HTTP Status 500 - rethrew: HttpException: 502 Bad Gateway


type Exception report

message rethrew: HttpException: 502 Bad Gateway

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

exception

HttpException: HttpException: 502 Bad Gateway: rethrew: HttpException: 502 Bad Gateway
	com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java:273)
	com.hp.hpl.jena.sparql.engine.http.HttpQuery.execGet(HttpQuery.java:167)
	com.hp.hpl.jena.sparql.engine.http.HttpQuery.exec(HttpQuery.java:128)
	com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execModel(QueryEngineHTTP.java:101)
	com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execDescribe(QueryEngineHTTP.java:95)
	com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execDescribe(QueryEngineHTTP.java:93)
	de.fuberlin.wiwiss.pubby.RemoteSPARQLDataSource.execDescribeQuery(RemoteSPARQLDataSource.java:74)
	de.fuberlin.wiwiss.pubby.RemoteSPARQLDataSource.getResourceDescription(RemoteSPARQLDataSource.java:52)
	de.fuberlin.wiwiss.pubby.servlets.BaseServlet.getResourceDescription(BaseServlet.java:66)
	de.fuberlin.wiwiss.pubby.servlets.PageURLServlet.doGet(PageURLServlet.java:36)
	de.fuberlin.wiwiss.pubby.servlets.BaseURLServlet.doGet(BaseURLServlet.java:33)
	de.fuberlin.wiwiss.pubby.servlets.BaseServlet.doGet(BaseServlet.java:94)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

root cause

HttpException: 502 Bad Gateway
	com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java:259)
	com.hp.hpl.jena.sparql.engine.http.HttpQuery.execGet(HttpQuery.java:167)
	com.hp.hpl.jena.sparql.engine.http.HttpQuery.exec(HttpQuery.java:128)
	com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execModel(QueryEngineHTTP.java:101)
	com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execDescribe(QueryEngineHTTP.java:95)
	com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execDescribe(QueryEngineHTTP.java:93)
	de.fuberlin.wiwiss.pubby.RemoteSPARQLDataSource.execDescribeQuery(RemoteSPARQLDataSource.java:74)
	de.fuberlin.wiwiss.pubby.RemoteSPARQLDataSource.getResourceDescription(RemoteSPARQLDataSource.java:52)
	de.fuberlin.wiwiss.pubby.servlets.BaseServlet.getResourceDescription(BaseServlet.java:66)
	de.fuberlin.wiwiss.pubby.servlets.PageURLServlet.doGet(PageURLServlet.java:36)
	de.fuberlin.wiwiss.pubby.servlets.BaseURLServlet.doGet(BaseURLServlet.java:33)
	de.fuberlin.wiwiss.pubby.servlets.BaseServlet.doGet(BaseServlet.java:94)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	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/7.0.68 (Ubuntu) logs.


Apache Tomcat/7.0.68 (Ubuntu)