启动Solr时报 _version_ field must exist in schema 错误的解决方法

Solr启动时报 

org.apache.solr.common.SolrException:org.apache.solr.common.SolrException:

Unable to use updateLog: _version_field must exist in schema,

using indexed="true" stored="true" and multiValued="false" (_version_ does not exist) 

解决的方法是：在solr的schema.xml文件中加一个 名为 _version_ 的Field