Re: [Bigdata-developers] Getting triples up to 3 hops from a given set of resources

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Hi,

Yet another update. I still get the exceptions. It doesn't seem to depend on the JVM.

The query works, but only if I load data, restart the server and then do the query. Then, after the first update, I start getting the exceptions. That's why it started working with curl after a restart of Tomcat with a different JVM. The moment I fired up my app, which started writing stuff to the store and doing queries - the exceptions reappeared.

Is it a bug? Do I need to do anything between loading data and doing GAS queries?

Best regards,

-- 
Antoni Myłka
Software Engineer

Quantinum AG, Birkenweg 61, CH-3013 Bern - Fon +41 31 388 20 40
http://www.quantinum.com - Bee for Business

----- Ursprüngliche Mail -----
Von: "Antoni Myłka" <ant...@qu...>
An: big...@li...
Gesendet: Montag, 18. August 2014 11:34:46
Betreff: Re: [Bigdata-developers] Getting triples up to 3 hops from a given set of resources

Hi,

The exception doesn't appear when I switch from JRE 8 to JRE 7. The query seems to work.

Best Regards,

-- 
Antoni Myłka
Software Engineer

Quantinum AG, Birkenweg 61, CH-3013 Bern - Fon +41 31 388 20 40
http://www.quantinum.com - Bee for Business

----- Ursprüngliche Mail -----
Von: "Antoni Myłka" <ant...@qu...>
An: big...@li...
Gesendet: Montag, 18. August 2014 10:37:17
Betreff: Re: [Bigdata-developers] Getting triples up to 3 hops from a given set of resources

Hi

I'm trying to experiment with the BFS program. The example "BFS with extracted subgraph" seems most interesting to me. I do this:

curl -X POST 'http://localhost:28080/bigdata/namespace/our.namespace/sparql' -o out.xml \
--data-urlencode 'query=PREFIX gas: <http://www.bigdata.com/rdf/gas#>
SELECT ?depth ?out ?p ?o 
WHERE {
    SERVICE gas:service {
     gas:program gas:gasClass "com.bigdata.rdf.graph.analytics.BFS" .
     gas:program gas:in <my-starting-point> . 
     gas:program gas:out ?out . 
     gas:program gas:out1 ?depth . 
     gas:program gas:maxIterations 1 . 
  }
  ?out ?p ?o .
}'    

But the out.xml file contains an exception where the root cause is (Full stack trace below):

Caused by: java.lang.ClassCastException: com.bigdata.journal.TemporaryStore cannot be cast to com.bigdata.journal.Journal
        at com.bigdata.rdf.store.LocalTripleStore.<init>(LocalTripleStore.java:163)
        ... 15 more

It seems like some configuration issue. Is there anything I must or can't put in the configuration files before I can use GAS? I also don't quite understand why there are two configuration files: RWStore.properties and GraphStore.properties. What is the relation between them? Is a "graph store" something separate from a normal RDF store? 

-- 
Antoni Myłka
Software Engineer

Quantinum AG, Birkenweg 61, CH-3013 Bern - Fon +41 31 388 20 40
http://www.quantinum.com - Bee for Business

