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HTTP ERROR 500 javax.servlet.ServletException: javax.servlet.ServletException: An error occurred while processing request to /exist/rest/db/: An error occurred: Cannot invoke "org.exist.indexing.lucene.LuceneIndexConfig.getAnalyzer()" because "idxConf" is null

Caused by:

javax.servlet.ServletException: javax.servlet.ServletException: An error occurred while processing request to /exist/rest/db/: An error occurred: Cannot invoke "org.exist.indexing.lucene.LuceneIndexConfig.getAnalyzer()" because "idxConf" is null
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:162)
	at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:772)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.Server.handle(Server.java:516)
	at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
	at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: javax.servlet.ServletException: An error occurred while processing request to /exist/rest/db/: An error occurred: Cannot invoke "org.exist.indexing.lucene.LuceneIndexConfig.getAnalyzer()" because "idxConf" is null
	at org.exist.http.urlrewrite.XQueryURLRewrite.service(XQueryURLRewrite.java:366)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1450)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
	at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656)
	at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:292)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:552)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:571)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:234)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
	... 18 more
Caused by: javax.servlet.ServletException: An error occurred: Cannot invoke "org.exist.indexing.lucene.LuceneIndexConfig.getAnalyzer()" because "idxConf" is null
	at org.exist.http.servlets.EXistServlet.doGet(EXistServlet.java:363)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
	at org.exist.http.servlets.EXistServlet.service(EXistServlet.java:588)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1459)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
	at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:552)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:618)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:167)
	at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:81)
	at org.exist.http.urlrewrite.Forward.doRewrite(Forward.java:50)
	at org.exist.http.urlrewrite.XQueryURLRewrite.service(XQueryURLRewrite.java:203)
	... 41 more
Caused by: java.lang.NullPointerException: Cannot invoke "org.exist.indexing.lucene.LuceneIndexConfig.getAnalyzer()" because "idxConf" is null
	at org.exist.indexing.lucene.LuceneMatchListener.scanMatches(LuceneMatchListener.java:223)
	at org.exist.indexing.lucene.LuceneMatchListener.startElement(LuceneMatchListener.java:133)
	at org.exist.storage.serializers.NativeSerializer.serializeToReceiver(NativeSerializer.java:273)
	at org.exist.storage.serializers.NativeSerializer.serializeToReceiver(NativeSerializer.java:99)
	at org.exist.storage.serializers.Serializer.serializeToReceiver(Serializer.java:1135)
	at org.exist.storage.serializers.Serializer.toSAX(Serializer.java:936)
	at org.exist.dom.persistent.NodeProxy.toSAX(NodeProxy.java:778)
	at org.exist.xquery.functions.util.Expand.eval(Expand.java:132)
	at org.exist.xquery.BasicFunction.eval(BasicFunction.java:73)
	at org.exist.xquery.InternalFunctionCall.eval(InternalFunctionCall.java:62)
	at org.exist.xquery.UserDefinedFunction.eval(UserDefinedFunction.java:161)
	at org.exist.xquery.DynamicCardinalityCheck.eval(DynamicCardinalityCheck.java:73)
	at org.exist.xquery.DynamicTypeCheck.eval(DynamicTypeCheck.java:60)
	at org.exist.xquery.FunctionCall.evalFunction(FunctionCall.java:289)
	at org.exist.xquery.FunctionCall.eval(FunctionCall.java:207)
	at org.exist.xquery.LetExpr.eval(LetExpr.java:98)
	at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:71)
	at org.exist.xquery.ForExpr.processItem(ForExpr.java:248)
	at org.exist.xquery.ForExpr.eval(ForExpr.java:187)
	at org.exist.xquery.LetExpr.eval(LetExpr.java:110)
	at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:71)
	at org.exist.xquery.PathExpr.eval(PathExpr.java:280)
	at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:71)
	at org.exist.xquery.XQuery.execute(XQuery.java:445)
	at org.exist.xquery.XQuery.execute(XQuery.java:348)
	at org.exist.xquery.XQuery.execute(XQuery.java:335)
	at org.exist.http.RESTServer.search(RESTServer.java:1371)
	at org.exist.http.RESTServer.doGet(RESTServer.java:392)
	at org.exist.http.servlets.EXistServlet.doGet(EXistServlet.java:324)
	... 65 more