com.hp.hpl.jena.sparql.engine.http.QueryExceptionHTTP: File not found" My first thought was because CheckpointSyncMode=2, it blocks the query. But I managed to get this exception when CheckpointSyncMode=1. Unfortunately, I'm not able to copy more code than the method call; but I can reproduce it with any SPARQL query. ResponseResult resultsAndBindings = APIEndpointUtil.call(req, nb, match, contextPath, queryParams); Here is the stacktrace: HttpException: 404 File not found

  1. 0

    Why do I get `404 File not found` (through Jena) during Virtuoso checkpoint?

    Stack Overflow | 4 months ago | Balazs Varhegyi
    com.hp.hpl.jena.sparql.engine.http.QueryExceptionHTTP: File not found" My first thought was because CheckpointSyncMode=2, it blocks the query. But I managed to get this exception when CheckpointSyncMode=1. Unfortunately, I'm not able to copy more code than the method call; but I can reproduce it with any SPARQL query. ResponseResult resultsAndBindings = APIEndpointUtil.call(req, nb, match, contextPath, queryParams); Here is the stacktrace: HttpException: 404 File not found

    Root Cause Analysis

    1. com.hp.hpl.jena.sparql.engine.http.QueryExceptionHTTP

      File not found" My first thought was because CheckpointSyncMode=2, it blocks the query. But I managed to get this exception when CheckpointSyncMode=1. Unfortunately, I'm not able to copy more code than the method call; but I can reproduce it with any SPARQL query. ResponseResult resultsAndBindings = APIEndpointUtil.call(req, nb, match, contextPath, queryParams); Here is the stacktrace: HttpException: 404 File not found

      at com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon()
    2. Apache Jena - ARQ (SPARQL 1.1 Query Engine)
      QueryEngineHTTP.execSelect
      1. com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java:446)
      2. com.hp.hpl.jena.sparql.engine.http.HttpQuery.execPost(HttpQuery.java:344)
      3. com.hp.hpl.jena.sparql.engine.http.HttpQuery.exec(HttpQuery.java:239)
      4. com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execSelect(QueryEngineHTTP.java:302)
      4 frames
    3. com.epimorphics.lda
      APIEndpointUtil.call
      1. com.epimorphics.lda.sources.SourceBase.executeSelect(SourceBase.java:110)
      2. com.epimorphics.lda.query.APIQuery.requestTotalCount(APIQuery.java:917)
      3. com.epimorphics.lda.core.APIEndpointImpl.call_revised(APIEndpointImpl.java:112)
      4. com.epimorphics.lda.core.APIEndpointImpl.call(APIEndpointImpl.java:92)
      5. com.epimorphics.lda.core.APIEndpointUtil.call(APIEndpointUtil.java:53)
      5 frames