Solr - Error when posting an “Add” to the server

Question

I'm Posting the following to the Solr Server:

<add>
    <doc>
        <field name="uniqueid">5453543</field>
        <field name="modifieddate">2008-12-03T15:49:00Z</field>
        <field name="title">My Record</field>
        <field name="description">Descirption 
        Details
</field>
        <field name="startdate">2009-01-21T15:26:05.680Z</field>
        <field name="enddate">2009-01-21T15:26:05.697Z</field>
        <field name="Telephone_number">11111 111 111(text phone)</field>
        <field name="Telephone_number">11111 111 111</field>
        <field name="Mobile_number">1111111111</field>
    </doc>
</add>

I'm using SolrNet to send the documents here's an extract from the code (s is the above xml):

public string Post(string relativeUrl, string s) 
{
    var u = new UriBuilder(serverURL);
    u.Path += relativeUrl;
    var request = httpWebRequestFactory.Create(u.Uri);
    request.Method = HttpWebRequestMethod.POST;
    request.KeepAlive = false;
    if (Timeout > 0)
        request.Timeout = Timeout;
    request.ContentType = "text/xml; charset=utf-8";
    request.ContentLength = s.Length;
    request.ProtocolVersion = HttpVersion.Version10;
    try 
    {
        using (var postParams = request.GetRequestStream()) 
        {
            postParams.Write(xmlEncoding.GetBytes(s), 0, s.Length);
            using (var response = request.GetResponse()) 
            {
                using (var rStream = response.GetResponseStream()) 
                {
                    string r = xmlEncoding.GetString(ReadFully(rStream));
                    //Console.WriteLine(r);
                    return r;
                }
            }
        }
    } 
    catch (WebException e) 
    {
        throw new SolrConnectionException(e);
    }
}

When it gets to request.GetResponse it failed with this error:

base {System.InvalidOperationException} = {"The remote server returned an error: (500) Internal Server Error."}

When i look on the server in the Logs for apache it gives the following reason:

Unexpected end of input block in end

Here's the full stack trace:

Sep 17, 2009 10:13:53 AM org.apache.solr.common.SolrException log SEVERE: com.ctc.wstx.exc.WstxEOFException: Unexpected end of input block in end tag at [row,col {unknown-source}]: [26,1266] at com.ctc.wstx.sr.StreamScanner.throwUnexpectedEOB(StreamScanner.java:700) at com.ctc.wstx.sr.StreamScanner.loadMoreFromCurrent(StreamScanner.java:1054) at com.ctc.wstx.sr.StreamScanner.getNextCharFromCurrent(StreamScanner.java:811) at com.ctc.wstx.sr.BasicStreamReader.readEndElem(BasicStreamReader.java:3211) at com.ctc.wstx.sr.BasicStreamReader.nextFromTree(BasicStreamReader.java:2832) at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1019) at org.apache.solr.handler.XmlUpdateRequestHandler.processUpdate(XmlUpdateRequestHandler.java:148) at org.apache.solr.handler.XmlUpdateRequestHandler.handleRequestBody(XmlUpdateRequestHandler.java:123) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1204) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:303) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:232) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859) at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:574) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1527) at java.lang.Thread.run(Thread.java:619)

Please note the Solr server is running on the following system:

Microsoft Windows Server 2003 R2 Apache Tomcat 6

Finally here's my question:

The Xml i'm sending looks ok to me.. Does anyone have an ideas as to why Solr is throwing this exception?

Thanks

Dave

Edit Answer is as follows:

public string Post(string relativeUrl, string s) 
{
    var u = new UriBuilder(serverURL);
    u.Path += relativeUrl;
    var request = httpWebRequestFactory.Create(u.Uri);
    request.Method = HttpWebRequestMethod.POST;
    request.KeepAlive = false;
    if (Timeout > 0)
        request.Timeout = Timeout;
    request.ContentType = "text/xml; charset=utf-8";
    request.ProtocolVersion = HttpVersion.Version10;
    try 
    {
        // Set the Content length after the size of the byte array has been calculated.
        byte[] data = xmlEncoding.GetBytes(s);
        request.ContentLength = s.Length;
        using (var postParams = request.GetRequestStream()) 
        {
            postParams.Write(data, 0, data.Length);
            using (var response = request.GetResponse()) 
            {
                using (var rStream = response.GetResponseStream()) 
                {
                    string r = xmlEncoding.GetString(ReadFully(rStream));
                    //Console.WriteLine(r);
                    return r;
                }
            }
        }
    } 
    catch (WebException e) 
    {
        throw new SolrConnectionException(e);
    }
}

Answer 1

I'm not much familiar with .Net or Solr or .Net port of Solr. But, here is my guess.

postParams.Write(xmlEncoding.GetBytes(s), 0, s.Length);

There are two possible errors.

1. When you are getting bytes from String, you should specify the encoding. It might be the case that the default encoding is different from UTF8, which you have set in content type header in response.
2. The third parameter in Write() probabably refers to the length of byte array which you got from GetBytes(). The byte array could be longer than the length of string.