PREFIX gas: <http://www.bigdata.com/rdf/gas#>
SELECT ?depth ?out ?p ?o
WHERE {
    SERVICE gas:service {
     gas:program gas:gasClass "com.bigdata.rdf.graph.analytics.BFS" .
     gas:program gas:in <my-starting-point> .
     gas:program gas:out ?out . 
     gas:program gas:out1 ?depth . 
     gas:program gas:out2 ?predecessor . 
     gas:program gas:maxIterations 1 . 
  }
  ?out ?p ?o . 
}
java.util.concurrent.ExecutionException: java.lang.Exception: org.openrdf.query.QueryEvaluationException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.Exception: task=ChunkTask{query=d4747392-722c-46ab-80e2-e9fb27dddd7c,bopId=1,partitionId=-1,sinkId=3,altSinkId=null}, cause=java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at java.util.concurrent.FutureTask.report(Unknown Source)
        at java.util.concurrent.FutureTask.get(Unknown Source)
        at com.bigdata.rdf.sail.webapp.QueryServlet.doQuery(QueryServlet.java:625)
        at com.bigdata.rdf.sail.webapp.QueryServlet.doPost(QueryServlet.java:182)
        at com.bigdata.rdf.sail.webapp.RESTServlet.doPost(RESTServlet.java:237)
        at com.bigdata.rdf.sail.webapp.MultiTenancyServlet.doPost(MultiTenancyServlet.java:135)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.Exception: org.openrdf.query.QueryEvaluationException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.Exception: task=ChunkTask{query=d4747392-722c-46ab-80e2-e9fb27dddd7c,bopId=1,partitionId=-1,sinkId=3,altSinkId=null}, cause=java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.call(BigdataRDFContext.java:1191)
        at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.call(BigdataRDFContext.java:500)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        ... 1 more
Caused by: org.openrdf.query.QueryEvaluationException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.Exception: task=ChunkTask{query=d4747392-722c-46ab-80e2-e9fb27dddd7c,bopId=1,partitionId=-1,sinkId=3,altSinkId=null}, cause=java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at com.bigdata.rdf.sail.Bigdata2Sesame2BindingSetIterator.hasNext(Bigdata2Sesame2BindingSetIterator.java:188)
        at org.openrdf.query.impl.TupleQueryResultImpl.hasNext(TupleQueryResultImpl.java:90)
        at org.openrdf.query.QueryResultUtil.report(QueryResultUtil.java:52)
        at org.openrdf.repository.sail.SailTupleQuery.evaluate(SailTupleQuery.java:63)
        at com.bigdata.rdf.sail.webapp.BigdataRDFContext$TupleQueryTask.doQuery(BigdataRDFContext.java:1310)
        at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.call(BigdataRDFContext.java:1164)
        ... 5 more
Caused by: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.Exception: task=ChunkTask{query=d4747392-722c-46ab-80e2-e9fb27dddd7c,bopId=1,partitionId=-1,sinkId=3,altSinkId=null}, cause=java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at com.bigdata.relation.accesspath.BlockingBuffer$BlockingIterator.checkFuture(BlockingBuffer.java:1523)
        at com.bigdata.relation.accesspath.BlockingBuffer$BlockingIterator._hasNext(BlockingBuffer.java:1710)
        at com.bigdata.relation.accesspath.BlockingBuffer$BlockingIterator.hasNext(BlockingBuffer.java:1563)
        at com.bigdata.striterator.AbstractChunkedResolverator._hasNext(AbstractChunkedResolverator.java:365)
        at com.bigdata.striterator.AbstractChunkedResolverator.hasNext(AbstractChunkedResolverator.java:341)
        at com.bigdata.rdf.sail.Bigdata2Sesame2BindingSetIterator.hasNext(Bigdata2Sesame2BindingSetIterator.java:134)
        ... 10 more
Caused by: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.Exception: task=ChunkTask{query=d4747392-722c-46ab-80e2-e9fb27dddd7c,bopId=1,partitionId=-1,sinkId=3,altSinkId=null}, cause=java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at java.util.concurrent.FutureTask.report(Unknown Source)
        at java.util.concurrent.FutureTask.get(Unknown Source)
        at com.bigdata.relation.accesspath.BlockingBuffer$BlockingIterator.checkFuture(BlockingBuffer.java:1454)
        ... 15 more
Caused by: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.Exception: task=ChunkTask{query=d4747392-722c-46ab-80e2-e9fb27dddd7c,bopId=1,partitionId=-1,sinkId=3,altSinkId=null}, cause=java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at com.bigdata.rdf.sail.RunningQueryCloseableIterator.checkFuture(RunningQueryCloseableIterator.java:59)
        at com.bigdata.rdf.sail.RunningQueryCloseableIterator.close(RunningQueryCloseableIterator.java:73)
        at com.bigdata.rdf.sail.RunningQueryCloseableIterator.hasNext(RunningQueryCloseableIterator.java:82)
        at com.bigdata.striterator.ChunkedWrappedIterator.hasNext(ChunkedWrappedIterator.java:197)
        at com.bigdata.striterator.AbstractChunkedResolverator$ChunkConsumerTask.call(AbstractChunkedResolverator.java:222)
        at com.bigdata.striterator.AbstractChunkedResolverator$ChunkConsumerTask.call(AbstractChunkedResolverator.java:197)
        ... 4 more
Caused by: java.util.concurrent.ExecutionException: java.lang.Exception: task=ChunkTask{query=d4747392-722c-46ab-80e2-e9fb27dddd7c,bopId=1,partitionId=-1,sinkId=3,altSinkId=null}, cause=java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at com.bigdata.util.concurrent.Haltable.get(Haltable.java:273)
