        throws <a href="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a>,
                                             <a href="../../../../../org/apache/nutch/protocol/ftp/FtpExceptionCanNotHaveDataConnection.html" title="class in org.apache.nutch.protocol.ftp">FtpExceptionCanNotHaveDataConnection</a></pre>
<div class="block">open a passive data connection socket</div>
<dl><dt><span class="strong">Parameters:</span></dt><