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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 22126] New: - MySQL Connector J - JDBC Realm needs two attempts to open new connection
Date Tue, 05 Aug 2003 09:31:20 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=22126

MySQL Connector J - JDBC Realm needs two attempts to open new connection

           Summary: MySQL Connector J - JDBC Realm needs two attempts to
                    open new connection
           Product: Tomcat 4
           Version: 4.1.24
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Unknown
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: danny@apache.org


Using MySQL connector-J instead of mm.mysql jdbc driver.
If the database "goes away" DBCP throws an exception (below) and fails to
authenticate, at the second attempt a new connection is established and
authentication succeeds.

I've noticed that Connector J exhibits at least two radically different
behaviours that the old mm.mysql driver, throwing this exception is one of them.

If the tomcat code calls Connection.isClosed() connector J doesn't ping the
server, mm.mysql did.

Exception performing authentication
java.sql.SQLException: Communication link failure: java.io.IOException
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1675)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1083)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1142)
        at com.mysql.jdbc.Connection.execSQL(Connection.java:1876)
        at
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1590)
        at
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1463)
        at org.apache.catalina.realm.JDBCRealm.authenticate(JDBCRealm.java:445)

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