Buen día amigos en mi dspace 6.2 me muestra el siguiente mensaje "Error 
interno del sistema", he revisado el log y me muestra lo siguiente :
2021-05-28 10:30:38,927 INFO  org.dspace.browse.BrowseEngine @ 
anonymous:session_id=FC7B53D27B98C810F2EBAE7DC2B16AE1:ip_addr=141.212.123.195:browse_mini:
2021-05-28 10:30:38,931 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 3
2021-05-28 10:30:38,941 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 1
2021-05-28 10:30:40,662 INFO  org.dspace.browse.BrowseEngine @ 
anonymous:session_id=65FA4E747163AD36242F2F984E86279C:ip_addr=141.212.123.195:browse_mini:
2021-05-28 10:30:40,666 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 3
2021-05-28 10:30:40,676 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 1
2021-05-28 10:30:41,506 WARN  org.dspace.app.webui.servlet.DSpaceServlet @ 
anonymous:session_id=4A22006BB2E70C3D0AB03866F5BE0818:ip_addr=181.176.97.192:io_error:org.apache.catalina.connector.ClientAbortException\colon;
 
java.io.IOException\colon; Expiró el tiempo de conexión
2021-05-28 10:30:43,630 INFO  
org.dspace.app.webui.servlet.AbstractBrowserServlet @ 
anonymous:session_id=B6FEB56DAF724BA47AE4832CB35989D2:ip_addr=66.249.70.101:browse:type=subject,order=ASC,value=Agricultura,month=null,year=null,starts_with=L,vfocus=null,focus=-1,rpp=20,sort_by=1,community=n/a,collection=inia/20,level=1,etal=-1
2021-05-28 10:30:43,631 INFO  org.dspace.browse.BrowseEngine @ 
anonymous:session_id=B6FEB56DAF724BA47AE4832CB35989D2:ip_addr=66.249.70.101:browse_by_item:
2021-05-28 10:30:43,987 INFO  org.dspace.app.webui.servlet.HandleServlet @ 
anonymous:session_id=840547CECDF9F5F6C96501B27A3EA812:ip_addr=10.212.134.221:view_community:community_id=16288197-9abd-4191-a713-1d7dc7e2f53e
2021-05-28 10:30:43,989 INFO  org.dspace.browse.BrowseEngine @ 
anonymous:session_id=840547CECDF9F5F6C96501B27A3EA812:ip_addr=10.212.134.221:browse_mini:
2021-05-28 10:30:43,992 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, 
org.dspace.content.Community@ec642aba: 3
2021-05-28 10:30:44,004 INFO  org.dspace.usage.LoggerUsageEventListener @ 
anonymous:session_id=840547CECDF9F5F6C96501B27A3EA812:ip_addr=10.212.134.221:view_community:community_id=16288197-9abd-4191-a713-1d7dc7e2f53e
2021-05-28 10:30:44,066 WARN  org.dspace.app.webui.servlet.DSpaceServlet @ 
anonymous:session_id=4A22006BB2E70C3D0AB03866F5BE0818:ip_addr=181.176.97.192:io_error:org.apache.catalina.connector.ClientAbortException\colon;
 
java.io.IOException\colon; Expiró el tiempo de conexión
2021-05-28 10:30:44,760 INFO  org.dspace.app.webui.servlet.RetrieveServlet 
@ 
anonymous:session_id=840547CECDF9F5F6C96501B27A3EA812:ip_addr=10.212.134.221:view_bitstream:bitstream_id=bbc59ece-d4a5-44e4-91b8-88be5a05574f
2021-05-28 10:30:44,760 INFO  org.dspace.usage.LoggerUsageEventListener @ 
anonymous:session_id=840547CECDF9F5F6C96501B27A3EA812:ip_addr=10.212.134.221:view_bitstream:bitstream_id=bbc59ece-d4a5-44e4-91b8-88be5a05574f
2021-05-28 10:30:45,602 WARN  org.dspace.app.webui.servlet.DSpaceServlet @ 
anonymous:session_id=4A22006BB2E70C3D0AB03866F5BE0818:ip_addr=181.176.97.192:io_error:org.apache.catalina.connector.ClientAbortException\colon;
 
