Program: 63414
Project: 63414
Buggy source:
/** 
 * INTERNAL: Applies customization to connection. Called only if connection is not already customized (isActive()==false). The method may throw SQLException wrapped into DatabaseException. isActive method called after this method should return true only in case the connection was actually customized.
 */
public void customize(){
  if (proxyProperties == null) {
    buildProxyProperties();
  }
  Connection connection=accessor.getConnection();
  if (connection instanceof OracleConnection) {
    oracleConnection=(OracleConnection)connection;
  }
 else {
    connection=session.getServerPlatform().unwrapConnection(connection);
    if (connection instanceof OracleConnection) {
      oracleConnection=(OracleConnection)connection;
    }
 else {
      throw ValidationException.oracleJDBC10_1_0_2ProxyConnectorRequiresOracleConnection();
    }
  }
  try {
    clearConnectionCache();
    Object[] args=null;
    if (this.session.shouldLog(SessionLog.FINEST,SessionLog.CONNECTION)) {
      Properties logProperties=proxyProperties;
      if (proxyProperties.containsKey(OracleConnection.PROXY_USER_PASSWORD)) {
        logProperties=(Properties)proxyProperties.clone();
        logProperties.setProperty(OracleConnection.PROXY_USER_PASSWORD,"String_Node_Str");
      }
      args=new Object[]{oracleConnection,logProperties};
    }
    if (oracleConnection.isProxySession()) {
      try {
        if (args != null) {
          ((AbstractSession)this.session).log(SessionLog.FINEST,SessionLog.CONNECTION,"String_Node_Str",args);
        }
        oracleConnection.close(OracleConnection.PROXY_SESSION);
      }
 catch (      SQLException exception) {
        this.session.getSessionLog().logThrowable(SessionLog.WARNING,SessionLog.CONNECTION,exception);
      }
    }
    oracleConnection.openProxySession(proxyType,proxyProperties);
    if (args != null) {
      ((AbstractSession)this.session).log(SessionLog.FINEST,SessionLog.CONNECTION,"String_Node_Str",args);
    }
  }
 catch (  SQLException exception) {
    oracleConnection=null;
    throw DatabaseException.sqlException(exception);
  }
catch (  NoSuchMethodError noSuchMethodError) {
    oracleConnection=null;
    throw ValidationException.oracleJDBC10_1_0_2ProxyConnectorRequiresOracleConnectionVersion();
  }
}

Fixed version (ground truth):
/** 
 * INTERNAL: Applies customization to connection. Called only if connection is not already customized (isActive()==false). The method may throw SQLException wrapped into DatabaseException. isActive method called after this method should return true only in case the connection was actually customized.
 */
public void customize(){
  if (proxyProperties == null) {
    buildProxyProperties();
  }
  Connection connection=accessor.getConnection();
  if (connection instanceof OracleConnection) {
    oracleConnection=(OracleConnection)connection;
  }
 else {
    connection=session.getServerPlatform().unwrapConnection(connection);
    if (connection instanceof OracleConnection) {
      oracleConnection=(OracleConnection)connection;
    }
 else {
      throw ValidationException.oracleJDBC10_1_0_2ProxyConnectorRequiresOracleConnection();
    }
  }
  try {
    clearConnectionCache();
    Object[] args=null;
    if (this.session.shouldLog(SessionLog.FINEST,SessionLog.CONNECTION)) {
      Properties logProperties=proxyProperties;
      if (proxyProperties.containsKey(OracleConnection.PROXY_USER_PASSWORD)) {
        logProperties=(Properties)proxyProperties.clone();
        logProperties.setProperty(OracleConnection.PROXY_USER_PASSWORD,"String_Node_Str");
      }
      args=new Object[]{oracleConnection,logProperties};
    }
    if (oracleConnection.isProxySession()) {
      try {
        if (args != null) {
          ((AbstractSession)this.session).log(SessionLog.FINEST,SessionLog.CONNECTION,"String_Node_Str",args);
        }
        oracleConnection.close(OracleConnection.PROXY_SESSION);
      }
 catch (      SQLException exception) {
        this.session.getSessionLog().logThrowable(SessionLog.WARNING,SessionLog.CONNECTION,exception);
      }
    }
    oracleConnection.openProxySession(proxyType,proxyProperties);
    oracleConnection.setAutoCommit(false);
    if (args != null) {
      ((AbstractSession)this.session).log(SessionLog.FINEST,SessionLog.CONNECTION,"String_Node_Str",args);
    }
  }
 catch (  SQLException exception) {
    oracleConnection=null;
    throw DatabaseException.sqlException(exception);
  }
catch (  NoSuchMethodError noSuchMethodError) {
    oracleConnection=null;
    throw ValidationException.oracleJDBC10_1_0_2ProxyConnectorRequiresOracleConnectionVersion();
  }
}