lucene search? what is it good for?

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lucene search? what is it good for?

Unread postby Matt Zornig » 20 Feb 2017, 16:28

Code: Select all
=========================================================================================
VERSION: MADSONIC 6.2 | BUILD: 9080.619dd31.20161222.0327
REST: MADSONIC REST API v2.5.0, SUBSONIC REST API v1.14.0
OS: Linux 3.10.77 #8451 SMP Wed Jan 4 00:31:32 CST 2017 x86_64 GNU/Linux
SERVER: jetty/8.y.z-SNAPSHOT, java 1.8.0_121, Linux 3.10.77 (amd64) (330.8 MB / 457.0 MB)
HOST: Synology NAS 1815+ (DSM 6.0.2-8451 Update 9) | CPU: INTEL Atom C2538| ARCH: X64 | MEMORY: 6GB | HDD: 36TB, RAID6
BROWSER: FF 51.x
CLIENT: see browser
JAVA: ORACLE JDK 1.8.121
DESCRIPTION: LAST.FM SCROBBLES DON'T STICK
REPRODUCIBLE: Quite often
logged in as admin
=========================================================================================



I had this quite a few times in the log in the last days, so I wanted to ask what that "lucene search" is good for?
serverlog-lucene.png
server log entry for lucene search


I only found that topic



Serverlog:
Code: Select all
ERROR SearchService - Failed to execute Lucene search.
java.lang.NullPointerException
   at org.madsonic.service.SearchService.search(SearchService.java:227)
   at org.madsonic.controller.SearchController.onSubmit(SearchController.java:94)
   at org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmission(SimpleFormController.java:272)
   at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:268)
   at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
   at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
   at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:933)
   at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
   at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:951)
   at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:853)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:755)
   at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:827)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
   at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
   at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1507)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
   at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
   at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:146)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
   at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
   at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
   at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
   at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
   at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
   at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1495)
   at org.madsonic.filter.RequestEncodingFilter.doFilter(RequestEncodingFilter.java:43)
   at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1495)
   at org.madsonic.filter.ParameterDecodingFilter.doFilter(ParameterDecodingFilter.java:54)
   at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1495)
   at org.madsonic.filter.BootstrapVerificationFilter.doFilter(BootstrapVerificationFilter.java:58)
   at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1487)
   at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)
   at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
   at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
   at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
   at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
   at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:427)
   at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
   at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
   at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
   at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
   at org.eclipse.jetty.server.Server.handle(Server.java:370)
   at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
   at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:984)
   at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1045)
   at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861)
   at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:236)
   at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
   at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
   at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
   at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
   at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
   at java.lang.Thread.run(Thread.java:745)
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Re: lucene search? what is it good for?

Unread postby Matt Zornig » 20 Feb 2017, 18:19

I got an answer regarding the subject: "The Lucene Search Index is used to build more complex search queries, without it Madsonic doesn't work as expected."
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