type Exception report
message Request processing failed; nested exception is java.util.ConcurrentModificationException
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.util.ConcurrentModificationException org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) javax.servlet.http.HttpServlet.service(HttpServlet.java:728) ORG.oclc.metrics.servlet.http.BasicStatMetricFilter.doFilter(BasicStatMetricFilter.java:90) org.oclc.access.filter.HttpHEADFilter.doFilter(HttpHEADFilter.java:36) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
root cause
java.util.ConcurrentModificationException org.apache.jena.mem.ArrayBunch$2.hasNext(ArrayBunch.java:118) org.apache.jena.mem.NodeToTriplesMapBase$1.hasNext(NodeToTriplesMapBase.java:133) org.apache.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90) org.apache.jena.atlas.iterator.Iter$2.hasNext(Iter.java:265) org.apache.jena.atlas.iterator.Iter$1.hasNext(Iter.java:192) org.apache.jena.atlas.iterator.Iter.hasNext(Iter.java:903) org.apache.jena.riot.writer.TurtleShell$ShellGraph.writeBySubject(TurtleShell.java:587) org.apache.jena.riot.writer.TurtleShell$ShellGraph.writeGraph(TurtleShell.java:478) org.apache.jena.riot.writer.TurtleShell$ShellGraph.access$100(TurtleShell.java:116) org.apache.jena.riot.writer.TurtleShell.writeGraphTTL(TurtleShell.java:102) org.apache.jena.riot.writer.TurtleWriter$TurtleWriter$.write(TurtleWriter.java:44) org.apache.jena.riot.writer.TurtleWriter$TurtleWriter$.access$000(TurtleWriter.java:34) org.apache.jena.riot.writer.TurtleWriter.output(TurtleWriter.java:31) org.apache.jena.riot.writer.TurtleWriterBase.output$(TurtleWriterBase.java:54) org.apache.jena.riot.writer.TurtleWriterBase.write(TurtleWriterBase.java:48) org.apache.jena.riot.adapters.RDFWriterRIOT.write(RDFWriterRIOT.java:91) org.oclc.access.view.MappingJenaRDFView.renderMergedOutputModel(MappingJenaRDFView.java:61) org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303) org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1228) org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1011) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:955) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) javax.servlet.http.HttpServlet.service(HttpServlet.java:728) ORG.oclc.metrics.servlet.http.BasicStatMetricFilter.doFilter(BasicStatMetricFilter.java:90) org.oclc.access.filter.HttpHEADFilter.doFilter(HttpHEADFilter.java:36) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
note The full stack trace of the root cause is available in the logs.