'copies', as reported by theĭatabaseMetaData.locatorsUpdateCopies() method). I have tried swapping 127.0.0.1 with localhost too.The Blob implementation does not allow in-place ("Database connection terminated") Ĭatch (Exception e) String url = "jdbc:mysql://127.0.0.1:2273/PADPAL" Ĭlass.forName ("").newInstance () Ĭonn = DriverManager.getConnection (url, userName, password) Just for clarification, here is the class i'm currently using to try and connect (although I was originally using hibernate which gave the same issue): IF anyone has any ideas please let me know. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.Īt .readFully(MysqlIO.java:2332)Īt .reuseAndReadPacket(MysqlIO.java:2774)Īfter a trawl of google, the only thing I could find to change was to add mysqld to hosts.allow, which I did but to no avail. Last packet sent to the server was 360 ms ago.Īt 0(Native Method)Īt (Unknown Source)Īt (Unknown Source)Īt .newInstance(Unknown Source)Īt .handleNewInstance(Util.java:406)Īt .createCommunicationsException(SQLError.java:1074)Īt .createNewIO(ConnectionImpl.java:2104)Īt .(ConnectionImpl.java:729)Īt 4Connection.(JDBC4Connection.java:46)Īt .getInstance(ConnectionImpl.java:302)Īt .connect(NonRegisteringDriver.java:283)Īt (Unknown Source)Īt (Connect.java:16)Ĭaused by: .jdbc4.CommunicationsException: Communications link failureĪt .reuseAndReadPacket(MysqlIO.java:2873)Īt .reuseAndReadPacket(MysqlIO.java:2763)Īt .checkErrorPacket(MysqlIO.java:3299)Īt .checkErrorPacket(MysqlIO.java:894)Īt .doHandshake(MysqlIO.java:1309)Īt .createNewIO(ConnectionImpl.java:2032)Ĭaused by: java.io.EOFException: Can not read response from server. When I attempt to connect to a database (which i've tried using hibernate and manually), it comes up with the following trace:Ĭom.4.CommunicationsException: Communications link failure My set up is Java 6 with MySql 5 and developing in Eclipse on mandriva 2008, with ConnectorJ 5.0.8 (although i've tried with others too). If anyone can help, I will love you forever! I spent the entire day yesterday trying to get this working, trawling google and this forum, and it's just not happened, and i'm starting to go crazy.
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