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no field name specified in query and no defaultspecified via 'df' param
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no field name specified in query and no default specified via 'df' param
org.apache.solr.common.SolrException: no field name specified in query and 
 no defaultspecified via 'df' param	at org.apache.solr.parser.SolrQueryParserBase.checkNullField(SolrQueryParserBase.java:701)	at org.apache.solr.parser.SolrQueryParserBase.getFieldQuery(SolrQueryParserBase.java:721)	at org.apache.solr.parser.SolrQueryParserBase.handleBareTokenQuery(SolrQueryParserBase.java:542)	at org.apache.solr.parser.QueryParser.Term(QueryParser.java:299)	at org.apache.solr.parser.QueryParser.Clause(QueryParser.java:185)	at org.apache.solr.parser.QueryParser.Query(QueryParser.java:107)	at org.apache.solr.parser.QueryParser.TopLevelQuery(QueryParser.java:96)	at org.apache.solr.parser.SolrQueryParserBase.parse(SolrQueryParserBase.java:152)	at org.apache.solr.search.LuceneQParser.parse(LuceneQParser.java:50)	at org.apache.solr.search.QParser.getQuery(QParser.java:141)	at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:145)	at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:197)	at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)	at org.apache.solr.core.SolrCore.execute(SolrCore.java:1952)	at org.apache.solr.core.QuerySenderListener.newSearcher(QuerySenderListener.java:64)	at org.apache.solr.core.SolrCore$5.call(SolrCore.java:1724)	at java.util.concurrent.FutureTask.run(FutureTask.java:262)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:744)