You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@jena.apache.org by "Dmitry Zhelobanov (Jira)" <ji...@apache.org> on 2022/02/19 20:04:00 UTC
[jira] [Comment Edited] (JENA-2285) Java Heap error when there is an optional in service block
[ https://issues.apache.org/jira/browse/JENA-2285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17495041#comment-17495041 ]
Dmitry Zhelobanov edited comment on JENA-2285 at 2/19/22, 8:03 PM:
-------------------------------------------------------------------
Is there a way to force ARQ to send this query to the federated API:
{code:java}
SELECT * { OPTIONAL { <http://www.wikidata.org/entity/Q15757> wdt:P856 ?website.}{code}
?
We want to limit amount of data queried from the remote site, and the query to the remote is based on the data we queried from local site.
was (Author: JIRAUSER285435):
Is there a way to force ARQ to send this query to the federated API:
{code:java}
SELECT * { OPTIONAL { <http://www.wikidata.org/entity/Q15757> wdt:P856 ?website.}{code}
?
I.e. we usually want to limit amount of data queried from the remote site, and the query to the remote is based on the data we queried from local side.
> Java Heap error when there is an optional in service block
> ----------------------------------------------------------
>
> Key: JENA-2285
> URL: https://issues.apache.org/jira/browse/JENA-2285
> Project: Apache Jena
> Issue Type: Bug
> Affects Versions: Jena 4.4.0
> Reporter: Dmitry Zhelobanov
> Priority: Major
>
> Here is the query:
> {code:java}
> PREFIX owl: <http://www.w3.org/2002/07/owl#>
> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
> PREFIX wdt: <http://www.wikidata.org/prop/direct/>
> PREFIX p: <http://www.wikidata.org/prop/>
> PREFIX pq: <http://www.wikidata.org/prop/qualifier/>
> PREFIX ps: <http://www.wikidata.org/prop/statement/>
> PREFIX psv: <http://www.wikidata.org/prop/statement/value/>
> PREFIX wikibase: <http://wikiba.se/ontology#>
> SELECT ?wikidata_city_iri ?website
> WHERE {
> BIND(IRI("http://www.wikidata.org/entity/Q15757") as ?id)
> BIND(IRI(?id) AS ?wikidata_city_iri) .
> SERVICE <https://query.wikidata.org/sparql> {
> #Querying website
> OPTIONAL {
> ?wikidata_city_iri wdt:P856 ?website.
> } .
> }.
> } {code}
> When the query is executed I get"Java Heap Error" after, as I guess, Java runs out of memory in the pool. The trace of the error is below.
> When OPTIONAL is commented out, then I get "no data" as expected.
> {code:java}
> 09:16:08 INFO Fuseki :: [5] POST http://127.0.0.1:3030/WattTour/sparql
> 09:16:08 INFO Fuseki :: [5] Query = PREFIX owl: <http://www.w3.org/2002/07/owl#> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX wdt: <http://www.wikidata.org/prop/direct/> PREFIX p: <http://www.wikidata.org/prop/> PREFIX pq: <http://www.wikidata.org/prop/qualifier/> PREFIX ps: <http://www.wikidata.org/prop/statement/> PREFIX psv: <http://www.wikidata.org/prop/statement/value/> PREFIX wikibase: <http://wikiba.se/ontology#> SELECT ?wikidata_city_iri ?website WHERE { BIND(IRI("http://www.wikidata.org/entity/Q15757") as ?id) BIND(IRI(?id) AS ?wikidata_city_iri) . SERVICE <https://query.wikidata.org/sparql> { #Querying website OPTIONAL { ?wikidata_city_iri wdt:P856 ?website. } . }. }
> 09:18:43 WARN HttpChannel :: /$/ping
> javax.servlet.ServletException: Filtered request failed.
> at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:384) ~[fuseki-server.jar:4.4.0]
> at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1594) ~[fuseki-server.jar:4.4.0]
> at org.apache.jena.fuseki.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:284) ~[fuseki-server.jar:4.4.0]
> at org.apache.jena.fuseki.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:247) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:210) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1594) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:506) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:578) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1571) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1378) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:463) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1544) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1300) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:711) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.Server.handle(Server.java:562) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.HttpChannel.lambda$handle$0(HttpChannel.java:418) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:675) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:410) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:282) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:319) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.io.SocketChannelEndPoint$1.run(SocketChannelEndPoint.java:101) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:412) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:381) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:268) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.lambda$new$0(AdaptiveExecutionStrategy.java:138) ~[fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:407) [fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:894) [fuseki-server.jar:4.4.0]
> at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1038) [fuseki-server.jar:4.4.0]
> at java.lang.Thread.run(Thread.java:829) [?:?]
> Caused by: java.lang.OutOfMemoryError: Java heap space
> 09:18:43 WARN Fuseki :: [5] RC = 500 : Java heap space
> java.lang.OutOfMemoryError: Java heap space
> 09:18:43 INFO Fuseki :: [5] 500 Server Error (154,663 s){code}
>
--
This message was sent by Atlassian Jira
(v8.20.1#820001)