On 10.4.2018 19:37, Gustavo Tonini wrote:
Hello Tim,
thanks for your reply. The URL I mentioned before shows the Java stack trace and Java full stack trace. I'm copying it below.



Hello,

if I read the code correctly, the NullPointerException seems to occur while retrieving the handle of the parent DSpace object (i.e. the collection that 123456789/77186 is supposed to be in) before generating the Browse->This Collection links.

Perhaps there is some problem in the database - either with connecting the collection to item, or with the handle of the parent collection.

https://github.com/DSpace/DSpace/blob/dspace-6_x/dspace-xmlui/src/main/java/org/dspace/app/xmlui/aspect/browseArtifacts/Navigation.java#L152

java.lang.NullPointerException
        at 
org.dspace.app.xmlui.aspect.browseArtifacts.Navigation.addOptions(Navigation.java:152)
        at 
org.dspace.app.xmlui.wing.AbstractWingTransformer.startElement(AbstractWingTransformer.java:239)
        at sun.reflect.GeneratedMethodAccessor462.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy255.startElement(Unknown Source)
        at 
org.apache.cocoon.environment.internal.EnvironmentChanger.startElement(EnvironmentStack.java:140)
        at 
org.apache.cocoon.components.sax.XMLTeePipe.startElement(XMLTeePipe.java:87)
        at 
org.apache.cocoon.xml.AbstractXMLPipe.startElement(AbstractXMLPipe.java:94)
        at 
org.dspace.app.xmlui.wing.AbstractWingTransformer.startElement(AbstractWingTransformer.java:251)
        at sun.reflect.GeneratedMethodAccessor462.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy255.startElement(Unknown Source)
        at 
org.apache.cocoon.xml.AbstractXMLPipe.startElement(AbstractXMLPipe.java:94)
        at 
org.dspace.app.xmlui.wing.AbstractWingTransformer.startElement(AbstractWingTransformer.java:251)
        at sun.reflect.GeneratedMethodAccessor462.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy255.startElement(Unknown Source)
        at 
org.apache.cocoon.environment.internal.EnvironmentChanger.startElement(EnvironmentStack.java:140)
        at 
org.apache.cocoon.components.sax.XMLTeePipe.startElement(XMLTeePipe.java:87)
        at 
org.apache.cocoon.components.sax.AbstractXMLByteStreamInterpreter.parse(AbstractXMLByteStreamInterpreter.java:117)
        at 
org.apache.cocoon.components.sax.XMLByteStreamInterpreter.deserialize(XMLByteStreamInterpreter.java:44)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:324)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:326)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:326)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:326)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:544)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:273)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:544)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:273)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:544)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:273)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:544)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:273)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:544)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:273)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:544)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:273)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:544)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:273)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:750)
        at sun.reflect.GeneratedMethodAccessor490.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.source.impl.SitemapSource.toSAX(SitemapSource.java:362)
        at 
org.apache.cocoon.components.source.util.SourceUtil.toSAX(SourceUtil.java:111)
        at 
org.apache.cocoon.components.source.util.SourceUtil.parse(SourceUtil.java:294)
        at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:136)
        at sun.reflect.GeneratedMethodAccessor489.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy243.generate(Unknown Source)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:544)
        at 
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:273)
        at 
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:439)
        at sun.reflect.GeneratedMethodAccessor206.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at com.sun.proxy.$Proxy242.process(Unknown Source)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(SerializeNode.java:147)
        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:55)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:87)
        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:78)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:78)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:81)
        at 
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:239)
        at 
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:171)
        at 
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:247)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:117)
        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:55)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:87)
        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:78)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:78)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:81)
        at 
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:239)
        at 
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:171)
        at 
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:247)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:117)
        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:78)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:78)
        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:81)
        at 
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:239)
        at 
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:171)
        at 
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:247)
        at 
org.apache.cocoon.servlet.RequestProcessor.process(RequestProcessor.java:351)
        at 
org.apache.cocoon.servlet.RequestProcessor.service(RequestProcessor.java:169)
        at 
org.apache.cocoon.sitemap.SitemapServlet.service(SitemapServlet.java:84)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
        at 
org.apache.cocoon.servletservice.ServletServiceContext$PathDispatcher.forward(ServletServiceContext.java:468)
        at 
org.apache.cocoon.servletservice.ServletServiceContext$PathDispatcher.forward(ServletServiceContext.java:443)
        at 
org.apache.cocoon.servletservice.spring.ServletFactoryBean$ServiceInterceptor.invoke(ServletFactoryBean.java:264)
        at 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at 
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
        at com.sun.proxy.$Proxy231.service(Unknown Source)
        at org.dspace.springmvc.CocoonView.render(CocoonView.java:113)
        at 
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1216)
        at 
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1001)
        at 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
        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.doGet(FrameworkServlet.java:842)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
        at 
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:827)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at 
org.dspace.app.xmlui.cocoon.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:113)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at 
org.dspace.app.xmlui.cocoon.DSpaceCocoonServletFilter.doFilter(DSpaceCocoonServletFilter.java:160)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at 
org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceMultipartFilter.doFilter(DSpaceMultipartFilter.java:119)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at 
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at 
org.dspace.rdf.negotiation.NegotiationFilter.doFilter(NegotiationFilter.java:52)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at 
org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:78)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:221)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
        at 
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
        at 
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
        at 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)


On Tuesday, April 10, 2018 at 10:54:52 AM UTC-3, Tim Donohue wrote:

    Hi Gustavo,

    A NullPointerException in Java is a generic error that could have
    many different causes. So, we'd need more information about where
    this error is occurring. If you need help finding the error stack
    in your logs, please see this guide:

    https://wiki.duraspace.org/display/DSPACE/Troubleshoot+an+error
    <https://wiki.duraspace.org/display/DSPACE/Troubleshoot+an+error>

    Please be sure to post the error stack to this mailing list, and
    hopefully someone on this list will be able to more easily help you.

    Tim

    On Mon, Apr 9, 2018 at 2:27 PM Gustavo Tonini <gustav...@gmail.com
    <javascript:>> wrote:

        After upgrading to DSpace 6.2, we're receiving
        java.lang.NUllPointerException when visualizing some items
        (example:
        https://repositorio.ufsc.br/xmlui/handle/123456789/77186
        <https://repositorio.ufsc.br/xmlui/handle/123456789/77186>).
        The problem occurs both in JSPUI and XMLUI.

        We had some problems with items that didn't have the
        "dc.date.issued" attribute set, but it is not this case.

        Is someone experiencing similar issues?
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-- Tim Donohue
    Technical Lead for DSpace & DSpaceDirect
    DuraSpace.org | DSpace.org | DSpaceDirect.org

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Best regards,

--
Miika Nurminen

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