Stacktrace

Error message:net.sf.regain.util.sharedtag.taglib.ExtendedJspException: Writing results failed (Getting hit #500 failed)
	at net.sf.regain.util.sharedtag.taglib.SharedTagWrapperTag.doStartTag(Unknown Source)
	at org.apache.jsp.search_jsp._jspService(search_jsp.java:715)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:65)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:501)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:359)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:310)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:197)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:142)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:142)
	at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
	at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
	at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:405)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:142)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:165)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:88)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:535)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:86)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:782)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:71)
	at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:781)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:348)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:410)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:71)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:1307)
	at org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor.doRun(Nio2Endpoint.java:1676)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:74)
	at org.apache.tomcat.util.net.AbstractEndpoint.processSocket(AbstractEndpoint.java:1859)
	at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$2.completed(Nio2Endpoint.java:629)
	at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$2.completed(Nio2Endpoint.java:605)
	at java.base/sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:129)
	at java.base/sun.nio.ch.Invoker$2.run(Invoker.java:221)
	at java.base/sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:113)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:976)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:494)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:80)
	at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: net.sf.regain.RegainException: Getting hit #500 failed
	at net.sf.regain.search.sharedlib.ListTag.writeHitToAttributes(Unknown Source)
	at net.sf.regain.search.sharedlib.ListTag.printStartTag(Unknown Source)
	... 43 more
Caused by: net.sf.regain.RegainException: Error while accessing index
	at net.sf.regain.search.results.SearchResultsImpl.getHitDocument(Unknown Source)
	... 45 more
Caused by: java.lang.ArrayIndexOutOfBoundsException