# Describe Request : LongHashSet can't handle long element which equal to 0 **URL:** \ **Category:** Bug\ **Created:** [August 28, 2019, 9:24am UTC](https://community.stardog.com/t/describe-request-longhashset-cant-handle-long-element-which-equal-to-0/1856 "2019-08-28T09:24:09Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![witchBioinformatics](https://avatars.discourse-cdn.com/v4/letter/w/71e660/32.png) [@witchBioinformatics](https://community.stardog.com/u/witchBioinformatics)\ **Post date:** [August 28, 2019, 9:24am UTC](https://community.stardog.com/t/describe-request-longhashset-cant-handle-long-element-which-equal-to-0/1856/1 "2019-08-28T09:24:09Z")
For my project i've built an html/js page for show a graph with individual from my stardog database. A java server is between the html/js page and the stardog for write sparql request, execute them and then convert the result for the graph. I use pragma describe.strategy bidirectional for my requests. Example : DESCRIBE [http://medicis.univ-rennes1.fr/ontologies/ontospm/OntoMEDIRAD.owl#Patient\_f4df4492-4e04-42f2-a20f-a3208d4021cc](http://medicis.univ-rennes1.fr/ontologies/ontospm/OntoMEDIRAD.owl#Patient_f4df4492-4e04-42f2-a20f-a3208d4021cc) In some cases i have an error : org.openrdf.query.QueryEvaluationException: LongHashSet can't handle long element which equal to 0 The project and the code are here : [https://github.com/MediCIS/semanticTransaltor](https://github.com/MediCIS/semanticTransaltor) The datas used for test : [https://drive.google.com/file/d/10EHWVmaNmp13cCDmh\_Oms6zqwxOoT2lT/view?usp=sharing](https://drive.google.com/file/d/10EHWVmaNmp13cCDmh_Oms6zqwxOoT2lT/view?usp=sharing) The requests used are here : [https://docs.google.com/spreadsheets/d/1wuYIV8zQoYTCmX3v--XlimPsQWPo4vHi6JZZH91ckKc/edit?usp=sharing](https://docs.google.com/spreadsheets/d/1wuYIV8zQoYTCmX3v--XlimPsQWPo4vHi6JZZH91ckKc/edit?usp=sharing) (all of them have no errors when i use the stardog web admin page My stardog is stil Stardog 5.3.1 Thanks you The full error (from java logs) : > 208393 [http-nio-8090-exec-3] ERROR org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/].[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path threw exception [Request processing failed; nested exception is com.complexible.stardog.StardogException: LongHashSet can't handle long element which equal to 0] with root cause > org.openrdf.query.QueryEvaluationException: LongHashSet can't handle long element which equal to 0 > at com.complexible.stardog.protocols.http.client.BaseHttpClient.checkResponseCode(BaseHttpClient.java:491) > at com.complexible.stardog.protocols.http.client.BaseHttpClient.execute(BaseHttpClient.java:363) > at com.complexible.stardog.protocols.http.client.HttpClientImpl.graph(HttpClientImpl.java:292) > at com.complexible.stardog.protocols.http.client.HttpConnection.\_graph(HttpConnection.java:158) > at com.complexible.stardog.api.impl.AbstractConnection.executeGraph(AbstractConnection.java:450) > at com.complexible.stardog.api.impl.GraphQueryImpl.execute(GraphQueryImpl.java:33) > at com.complexible.stardog.api.impl.GraphQueryImpl.execute(GraphQueryImpl.java:23) > at repository.RequestBuilder.describeRequest(RequestBuilder.java:383) > at repository.RequestBuilder.testClicGraph(RequestBuilder.java:300) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) > at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209) > at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) > at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) > at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:870) > at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:776) > at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) > at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) > at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) > at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978) > at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) > at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ---
**Author:** ![pavel](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.stardog.com/pavel/32/18_2.png) [@pavel](https://community.stardog.com/u/pavel)\ **Post date:** [August 28, 2019, 9:27am UTC](https://community.stardog.com/t/describe-request-longhashset-cant-handle-long-element-which-equal-to-0/1856/2 "2019-08-28T09:27:37Z")
Thanks for the report. This is indeed a bug which we fixed in the 6.2.3 release. Are you able to upgrade to the latest Stardog? Best, Pavel ---
**Author:** ![witchBioinformatics](https://avatars.discourse-cdn.com/v4/letter/w/71e660/32.png) [@witchBioinformatics](https://community.stardog.com/u/witchBioinformatics)\ **Post date:** [August 28, 2019, 9:28am UTC](https://community.stardog.com/t/describe-request-longhashset-cant-handle-long-element-which-equal-to-0/1856/3 "2019-08-28T09:28:36Z")
I can do it for test but it will need to update all others peoples Thanks you