Hi all - I'm getting the following exception:

org.janusgraph.core.JanusGraphException: Could not execute operation due to backend exception
        at org.janusgraph.diskstorage.util.BackendOperation.execute(BackendOperation.java:54)
        at org.janusgraph.diskstorage.BackendTransaction.executeRead(BackendTransaction.java:488)
        at org.janusgraph.diskstorage.BackendTransaction.edgeStoreQuery(BackendTransaction.java:271)
        at org.janusgraph.graphdb.database.StandardJanusGraph.edgeQuery(StandardJanusGraph.java:490)
        at org.janusgraph.graphdb.transaction.StandardJanusGraphTx$2.lambda$execute$1(StandardJanusGraphTx.java:1320)
        at org.janusgraph.graphdb.query.profile.QueryProfiler.profile(QueryProfiler.java:107)
        at org.janusgraph.graphdb.query.profile.QueryProfiler.profile(QueryProfiler.java:99)
        at org.janusgraph.graphdb.query.profile.QueryProfiler.profile(QueryProfiler.java:95)
        at org.janusgraph.graphdb.transaction.StandardJanusGraphTx$2.lambda$execute$2(StandardJanusGraphTx.java:1320)
        at org.janusgraph.graphdb.vertices.CacheVertex.loadRelations(CacheVertex.java:73)
        at org.janusgraph.graphdb.transaction.StandardJanusGraphTx$2.execute(StandardJanusGraphTx.java:1320)
        at org.janusgraph.graphdb.transaction.StandardJanusGraphTx$2.execute(StandardJanusGraphTx.java:1231)
        at org.janusgraph.graphdb.query.QueryProcessor$LimitAdjustingIterator.getNewIterator(QueryProcessor.java:206)
        at org.janusgraph.graphdb.query.LimitAdjustingIterator.hasNext(LimitAdjustingIterator.java:69)
        at org.janusgraph.graphdb.util.CloseableIteratorUtils$1.computeNext(CloseableIteratorUtils.java:49)
        at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:146)
        at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:141)
        at org.janusgraph.graphdb.query.ResultSetIterator.nextInternal(ResultSetIterator.java:55)
        at org.janusgraph.graphdb.query.ResultSetIterator.<init>(ResultSetIterator.java:45)
        at org.janusgraph.graphdb.query.QueryProcessor.iterator(QueryProcessor.java:68)
        at org.janusgraph.graphdb.query.QueryProcessor.iterator(QueryProcessor.java:49)
        at org.janusgraph.graphdb.vertices.AbstractVertex.edges(AbstractVertex.java:194)
        at com.comp.helios.heliosgraphcorrelationservice.threads.HandleCorrelationIDThread.handleCorrelationID(HandleCorrelationIDThread.java:145)
        at com.comp.helios.heliosgraphcorrelationservice.threads.HandleCorrelationIDThread.run(HandleCorrelationIDThread.java:68)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.janusgraph.diskstorage.PermanentBackendException: Permanent exception while executing backend operation EdgeStoreQuery
        at org.janusgraph.diskstorage.util.BackendOperation.executeDirect(BackendOperation.java:79)
        at org.janusgraph.diskstorage.util.BackendOperation.execute(BackendOperation.java:52)
        ... 26 more
Caused by: java.lang.OutOfMemoryError: Java heap space

The line of interest:

Iterator<Edge> edgeIt = correlationVertex.edges(Direction.IN);

That vertex (correlationVertex) may have a lot of OUT bound edges - maybe in the millions.  Does this try to load those into RAM? The number of INbound edges is small - maybe 5.
Ideas?

Thank you!

-Joe


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