一、异常描述
通过Tomcat启动Apache Solr应用服务报异常“org.apache.solr.common.SolrException; null:java.lang.IllegalStateException: getWriter() has already been called for this response”，访问界面报“SolrCore Initialization Failures..org.apache.solr.common.SolrException:org.apache.solr.common.SolrException:Error Instantiating Update Handler,solr DirectUpdateHandler2 failed to instantiate org.apache.solr.update.UpdateHandler”异常，如下图所示
异常日志如下
ERROR - 2017-03-02 08:47:49.284; org.apache.solr.common.SolrException; null:java.lang.IllegalStateException: getWriter() has already been called for this response@b@ at org.apache.catalina.connector.Response.getOutputStream(Response.java:580)@b@ at org.apache.catalina.connector.ResponseFacade.getOutputStream(ResponseFacade.java:183)@b@ at org.apache.solr.servlet.SolrDispatchFilter.writeResponse(SolrDispatchFilter.java:643)@b@ at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:375)@b@ at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:158)@b@ at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)@b@ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)@b@ at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)@b@ at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)@b@ at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)@b@ at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)@b@ at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)@b@ at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)@b@ at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)@b@ at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)@b@ at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)@b@ at java.lang.Thread.run(Thread.java:745)
二、解决步骤
1.关闭tomcat应用服务
2.打开classes路径下jcesg.properties中关于lexicon.path配置路径，删除solr-md/subject/data的索引数据
3. 重启服务，问题解决了