异常信息：
msg=SolrCore 'collection1' is not available due to init failure: Could not load conf for core collection1: Error loading solr config from solr/collection1/conf/solrconfig.xml,trace=org.apache.solr.common.SolrException: SolrCore 'collection1' is not available due to init failure: Could not load conf for core collection1: Error loading solr config from solr/collection1/conf/solrconfig.xml at org.apache.solr.core.CoreContainer.getCore(CoreContainer.java:745)
异常原因：
可能是在 tomcat 配置 solr 时，修改配置文件后没有去掉原来的注释。
解决方法：
检查配置文件 web.xml 。