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Created March 19, 2013 18:43
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org.apache.jena.riot.RiotException: No graph writer for null
[2013-03-19 19:39:05] INFO Fuseki :: [1] GET http://localhost:3030/dataset/query?query=%0ADESCRIBE+%3Chttp%3A%2F%2Fexample.info%2Fid%2F1000%3E%0A&output=html
[2013-03-19 19:39:05] INFO Fuseki :: [1] Host localhost:3030
[2013-03-19 19:39:05] INFO Fuseki :: [1] Accept */*
[2013-03-19 19:39:05] INFO Fuseki :: [1] Query =
DESCRIBE <http://example.info/id/1000>
[2013-03-19 19:39:05] DEBUG TDB :: Txn[1]/R: begin$
[2013-03-19 19:39:05] DEBUG info :: Triple table: SPO :: SPO,POS,OSP
[2013-03-19 19:39:05] DEBUG info :: Quad table: GSPO :: GSPO,GPOS,GOSP,POSG,OSPG,SPOG
[2013-03-19 19:39:05] DEBUG info :: Prefixes: GPU :: GPU
[2013-03-19 19:39:05] DEBUG LockMRSW :: Lock : qtp1339714885-20
[2013-03-19 19:39:05] DEBUG TDB :: Txn[1]/R: start
[2013-03-19 19:39:05] DEBUG LockMRSW :: qtp1339714885-20 >> enterCS: Thread R/W: 0/0 :: Model R/W: 0/0 (thread: qtp1339714885-20)
[2013-03-19 19:39:05] DEBUG LockMRSW :: qtp1339714885-20 << enterCS: Thread R/W: 1/0 :: Model R/W: 1/0 (thread: qtp1339714885-20)
[2013-03-19 19:39:05] DEBUG LockMRSW :: Lock : qtp1339714885-20
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:05] DEBUG LockMRSW :: Lock : qtp1339714885-20
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:05] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:05] DEBUG BlockAccessMapped :: Segment: 0
[2013-03-19 19:39:06] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:06] TRACE BlockAccessMapped :: 0 => [0, 0]
[2013-03-19 19:39:06] INFO Fuseki :: [1] exec/describe
[2013-03-19 19:39:06] DEBUG ConNeg :: Accept request: */*
[2013-03-19 19:39:06] DEBUG ConNeg :: Content type chosen: [application/rdf+xml]
[2013-03-19 19:39:06] TRACE ResponseResultSet :: Content-Type for response: html; charset=utf-8
[2013-03-19 19:39:06] DEBUG TDB :: Txn[1]/R: finish
[2013-03-19 19:39:06] DEBUG LockMRSW :: qtp1339714885-20 >> leaveCS: Thread R/W: 1/0 :: Model R/W: 1/0 (thread: qtp1339714885-20)
[2013-03-19 19:39:06] DEBUG LockMRSW :: qtp1339714885-20 << leaveCS: Thread R/W: 0/0 :: Model R/W: 0/0 (thread: qtp1339714885-20)
org.apache.jena.riot.RiotException: No graph writer for null
at org.apache.jena.riot.RDFDataMgr.createGraphWriter$(RDFDataMgr.java:1106)
at org.apache.jena.riot.RDFDataMgr.write$(RDFDataMgr.java:1120)
at org.apache.jena.riot.RDFDataMgr.write(RDFDataMgr.java:899)
at org.apache.jena.riot.RDFDataMgr.write(RDFDataMgr.java:889)
at org.apache.jena.riot.RDFDataMgr.write(RDFDataMgr.java:836)
at org.apache.jena.fuseki.servlets.ResponseModel.doResponseModel(ResponseModel.java:119)
at org.apache.jena.fuseki.servlets.SPARQL_Query.sendResults(SPARQL_Query.java:349)
at org.apache.jena.fuseki.servlets.SPARQL_Query.execute(SPARQL_Query.java:255)
at org.apache.jena.fuseki.servlets.SPARQL_Query.executeWithParameter(SPARQL_Query.java:215)
at org.apache.jena.fuseki.servlets.SPARQL_Query.perform(SPARQL_Query.java:106)
at org.apache.jena.fuseki.servlets.SPARQL_ServletBase.doCommonWorker(SPARQL_ServletBase.java:117)
at org.apache.jena.fuseki.servlets.SPARQL_ServletBase.doCommon(SPARQL_ServletBase.java:67)
at org.apache.jena.fuseki.servlets.SPARQL_Query.doGet(SPARQL_Query.java:86)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:735)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:669)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1336)
at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:82)
at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:264)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1307)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:453)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:229)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1072)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:382)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1006)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:365)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:485)
at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:635)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
at org.eclipse.jetty.server.nio.BlockingChannelConnector$BlockingChannelEndPoint.run(BlockingChannelConnector.java:298)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:722)
[2013-03-19 19:39:06] INFO Fuseki :: [1] Content-Type html; charset=utf-8
[2013-03-19 19:39:06] INFO Fuseki :: [1] 500 Server Error
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