Fuseki integration seems broken since 3.0.0

[athalhammer]

Last working version for me is 2.2.1. After that I get the following when HDT tries to build the initial index of the datafile:

fuseki-hdt_1  | Exception in thread "main" java.lang.NoClassDefFoundError: pl/edu/icm/jlargearrays/LongLargeArray
fuseki-hdt_1  |     at org.rdfhdt.hdt.compact.sequence.SequenceLog64Big.<init>(SequenceLog64Big.java:78)
fuseki-hdt_1  |     at org.rdfhdt.hdt.compact.sequence.SequenceLog64Big.<init>(SequenceLog64Big.java:69)
fuseki-hdt_1  |     at org.rdfhdt.hdt.triples.impl.PredicateIndexArray.generate(PredicateIndexArray.java:71)
fuseki-hdt_1  |     at org.rdfhdt.hdt.triples.impl.BitmapTriples.generateIndex(BitmapTriples.java:658)
fuseki-hdt_1  |     at org.rdfhdt.hdt.hdt.impl.HDTImpl.loadOrCreateIndex(HDTImpl.java:538)
fuseki-hdt_1  |     at org.rdfhdt.hdt.hdt.HDTManagerImpl.doMapIndexedHDT(HDTManagerImpl.java:73)
fuseki-hdt_1  |     at org.rdfhdt.hdt.hdt.HDTManager.mapIndexedHDT(HDTManager.java:209)
fuseki-hdt_1  |     at org.rdfhdt.hdtjena.HDTGraphAssembler.open(HDTGraphAssembler.java:71)
fuseki-hdt_1  |     at org.rdfhdt.hdtjena.HDTGraphAssembler.open(HDTGraphAssembler.java:45)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.openBySpecificType(AssemblerGroup.java:157)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.open(AssemblerGroup.java:144)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.open(AssemblerGroup.java:93)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:39)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:35)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerGroup.openModel(AssemblerGroup.java:47)
fuseki-hdt_1  |     at org.apache.jena.sparql.core.assembler.DatasetAssemblerGeneral.createDataset(DatasetAssemblerGeneral.java:50)
fuseki-hdt_1  |     at org.apache.jena.sparql.core.assembler.DatasetAssembler.open(DatasetAssembler.java:40)
fuseki-hdt_1  |     at org.apache.jena.sparql.core.assembler.DatasetAssembler.open(DatasetAssembler.java:33)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.openBySpecificType(AssemblerGroup.java:157)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.open(AssemblerGroup.java:144)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.open(AssemblerGroup.java:93)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:39)
fuseki-hdt_1  |     at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:35)
fuseki-hdt_1  |     at org.apache.jena.fuseki.build.FusekiConfig.getDataset(FusekiConfig.java:667)
fuseki-hdt_1  |     at org.apache.jena.fuseki.build.FusekiConfig.buildDataService(FusekiConfig.java:430)
fuseki-hdt_1  |     at org.apache.jena.fuseki.build.FusekiConfig.buildDataAccessPoint(FusekiConfig.java:417)
fuseki-hdt_1  |     at org.apache.jena.fuseki.build.FusekiConfig.servicesAndDatasets$(FusekiConfig.java:322)
fuseki-hdt_1  |     at org.apache.jena.fuseki.build.FusekiConfig.servicesAndDatasets(FusekiConfig.java:293)
fuseki-hdt_1  |     at org.apache.jena.fuseki.build.FusekiConfig.processServerConfiguration(FusekiConfig.java:192)
fuseki-hdt_1  |     at org.apache.jena.fuseki.main.FusekiServer$Builder.parseConfig(FusekiServer.java:765)
fuseki-hdt_1  |     at org.apache.jena.fuseki.main.FusekiServer$Builder.parseConfigFile(FusekiServer.java:747)
fuseki-hdt_1  |     at org.apache.jena.fuseki.main.cmds.FusekiMain.buildServer(FusekiMain.java:536)
fuseki-hdt_1  |     at org.apache.jena.fuseki.main.cmds.FusekiMain.buildServer(FusekiMain.java:507)
fuseki-hdt_1  |     at org.apache.jena.fuseki.main.cmds.FusekiMain.exec(FusekiMain.java:472)
fuseki-hdt_1  |     at org.apache.jena.cmd.CmdMain.mainMethod(CmdMain.java:87)
fuseki-hdt_1  |     at org.apache.jena.cmd.CmdMain.mainRun(CmdMain.java:56)
fuseki-hdt_1  |     at org.apache.jena.cmd.CmdMain.mainRun(CmdMain.java:43)
fuseki-hdt_1  |     at org.apache.jena.fuseki.main.cmds.FusekiMain.run(FusekiMain.java:126)
fuseki-hdt_1  |     at org.apache.jena.fuseki.main.cmds.FusekiMainCmd.main(FusekiMainCmd.java:47)
fuseki-hdt_1  | Caused by: java.lang.ClassNotFoundException: pl.edu.icm.jlargearrays.LongLargeArray
fuseki-hdt_1  |     at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
fuseki-hdt_1  |     at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
fuseki-hdt_1  |     at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
fuseki-hdt_1  |     ... 39 more

[athalhammer]

At least the following page is outdated as you now also need to download the respective JLargeArrays package in the classpath:

https://www.rdfhdt.org/manual-of-hdt-integration-with-jena/

[mielvds]

Support for Fuseki has been removed since 2.2.0. There is preliminary work on fuseki 2, but that turned out to be much more work than expected

[athalhammer]

Thanks @mielvds! I saw that it has been removed as a "maintained folder" but I thought it should be possible to still get it run. In fact, I managed but I needed to extend the classpath from

java -cp "fuseki-server.jar:hdt-api.jar:hdt-java-core.jar:hdt-jena.jar"  org.apache.jena.fuseki.main.cmds.FusekiMainCmd

to

java -cp "fuseki-server.jar:hdt-api.jar:hdt-java-core.jar:hdt-jena.jar:jlargearrays.jar"  org.apache.jena.fuseki.main.cmds.FusekiMainCmd

So my conclusion was that probably since 3.0.0 the dependencies are not packaged into core any longer. If that's the case it may actually have further implications not relating to fuseki as such.

[D063520]

Related to #167