Hi, As another workaround, I was thinking that I could actually generate locally the DBpedia index with all the data using the dumps ( http://wiki.dbpedia.org/Downloads36), in a way similar to the dbpedia_43k.
What do you think? Thanks, David On Wed, Jul 13, 2011 at 12:11 PM, Rupert Westenthaler < [email protected]> wrote: > Hi > > I will try to find some time in the evening to reproduce this. > > On Wed, Jul 13, 2011 at 8:57 AM, David Riccitelli > <[email protected]> wrote: > > Thanks Rupert, > > > > I'm trying to follow your instructions but I encounter a couple of issues > > (probably due to inexperience): > > [1] when dropping the config files, they enter some loop of > > REGISTERING/UNREGISTERING (which I solve by stopping the FileInstall > > bundle), is that normal? > > This is very strange and should not be caused by the FileInstaller. > Maybe there is some loop between the Sling Installer - trying to > install the default configuration and the FileInstaller that may cause > this under some circumstances. > > > [2] after I restart Stanbol, and try to query an entity from the > entityhub > > I receive the following error: > > > > 13.07.2011 09:54:17.939 *WARN* [509017110@qtp-1586831707-0] > > org.apache.felix.http.jetty /entityhub/sites/entity/ > > (java.lang.IllegalStateException: Unable to initialize the Cache with > Yard > > dbpediaCache! This is usually caused by Errors while reading the Cache > > Configuration from the Yard.) java.lang.IllegalStateException: Unable to > > initialize the Cache with Yard dbpediaCache! This is usually caused by > > Errors while reading the Cache Configuration from the Yard. > > at > > > org.apache.stanbol.entityhub.core.site.CacheImpl.getCacheYard(CacheImpl.java:214) > > > > > > Do I need to initialize the Cache in some way? > > > No it does not. Prepared in Indexes do include a document that > provides a list of the indexed fields. In future this may be used to > determine if a query can be successfully executed on the local index > or not. In addition this is used in case an Entity within the index is > updated with an newer version. > However this configuration is optional and is not required. This > Exception should only appear if the document is present but illegal > formatted. However the SolrYard initialized for the dbpediaCache > should be empty. > > Therefore I think it is somehow related to the above problem of > overriding configurations. > > In general the way how the default configuration is loaded is > sub-optional in the moment. Especially using a single defaultdata > bundle for both the OpenNLP models and the dbpedia configuration + > default index was not a good Idea, because one can not exclude/change > the dbpedia stuff without affecting other components that depend on > OpenNLP. > Therefore I think we need to discuss how to better structure the > configurations and data needed to run stanbol. > > There is also an other issue that the SolrYard only once copies > provided indexes and does not check for updates. This would it make > hard the upgrade from the small index provided with the default data > to a bigger version. > > Both this things are related to the problems and need to be addressed > before the first stanbol release. Independent of those I will try to > find a simple solution for what you intend to do. > > In the meantime I suggest you go for the initially proposed workaround. > > best > Rupert Westenthaler > > > Thanks for your help, > > > > David > > > > > > On Mon, Jul 11, 2011 at 11:42 PM, Rupert Westenthaler < > > [email protected]> wrote: > > > >> Hi > >> > >> On Mon, Jul 11, 2011 at 8:17 PM, Andrea Giovanni Nuzzolese > >> <[email protected]> wrote: > >> > I solved in the same way, but loosing the caching capabilities. > >> > Is there any possibility to keep both all the data and the cache? > >> > > >> > Andrea > >> > > >> > On Jul 11, 2011, at 4:08 PM, David Riccitelli wrote: > >> > > >> >> Ok, stopping the solrYard dbpedia_43k component solved for me. > >> >> > >> >> Thanks, > >> >> David > >> >> > >> >> On Mon, Jul 11, 2011 at 4:13 PM, David Riccitelli < > >> >> [email protected]> wrote: > >> >> > >> >>> Hi Rupert, > >> >>> > >> >>> I recently updated the Stanbol install, and I found