OAI record showing issues

[vinod awasare]

dear sir,

           I am using OAI 2.0 in dspace 6.3. After showing 100 items it gives error as follows. So how to fix this problem.

HTTP Status 500 - com.lyncode.xoai.dataprovider.exceptions.WritingXmlException: Error trying to output ''

type Exception report

message com.lyncode.xoai.dataprovider.exceptions.WritingXmlException: Error trying to output ''

description The server encountered an internal error that prevented it from fulfilling this request.

exception

java.io.IOException: com.lyncode.xoai.dataprovider.exceptions.WritingXmlException: Error trying to output ''
	org.dspace.xoai.services.impl.cache.DSpaceXOAICacheService.store(DSpaceXOAICacheService.java:113)
	org.dspace.xoai.controller.DSpaceOAIDataProvider.contextAction(DSpaceOAIDataProvider.java:104)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	java.lang.reflect.Method.invoke(Unknown Source)
	org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:743)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:672)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:82)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:933)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:951)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:827)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

root cause

com.lyncode.xoai.dataprovider.exceptions.WritingXmlException: Error trying to output ''
	com.lyncode.xoai.dataprovider.xml.EchoElement.write(EchoElement.java:58)
	com.lyncode.xoai.dataprovider.xml.oaipmh.MetadataType.write(MetadataType.java:78)
	com.lyncode.xoai.dataprovider.xml.oaipmh.RecordType.write(RecordType.java:130)
	com.lyncode.xoai.dataprovider.xml.oaipmh.ListRecordsType.write(ListRecordsType.java:110)
	com.lyncode.xoai.util.XmlIOUtils.writeElement(XmlIOUtils.java:20)
	com.lyncode.xoai.dataprovider.xml.oaipmh.OAIPMHtype.write(OAIPMHtype.java:286)
	com.lyncode.xoai.dataprovider.xml.oaipmh.OAIPMH.write(OAIPMH.java:44)
	org.dspace.xoai.services.impl.cache.DSpaceXOAICacheService.store(DSpaceXOAICacheService.java:97)
	org.dspace.xoai.controller.DSpaceOAIDataProvider.contextAction(DSpaceOAIDataProvider.java:104)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	java.lang.reflect.Method.invoke(Unknown Source)
	org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:743)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:672)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:82)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:933)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:951)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:827)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

root cause

com.ctc.wstx.exc.WstxEOFException: Unexpected EOF in prolog
 at [row,col {unknown-source}]: [1,0]
	com.ctc.wstx.sr.StreamScanner.throwUnexpectedEOF(StreamScanner.java:677)
	com.ctc.wstx.sr.BasicStreamReader.handleEOF(BasicStreamReader.java:2116)
	com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:2022)
	com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1114)
	org.codehaus.stax2.ri.Stax2EventReaderImpl.nextEvent(Stax2EventReaderImpl.java:255)
	com.lyncode.xoai.dataprovider.xml.EchoElement.write(EchoElement.java:31)
	com.lyncode.xoai.dataprovider.xml.oaipmh.MetadataType.write(MetadataType.java:78)
	com.lyncode.xoai.dataprovider.xml.oaipmh.RecordType.write(RecordType.java:130)
	com.lyncode.xoai.dataprovider.xml.oaipmh.ListRecordsType.write(ListRecordsType.java:110)
	com.lyncode.xoai.util.XmlIOUtils.writeElement(XmlIOUtils.java:20)
	com.lyncode.xoai.dataprovider.xml.oaipmh.OAIPMHtype.write(OAIPMHtype.java:286)
	com.lyncode.xoai.dataprovider.xml.oaipmh.OAIPMH.write(OAIPMH.java:44)
	org.dspace.xoai.services.impl.cache.DSpaceXOAICacheService.store(DSpaceXOAICacheService.java:97)
	org.dspace.xoai.controller.DSpaceOAIDataProvider.contextAction(DSpaceOAIDataProvider.java:104)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	java.lang.reflect.Method.invoke(Unknown Source)
	org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:743)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:672)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:82)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:933)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:951)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:827)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

note The full stack trace of the root cause is available in the Apache Tomcat/8.5.5 logs.

--

Regards,

Vinod Kumar

DESIDOC, DRDO

Min of Defence

Metcalfe House

Delhi-110054

011-23902451