title: Error adding field 'field_name'-'field_value' msg=For input string: \"field_Value\"
body: <p>We are struggling to import certain files into Solr occasionally. It seems like certain documents have weird meta data (values), not sure if it might be from eccentric word processor or something else. See two examples here:</p>
  
  <pre><code>Type:        Solarium\Exception\HttpException
  Message:     Solr HTTP error: OK (400)
  {"responseHeader":{"status":400,"QTime":49},"error":{"metadata":["error-class","org.apache.solr.common.SolrException","root-error-class","java.lang.NumberFormatException"],"msg":"ERROR: [doc=3932487729] Error adding field 'brightness_value'='6.18' msg=For input string: \"6.18\"","code":400}}
  </code></pre>
  
  <p>And</p>
  
  <pre><code>Type:        Solarium\Exception\HttpException
  Severity: error --&gt; Exception: Solr HTTP error: OK (400)
  {"responseHeader":{"status":400,"QTime":72},"error":{"metadata":["error-class","org.apache.solr.common.SolrException","root-error-class","java.lang.NumberFormatException"],"msg":"ERROR: [doc=16996] Error adding field 'version'='5.3.1' msg=For input string: \"5.3.1\"","code":400}}
  </code></pre>
  
  <p>How do we prevent these issues? We are not in control of the documents, so need to fix it on the server.</p>