Hi Sorin, you might want to try semantic_forms, another SPARQL server based on Jena TDB. This one is developed in Scala, on top of PlayFramework, itself on top of Netty 4.0.41.Final . Semantic_forms is also a generic semantic web navigation and annotation application, and a framework to build business applications centered on forms (input forms or read only).
A pre-release is here : https://github.com/jmvanel/semantic_forms/releases/tag/2.5.0 You can test the zip, and/or the sites: http://semantic-forms.cc:9112 : general site http://semantic-forms.cc:9111 : sandbox *NOTES:* - *currently , a Jena assembly file is not taken in account, but I can add that quickly if you ask* - *instead, a single TDB directory , named "TDB" is taken in account* 2018-04-26 13:55 GMT+02:00 Sorin Gheorghiu <[email protected]> : > Hi, > > Let's suppose Fuseki 3.6.0 is started as a service (and specific plugins > like reindex, percolator, mustache, netty3 & 4 are loaded). Then a script > which reads intensively data over SPARQL fails after the first ~400 > SELECT's with connection refused error (Net::HTTP::Persistent::Error). It > seems due to too many client connections in use fuseki is not capable to > open new ones. > > If the log4j is set to DEBUG (instead INFO or WARN) the script won't > crash, but fuseki will generate a huge amount of debug data which produces > a process delay which helps it to close the old connections. Of course, > this is not a reliable workaround on a production server. > > Alternatively, if fuseki is started as a Webapp (for the same assembler > file), then the same script runs (more than 80000 SELECT's within 1 hour) > without failure. In conclusion, fuseki as a Web Application handles better > the client connections. > > Regards, > Sorin > > > -- Jean-Marc Vanel http://www.semantic-forms.cc:9111/display?displayuri=http://jmvanel.free.fr/jmv.rdf%23me#subject <http://www.semantic-forms.cc:9111/display?displayuri=http://jmvanel.free.fr/jmv.rdf%23me> Déductions SARL - Consulting, services, training, Rule-based programming, Semantic Web +33 (0)6 89 16 29 52 Twitter: @jmvanel , @jmvanel_fr ; chat: irc://irc.freenode.net#eulergui