java.io.IOException\colon; Expiró el tiempo de conexión
2021-05-28 10:30:46,114 WARN  org.dspace.app.webui.servlet.DSpaceServlet @ 
anonymous:session_id=4A22006BB2E70C3D0AB03866F5BE0818:ip_addr=181.176.97.192:io_error:org.apache.catalina.connector.ClientAbortException\colon;
 
java.io.IOException\colon; Expiró el tiempo de conexión
2021-05-28 10:30:49,331 INFO  org.dspace.browse.BrowseEngine @ 
anonymous:session_id=483231BAD03C6ED931DC844932A8E346:ip_addr=141.212.123.195:browse_mini:
2021-05-28 10:30:49,337 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 3
2021-05-28 10:30:49,347 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 1
2021-05-28 10:30:50,350 INFO  org.dspace.app.webui.servlet.HandleServlet @ 
anonymous:session_id=840547CECDF9F5F6C96501B27A3EA812:ip_addr=10.212.134.221:view_collection:collection_id=ec4f3c65-788a-4443-b01e-33a998b32636
2021-05-28 10:30:50,351 INFO  org.dspace.browse.BrowseEngine @ 
anonymous:session_id=840547CECDF9F5F6C96501B27A3EA812:ip_addr=10.212.134.221:browse_by_item:
2021-05-28 10:30:50,362 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, 
org.dspace.content.Collection@bc68d3d1: 3
2021-05-28 10:30:50,372 INFO  org.dspace.usage.LoggerUsageEventListener @ 
anonymous:session_id=840547CECDF9F5F6C96501B27A3EA812:ip_addr=10.212.134.221:view_collection:collection_id=ec4f3c65-788a-4443-b01e-33a998b32636
2021-05-28 10:30:50,473 WARN  org.dspace.content.DCDate @ Mangled date: 
Diciembre - 2019  ..failed all attempts to parse as date.
2021-05-28 10:30:50,474 WARN  org.dspace.app.webui.servlet.DSpaceServlet @ 
anonymous:session_id=840547CECDF9F5F6C96501B27A3EA812:ip_addr=10.212.134.221:general_jspui_error:javax.servlet.ServletException\colon;
 
