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From "Paolo Castagna (Commented) (JIRA)" <>
Subject [jira] [Commented] (JENA-179) On Linux Fuseki will create user owned temporary files that block other users from using the full Fuseki Web UI
Date Fri, 16 Dec 2011 19:24:30 GMT


Paolo Castagna commented on JENA-179:

Hi Rob, I'd like to understand better the reason why you want to have multiple users run Fuseki
on the same machine.
Fuseki is a server, as a web server: you run it once on a machine and people will interact
with it via HTTP.
It is the normal behavior for a server to create files which belong to the user the server
was running with.
Are you running multiple instances of Fuseki listening on different ports on the same machine
using different users?
> On Linux Fuseki will create user owned temporary files that block other users from using
the full Fuseki Web UI
> ---------------------------------------------------------------------------------------------------------------
>                 Key: JENA-179
>                 URL:
>             Project: Jena
>          Issue Type: Bug
>          Components: Fuseki
>         Environment: SUSE Linux 11
>            Reporter: Rob Vesse
> Fuseki seems to create temporary files under Linux which are owned by the running user
and blocks any other users from running Fuseki properly because servlets will not function
> Going to the control panel will produce the following trace:
> Error 500: /tmp/org/apache/jsp/ (Permission denied)
> /tmp/org/apache/jsp/ (Permission
> 	at Method)
> 	at<init>(
> 	at<init>(
> 	at org.apache.jasper.compiler.JDTJavaCompiler.getJavaWriter(
> 	at org.apache.jasper.compiler.Compiler.generateJava(
> 	at org.apache.jasper.compiler.Compiler.compile(
> 	at org.apache.jasper.JspCompilationContext.compile(
> 	at org.apache.jasper.servlet.JspServletWrapper.service(
> 	at org.apache.jasper.servlet.JspServlet.serviceJspFile(
> 	at org.apache.jasper.servlet.JspServlet.service(
> 	at javax.servlet.http.HttpServlet.service(
> 	at org.eclipse.jetty.servlet.ServletHolder.handle(
> 	at org.eclipse.jetty.servlet.ServletHandler.doHandle(
> 	at org.eclipse.jetty.server.session.SessionHandler.doHandle(
> 	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(
> 	at org.eclipse.jetty.servlet.ServletHandler.doScope(
> 	at org.eclipse.jetty.server.session.SessionHandler.doScope(
> 	at org.eclipse.jetty.server.handler.ContextHandler.doScope(
> 	at org.eclipse.jetty.server.handler.ScopedHandler.handle(
> 	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(
> 	at org.eclipse.jetty.server.Server.handle(
> 	at org.eclipse.jetty.server.HttpConnection.handleRequest(
> 	at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(
> 	at org.eclipse.jetty.http.HttpParser.parseNext(
> 	at org.eclipse.jetty.http.HttpParser.parseAvailable(
> 	at org.eclipse.jetty.server.HttpConnection.handle(
> 	at org.eclipse.jetty.server.nio.BlockingChannelConnector$
> 	at org.eclipse.jetty.util.thread.QueuedThreadPool$
> 	at
> Fuseki - version 0.2.0 (Date: 2011-12-15T15:19:16-0800)
> It looks like these temporary files are being generated by one of the components Fuseki
relies upon rather than Fuseki itself but this is an issue for us because if one user has
run Fuseki another user may be completely blocked from using the web based UI fully.
> Interestingly servlets will still function correctly, e.g. I can still issue queries
directly to /dataset/query and get a response but the lack of a control panel is inconvenient.
> This may not be fixable due to it actually being caused by a component that Fuseki depends
upon but I have no expertise in Jetty/JSP/Servlets so I don't know against what project this
bug should actually be filed.

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