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HTTP Status 500 – Internal Server Error

<!doctype html><html lang="en"><head><title>HTTP Status 500 – Internal Server Error</title><style type="text/css">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP Status 500 – Internal Server Error</h1><hr class="line" /><p><b>Type</b> Exception Report</p><p><b>Message</b> An exception occurred processing [opac&#47;cbl&#47;ricerca.jsp] at line [25]</p><p><b>Description</b> The server encountered an unexpected condition that prevented it from fulfilling the request.</p><p><b>Exception</b></p><pre>org.apache.jasper.JasperException: An exception occurred processing [opac&#47;cbl&#47;ricerca.jsp] at line [25] 22: rpn = rpnstart + rpn.replaceAll(&quot;\&quot;&quot;,&quot;%22&quot;); 23: 24: %&gt; 25: &lt;jsp:forward page=&quot;&#47;opaclib&quot;&gt; 26: &lt;jsp:param name=&quot;db&quot; value=&quot;solr_cbl&quot; &#47;&gt; 27: &lt;jsp:param name=&quot;select_db&quot; value=&quot;solr_cbl&quot; &#47;&gt; 28: &lt;jsp:param name=&quot;nentries&quot; value=&quot;10&quot; &#47;&gt; Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:611) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:490) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:378) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:326) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) </pre><p><b>Root Cause</b></p><pre>javax.servlet.ServletException: java.io.IOException: Query does not to have a valid default attrset it.inera.opaclib.web.OpaclibServlet.doGet(OpaclibServlet.java:109) javax.servlet.http.HttpServlet.service(HttpServlet.java:626) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:528) org.apache.jsp.opac.cbl.ricerca_jsp._jspService(ricerca_jsp.java:142) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:71) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:467) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:378) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:326) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) </pre><p><b>Root Cause</b></p><pre>java.io.IOException: Query does not to have a valid default attrset it.inera.opaclib.solr.rpn2solr.RpnToSolr.toSolr(RpnToSolr.java:256) it.inera.opaclib.multirequest.ParamsHelper.loadParams(ParamsHelper.java:287) it.inera.opaclib.web.command.ZCommand.execute(ZCommand.java:43) it.inera.opaclib.web.OpaclibServlet.doGet(OpaclibServlet.java:103) javax.servlet.http.HttpServlet.service(HttpServlet.java:626) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:528) org.apache.jsp.opac.cbl.ricerca_jsp._jspService(ricerca_jsp.java:142) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:71) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:467) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:378) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:326) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) </pre><p><b>Note</b> The full stack trace of the root cause is available in the server logs.</p><hr class="line" /><h3>Apache Tomcat/9.0.43 (Debian)</h3></body></html>