org.apache.jasper.JasperException\colon; java.lang.NullPointerException
javax.servlet.ServletException: org.apache.jasper.JasperException: 
java.lang.NullPointerException
at org.dspace.app.webui.util.JSPManager.showJSP(JSPManager.java:71)
at 
org.dspace.app.webui.servlet.HandleServlet.collectionHome(HandleServlet.java:773)
at 
org.dspace.app.webui.servlet.HandleServlet.doDSGet(HandleServlet.java:305)
at 
org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:126)
at org.dspace.app.webui.servlet.DSpaceServlet.doGet(DSpaceServlet.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at 
org.dspace.rdf.negotiation.NegotiationFilter.doFilter(NegotiationFilter.java:52)
at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at 
org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:78)
at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at 
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
at 
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
at 
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at 
java.util.concurrent.ThreadPoolExecutor$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)
Caused by: org.apache.jasper.JasperException: java.lang.NullPointerException
at 
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:555)
at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:401)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:345)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:720)
at 
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:466)
at 
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:391)
at 
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:318)
at org.dspace.app.webui.util.JSPManager.showJSP(JSPManager.java:64)
... 33 more
Caused by: java.lang.NullPointerException
2021-05-28 10:30:51,641 INFO  org.dspace.browse.BrowseEngine @ 
anonymous:session_id=2D085CADD290914AA63558F92DA72C63:ip_addr=141.212.123.195:browse_mini:
2021-05-28 10:30:51,645 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 3
2021-05-28 10:30:51,654 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 1
2021-05-28 10:30:54,048 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, 
org.dspace.content.Community@5a66dddf: 3
2021-05-28 10:30:54,062 INFO  
org.dspace.app.webui.discovery.DiscoverySearchRequestProcessor @ 
anonymous:session_id=4495571E6BBCF17541A39F892D3015BD:ip_addr=207.46.13.150:search:scope=org.dspace.content.Community@5a66dddf,query="null",results=(0,0,10)
2021-05-28 10:30:56,292 INFO  org.dspace.app.webui.servlet.HandleServlet @ 
anonymous:session_id=3F9FA13C682BE07FF9FAC5A3357D12F9:ip_addr=209.145.51.129:view_item:handle=inia/1121
2021-05-28 10:30:56,304 INFO  org.dspace.usage.LoggerUsageEventListener @ 
anonymous:session_id=3F9FA13C682BE07FF9FAC5A3357D12F9:ip_addr=209.145.51.129:view_item:handle=inia/1121
2021-05-28 10:30:58,011 INFO  org.dspace.app.webui.servlet.BitstreamServlet 
@ 
anonymous:session_id=BB77F5719F69DEF03065641794181809:ip_addr=157.55.39.171:view_bitstream:bitstream_id=b94db586-2e1b-4479-b3d7-ab6e11a38057
2021-05-28 10:30:58,012 INFO  org.dspace.usage.LoggerUsageEventListener @ 
anonymous:session_id=BB77F5719F69DEF03065641794181809:ip_addr=157.55.39.171:view_bitstream:bitstream_id=b94db586-2e1b-4479-b3d7-ab6e11a38057
2021-05-28 10:30:58,912 INFO  org.dspace.browse.BrowseEngine @ 
anonymous:session_id=379A470295C271E660289A5DA0D321F2:ip_addr=141.212.123.195:browse_mini:
2021-05-28 10:30:58,918 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 3
2021-05-28 10:30:58,930 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 1
2021-05-28 10:31:00,085 INFO  org.dspace.browse.BrowseEngine @ 
anonymous:session_id=EC1C15C617F7BDEDD954819598200DB3:ip_addr=141.212.123.195:browse_mini:
2021-05-28 10:31:00,089 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 3
2021-05-28 10:31:00,099 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 1
2021-05-28 10:31:01,708 INFO  
org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, 
org.dspace.content.Community@5a66dddf: 3
2021-05-28 10:31:01,722 INFO  
org.dspace.app.webui.discovery.DiscoverySearchRequestProcessor @ 
anonymous:session_id=8B9C9E00B0D7B1A8AE365B4560A0688E:ip_addr=185.191.171.38:search:scope=org.dspace.content.Community@5a66dddf,query="null",results=(0,0,1)
2021-05-28 10:31:03,323 INFO  org.dspace.app.webui.servlet.HandleServlet @ 
anonymous:session_id=49D74330536DFC491076CEABE3AA1A83:ip_addr=185.191.171.9:view_item:handle=inia/221
2021-05-28 10:31:03,344 INFO  org.dspace.usage.LoggerUsageEventListener @ 
anonymous:session_id=49D74330536DFC491076CEABE3AA1A83:ip_addr=185.191.171.9:view_item:handle=inia/221
2021-05-28 10:31:03,935 INFO  org.dspace.app.webui.servlet.BitstreamServlet 
@ 
anonymous:session_id=3F9FA13C682BE07FF9FAC5A3357D12F9:ip_addr=209.145.51.129:view_bitstream:bitstream_id=4647582c-7f29-4f86-a4c5-cc8b042a5a20
2021-05-28 10:31:03,935 INFO  org.dspace.usage.LoggerUsageEventListener @ 
anonymous:session_id=3F9FA13C682BE07FF9FAC5A3357D12F9:ip_addr=209.145.51.129:view_bitstream:bitstream_id=4647582c-7f29-4f86-a4c5-cc8b042a5a20
2021-05-28 10:31:04,609 INFO  org.dspace.app.webui.servlet.BitstreamServlet 
@ 
anonymous:session_id=3F9FA13C682BE07FF9FAC5A3357D12F9:ip_addr=209.145.51.129:view_bitstream:bitstream_id=4647582c-7f29-4f86-a4c5-cc8b042a5a20
2021-05-28 10:31:04,609 INFO  org.dspace.usage.LoggerUsageEventListener @ 
anonymous:session_id=3F9FA13C682BE07FF9FAC5A3357D12F9:ip_addr=209.145.51.129:view_bitstream:bitstream_id=4647582c-7f29-4f86-a4c5-cc8b042a5a20

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