        at com.bigdata.bop.engine.AbstractRunningQuery.get(AbstractRunningQuery.java:1477)
        at com.bigdata.bop.engine.AbstractRunningQuery.get(AbstractRunningQuery.java:104)
        at com.bigdata.rdf.sail.RunningQueryCloseableIterator.checkFuture(RunningQueryCloseableIterator.java:46)
        ... 9 more
Caused by: java.lang.Exception: task=ChunkTask{query=d4747392-722c-46ab-80e2-e9fb27dddd7c,bopId=1,partitionId=-1,sinkId=3,altSinkId=null}, cause=java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at com.bigdata.bop.engine.ChunkedRunningQuery$ChunkTask.call(ChunkedRunningQuery.java:1335)
        at com.bigdata.bop.engine.ChunkedRunningQuery$ChunkTaskWrapper.run(ChunkedRunningQuery.java:894)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at com.bigdata.concurrent.FutureTaskMon.run(FutureTaskMon.java:63)
        at com.bigdata.bop.engine.ChunkedRunningQuery$ChunkFutureTask.run(ChunkedRunningQuery.java:789)
        ... 3 more
Caused by: java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at java.util.concurrent.FutureTask.report(Unknown Source)
        at java.util.concurrent.FutureTask.get(Unknown Source)
        at com.bigdata.bop.engine.ChunkedRunningQuery$ChunkTask.call(ChunkedRunningQuery.java:1315)
        ... 8 more
Caused by: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at java.util.concurrent.FutureTask.report(Unknown Source)
        at java.util.concurrent.FutureTask.get(Unknown Source)
        at com.bigdata.bop.controller.ServiceCallJoin$ChunkTask.doServiceCallWithConstant(ServiceCallJoin.java:341)
        at com.bigdata.bop.controller.ServiceCallJoin$ChunkTask.call(ServiceCallJoin.java:293)
        at com.bigdata.bop.controller.ServiceCallJoin$ChunkTask.call(ServiceCallJoin.java:205)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at com.bigdata.bop.engine.ChunkedRunningQuery$ChunkTask.call(ChunkedRunningQuery.java:1314)
        ... 8 more
Caused by: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at com.bigdata.bop.controller.ServiceCallJoin$ChunkTask$ServiceCallTask.doServiceCall(ServiceCallJoin.java:743)
        at com.bigdata.bop.controller.ServiceCallJoin$ChunkTask$ServiceCallTask.call(ServiceCallJoin.java:606)
        at com.bigdata.bop.controller.ServiceCallJoin$ChunkTask$ServiceCallTask.call(ServiceCallJoin.java:542)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        ... 3 more
Caused by: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at java.util.concurrent.FutureTask.report(Unknown Source)
        at java.util.concurrent.FutureTask.get(Unknown Source)
        at com.bigdata.rdf.graph.impl.GASEngine$ParallelFrontierStrategy.call(GASEngine.java:329)
        at com.bigdata.rdf.graph.impl.GASEngine$ParallelFrontierStrategy.call(GASEngine.java:236)
        at com.bigdata.rdf.graph.impl.GASContext.scatterEdges(GASContext.java:604)
        at com.bigdata.rdf.graph.impl.GASContext.doRound(GASContext.java:391)
        at com.bigdata.rdf.graph.impl.GASContext.call(GASContext.java:240)
        at com.bigdata.rdf.graph.impl.bd.GASService$GASServiceCall.call(GASService.java:837)
        at com.bigdata.rdf.graph.impl.bd.GASService$GASServiceCall.call(GASService.java:414)
        at com.bigdata.bop.controller.ServiceCallJoin$ChunkTask$ServiceCallTask.doBigdataServiceCall(ServiceCallJoin.java:756)
        at com.bigdata.bop.controller.ServiceCallJoin$ChunkTask$ServiceCallTask.doServiceCall(ServiceCallJoin.java:697)
        ... 6 more
Caused by: java.lang.RuntimeException: Could not instantiate relation: java.lang.reflect.InvocationTargetException
        at com.bigdata.relation.locator.DefaultResourceLocator.newInstance(DefaultResourceLocator.java:982)
        at com.bigdata.relation.locator.DefaultResourceLocator.cacheMiss(DefaultResourceLocator.java:464)
        at com.bigdata.relation.locator.DefaultResourceLocator.locate(DefaultResourceLocator.java:333)
        at com.bigdata.rdf.graph.impl.bd.BigdataGASEngine$BigdataGraphAccessor.resolveKB(BigdataGASEngine.java:301)
        at com.bigdata.rdf.graph.impl.bd.BigdataGASEngine$BigdataGraphAccessor.getKB(BigdataGASEngine.java:272)
        at com.bigdata.rdf.graph.impl.bd.BigdataGASEngine$BigdataGraphAccessor.getEdges(BigdataGASEngine.java:687)
        at com.bigdata.rdf.graph.impl.GASContext$ScatterTask.call(GASContext.java:744)
        at com.bigdata.rdf.graph.impl.GASContext$ScatterTask.call(GASContext.java:700)
        ... 4 more
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.GeneratedConstructorAccessor27.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at com.bigdata.relation.locator.DefaultResourceLocator.newInstance(DefaultResourceLocator.java:963)
        ... 11 more
Caused by: java.lang.ClassCastException: com.bigdata.journal.TemporaryStore cannot be cast to com.bigdata.journal.Journal
        at com.bigdata.rdf.store.LocalTripleStore.<init>(LocalTripleStore.java:163)
        ... 15 more

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Re: [Bigdata-developers] Getting triples up to 3 hops from a given set of resources

Fast, scalable, robust graph database platform

Re: [Bigdata-developers] Getting triples up to 3 hops from a given set of resources