Kristian Kristian - 4 years ago 155
Java Question

Fuseki GC overhead limit exceeded during data import

I'm trying to import LinkedMDB (6.1m triples) into my local version of jena-fuseki at startup:

/path/to/fuseki-server --file=/path/to/linkedmdb.nt /ds


and that runs for a minute, then dies with the following error:

Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded
at com.hp.hpl.jena.graph.Node$3.construct(Node.java:318)
at com.hp.hpl.jena.graph.Node.create(Node.java:344)
at com.hp.hpl.jena.graph.NodeFactory.createURI(NodeFactory.java:48)
at org.apache.jena.riot.system.RiotLib.createIRIorBNode(RiotLib.java:80)
at org.apache.jena.riot.system.ParserProfileBase.createURI(ParserProfileBase.java:107)
at org.apache.jena.riot.system.ParserProfileBase.create(ParserProfileBase.java:156)
at org.apache.jena.riot.lang.LangNTriples.tokenAsNode(LangNTriples.java:97)
at org.apache.jena.riot.lang.LangNTriples.parseOne(LangNTriples.java:90)
at org.apache.jena.riot.lang.LangNTriples.runParser(LangNTriples.java:54)
at org.apache.jena.riot.lang.LangBase.parse(LangBase.java:42)
at org.apache.jena.riot.RDFParserRegistry$ReaderRIOTFactoryImpl$1.read(RDFParserRegistry.java:142)
at org.apache.jena.riot.RDFDataMgr.process(RDFDataMgr.java:818)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:679)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:211)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:104)
at org.apache.jena.fuseki.FusekiCmd.processModulesAndArgs(FusekiCmd.java:251)
at arq.cmdline.CmdArgModule.process(CmdArgModule.java:51)
at arq.cmdline.CmdMain.mainMethod(CmdMain.java:100)
at arq.cmdline.CmdMain.mainRun(CmdMain.java:63)
at arq.cmdline.CmdMain.mainRun(CmdMain.java:50)
at org.apache.jena.fuseki.FusekiCmd.main(FusekiCmd.java:141)


Is there a way that I can bump up the memory limit or import the data in less intensive way?

For comparison's sake, when I used a 1million triple source file, it imports in less than 10 seconds.

Answer Source

Increase heap memory, java -Xmx2048M -jar fuseki-sys.jar ......

open fuseki-server with an editor you'll find the line JVM_ARGS=${JVM_ARGS:--Xmx1200M} modify it to JVM_ARGS=${JVM_ARGS:--Xmx2048M}

Recommended from our users: Dynamic Network Monitoring from WhatsUp Gold from IPSwitch. Free Download