solr XML parser Exception

Question

I have configured the solr search engine. I followed the steps from Here

I am getting following error

Caused by: org.apache.solr.common.SolrException: org.xml.sax.SAXParseException;systemId: solrres:/solrconfig.xml; lineNumber: 813; columnNumber: 19; The content of elements must consist of well-formed character data or markup.
  at org.apache.solr.core.Config.<init>(Config.java:148)
  at org.apache.solr.core.Config.<init>(Config.java:86)
  at org.apache.solr.core.SolrConfig.<init>(SolrConfig.java:120)
  at org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:589)
  ... 11 more
used by: org.xml.sax.SAXParseException; systemId: solrres:/solrconfig.xml; lineNumber: 813; columnNumber: 19; The content of elements must consist of well-formed character data or markup.

I checked in configuration file. the error is at

<str name="mm"> 2<-1 5<-2 6<90% </str>

How can i configure the same, if i avoid to configure above what will happen.

Answer 1

As < > are xml characters, parsing would fail.
You would need to use > and < for > & < respectively in the Solr Config xml file.

e.g. <str name="mm">4 &lt; 100%</str>

Answer 2

Try replacing '<' with '<'. After changing that, the configuration will be 2<-1 5<-2 6<90%