NullPointerException when executing SolrQuery with SolrJ

From Foochal

Caused by: org.apache.solr.client.solrj.SolrServerException: org.apache.solr.client.solrj.SolrServerException: java.lang.NullPointerException
	at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer.request(EmbeddedSolrServer.java:161)
	at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:90)
	... 32 more
Caused by: org.apache.solr.client.solrj.SolrServerException: java.lang.NullPointerException
	at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer.request(EmbeddedSolrServer.java:149)
	... 33 more
Caused by: java.lang.NullPointerException
	at org.apache.solr.common.util.StrUtils.splitSmart(StrUtils.java:37)
	at org.apache.solr.search.OldLuceneQParser.parse(LuceneQParserPlugin.java:104)
	at org.apache.solr.search.QParser.getQuery(QParser.java:88)
	at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:82)
	at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:148)
	at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
	at org.apache.solr.core.SolrCore.execute(SolrCore.java:1204)
	at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer.request(EmbeddedSolrServer.java:147)
	... 33 more