Solr update failing on remote server but works locally??

[Phil Scadden]

I am attempted to redo an index job. The delete query worked fine but on 
reindex, I get this:
09:42:51,061 ERROR ConcurrentUpdateSolrClient:463 - error
org.apache.solr.common.SolrException: Bad Request



request: http://online-uat:8983/solr/prindex/update?wt=javabin&version=2
                at 
org.apache.solr.client.solrj.impl.ConcurrentUpdateSolrClient$Runner.sendUpdateStream(ConcurrentUpdateSolrClient.java:290)
                at 
org.apache.solr.client.solrj.impl.ConcurrentUpdateSolrClient$Runner.run(ConcurrentUpdateSolrClient.java:161)
                at 
org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor$1.run(ExecutorUtil.java:231)
                at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
                at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
                at java.lang.Thread.run(Thread.java:745)

The same code works fine when the solr instance is local on my test machine. 
The remote machine is reachable. The prindex core seems fine. A delete query to 
remove old index executed fine. But update fails. I am not sure to begin 
looking. "Sendupdatestream" would indicate solr.up is trying to send the string 
but some the request format is wrong????
http://online-uat:8983/solr/prindex/select?q=*:*
just returns:
<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">0</int>
<lst name="params">
<str name="q">*:*</str>
</lst>
</lst>
<result name="response" numFound="0" start="0"/>
</response>

Which is consistant with deleting everything but having the syntax correct?

The updating code is:
       ConcurrentUpdateSolrClient solr = new 
ConcurrentUpdateSolrClient(solrProperties.getServer(),10,2);

                                ....

            File f = new File(filename);
             ContentHandler textHandler = new 
BodyContentHandler(Integer.MAX_VALUE);
             Metadata metadata = new Metadata();
             Parser parser = new AutoDetectParser();
             ParseContext context = new ParseContext();
             if (filename.toLowerCase().contains("pdf")) {
               PDFParserConfig pdfConfig = new PDFParserConfig();
               pdfConfig.setOcrStrategy(PDFParserConfig.OCR_STRATEGY.NO_OCR);
               context.set(PDFParserConfig.class,pdfConfig);
               context.set(Parser.class,parser);
             }
             InputStream input = new FileInputStream(f);
             try {
               parser.parse(input, textHandler, metadata, context);
             } catch (Exception e) {
               e.printStackTrace();
               return false;
              }
             SolrInputDocument up = new SolrInputDocument();
             if (title==null) title = metadata.get("title");
             if (author==null) author = metadata.get("author");
             up.addField("id",f.getCanonicalPath());
             up.addField("location",idString);
             up.addField("access",access);
             up.addField("datasource",datasource);
             up.addField("title",title);
             up.addField("author",author);
             String content = textHandler.toString();
             up.addField("_text_",content);
             solr.add(up);
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