that the RDF > >> returned > >> >>> by the EntityHub is missing some props (specifically the dbprop as > far > >> as I > >> >>> can see). > >> >>> > >> >>> This is the command that I use for testing: > >> >>> curl -H "accept: application/rdf+xml" " > >> >>> > >> > http://localhost:8080/entityhub/site/dbpedia/entity?id=http://dbpedia.org/resource/Valentino_Rossi > >> >>> " > >> >>> > >> >>> which outputs the attached RDF file. > >> >>> > >> >>> I cleared all of the sling folder (rm -fr sling) and checked the > with > >> the > >> >>> SPAQL end-point at DBpedia, but I wasn't able to fix it. > >> >>> > >> >>> Does this depend on the mapping.txt file? > >> >>> > >> > >> If you plan to create your own dbpedia index, than the mapping.txt > >> file would be the way how to configure what properties are > >> includes/excluded. > >> Typically dbprop values are low quality. They are just naive 1:1 > >> mappings of key value pairs as found in the info boxes. Because of > >> this they are excluded from the indexes. > >> > >> At runtime the returned data depend on the used Cache strategy: > >> > >> Currently there are three possibilities (configured with the referenced > >> Site) > >> 1) no cache: bot queries and retrieval so use a remote service > >> 2) used: Queries are executed by the remote service. Retrieved > >> Entities are stored locally. The cached data depend on the mappings > >> defined for the cache. > >> 3) all: Both queries and retrieval are based on the cache. The remote > >> service are only used as fallback in the case that the cache is not > >> available (e.g. if you deactivate solrYard). > >> > >> So if you you are fine with (2) than you could use the configuration > >> as previously used by the stable launcher [1]. > >> I think the easiest way to install this is to use this is to add the > >> Felix File Installer [2] to the Stanbol Environment. You will need to > >> delete the current referencedSite for dbpedia first and than add the > >> three configuration files as described by [1]. > >> > >> If your requirements are not covered by the currently available option > >> it would be nice if you could write a short user story, because I am > >> thinking about how to improve this feature and input like that would > >> be really valuable. > >> > >> best > >> Rupert Westenthaler > >> > >> [1] The dbpedia config consists of three files. the referenced site, > >> cache and solryard components with the "-dbpedia" endings. > >> > >> > http://svn.apache.org/viewvc/incubator/stanbol/trunk/launchers/stable/src/main/resources/resources/config/?pathrev=1140181 > >> > >> [2] http://felix.apache.org/site/apache-felix-file-install.html > >> > >> p.s. I keep this part because it describes very well how the cache > >> strategy "used" work: > >> >>>>> Hi David > >> >>>>> > >> >>>>> Assuming that you are using the default distribution of Apache > >> Stanbol. > >> >>>>> > >> >>>>> Requests for http://dbpedia.org/resource/Valentino_Rossi will be > >> >>>>> - only the first time answered by retrieving the Entity form > >> DBpedia.org > >> >>>>> - the Information are cached in a local cache. By that values of > the > >> >>>>> documents are filtered (see (a) for details) > >> >>>>> - the cached version is returned > >> >>>>> > >> >>>>> (a) The default configuration for dbpedia stores all fields > however > >> >>>>> filters values for literals so that only values with the language > >> "en, > >> >>>>> de, fr, it, es" or no language are stored. > >> >>>>> > >> >>>>> > >> >>>>> Assuming that you have started for zero when updating to a new > >> version > >> >>>>> this also means that you have downloaded a new version of this > Entity > >> >>>>> from dbPedia. > >> >>>>> > >> > >> -- > >> | Rupert Westenthaler [email protected] > >> | Bodenlehenstraße 11 ++43-699-11108907 > >> | A-5500 Bischofshofen > >> > > > > > > > > -- > > David Riccitelli > > > > Interact SpA > > Via A. Bargoni 78 (scala F) > > 00153 Roma > > > > T +39 06 58318 301 > > F +39 06 58318 303 > > > > > > -- > | Rupert Westenthaler [email protected] > | Bodenlehenstraße 11 ++43-699-11108907 > | A-5500 Bischofshofen > -- David Riccitelli Interact SpA Via A. Bargoni 78 (scala F) 00153 Roma T +39 06 58318 301 F +39 06 58318 303
