LogicalDOC spams FileNotFoundException in the logs

[hgschwibbe]

I am using Community Edition 8.7.3 on Windows Server 2019 and I my log is spammed with a bunch of FileNotFoundExceptions.

The documents behind of that are a couple of LibreOffice documents that have no previews available.
Regardless of the fact that some image converters are not working, such FileNotFoundExceptions should never happen.

I would expect a default thumbnail if the image converter did not work.

java.io.FileNotFoundException: I:\logicaldoc\documents\docs\122\doc\1.0-thumb.png (Das System kann die angegebene Datei nicht finden)
     at java.base/java.io.FileInputStream.open0(Native Method)
     at java.base/java.io.FileInputStream.open(FileInputStream.java:216)
     at java.base/java.io.FileInputStream.<init>(FileInputStream.java:157)
     at com.logicaldoc.core.store.FSStorer.getStream(FSStorer.java:116)
     at com.logicaldoc.core.store.AbstractStorer.writeToStream(AbstractStorer.java:157)
     at com.logicaldoc.web.util.ServletUtil.downloadDocument(ServletUtil.java:362)
     at com.logicaldoc.web.ThumbnailServlet.doGet(ThumbnailServlet.java:109)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
     at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
     at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at com.logicaldoc.core.security.spring.AnonymousLoginFilter.doFilter(AnonymousLoginFilter.java:76)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at com.logicaldoc.core.security.spring.SessionIdFilter.doFilter(SessionIdFilter.java:53)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66)
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
     at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
     at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
     at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
     at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347)
     at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
     at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:164)
     at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:141)
     at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:90)
     at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:417)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:643)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
     at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
     at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
     at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
     at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)
     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1591)
     at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
     at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
     at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
     at java.base/java.lang.Thread.run(Thread.java:833)