Having problem posting to Https.

I am having trouble posting XML to an https address.
The code I cam using works about 90% of the time, but it fails 10%.
Here is the code:
java.io.DataInputStream dis = null;
javax.net.ssl.HttpsURLConnection httpsCon = null;
java.net.URL url = new java.net.URL(address);
java.io.OutputStream reply = null;
java.io.FileInputStream requestToSend = null;
httpsCon = (javax.net.ssl.HttpsURLConnection) url.openConnection();
httpsCon.setHostnameVerifier(new javax.net.ssl.HostnameVerifier()
{
public boolean verify(String hostname, javax.net.ssl.SSLSession session) {
return true;
}
});
httpsCon.setDoOutput(true);
if(soapAction != null) {
httpsCon.setRequestProperty("SOAPAction", soapAction);
}
httpsCon.connect();
reply = httpsCon.getOutputStream();
requestToSend = new java.io.FileInputStream(requestXML);
int byteLength = requestToSend.available();
byte[] data = new byte[byteLength];
requestToSend.read(data);
reply.write(data);
dis = new java.io.DataInputStream(httpsCon.getInputStream());

That last line it blows up with the error:
Server returned HTTP response code: 500.

I don't think the problem is with the server I am connecting.
This code works most of the time.

Originally posted by Dave Trower:

That last line it blows up with the error:
Server returned HTTP response code: 500.

I don't think the problem is with the server I am connecting.
This code works most of the time.

Since the response code "500" is the http status code for an "internal server error", I'd say the problem isn't in the code you've shown us. It could be with the data you are sending, but without looking at the server code and logs I don't think we have enough information to help you at this point.