When RDFRules runs out of memory, worker threads are not terminated

[kliegr]

When RDFRules runs out of memory (GC overhead limited exceeded), worker threads are not terminated and the load of all CPU cores remains at 100%.

020-09-16 11:34:59:780 +0200 [Thread-33] INFO task-3ba84b09-de58-4f40-bb60-3d41f2e4062a - Action Amie rules mining, steps: 16664 (0.06 per sec) -- processed rules, found closed rules: 25535936, queue size: 25577603, stage: 2, activeThreads: 6 Exception in thread "Thread-40" java.lang.OutOfMemoryError: GC overhead limit exceeded at com.github.propi.rdfrules.algorithm.amie.RuleFilter$RulePatternFilter$$Lambda$1452/1315182476.get$Lambda(Unknown Source) at java.lang.invoke.LambdaForm$DMH/1023714065.invokeStatic_LL_L(LambdaForm$DMH) at java.lang.invoke.LambdaForm$MH/1802598046.linkToTargetMethod(LambdaForm$MH) at com.github.propi.rdfrules.algorithm.amie.RuleFilter$RulePatternFilter.matchAtom(RuleFilter.scala:83) at com.github.propi.rdfrules.algorithm.amie.RuleFilter$RulePatternFilter.apply(RuleFilter.scala:95) at com.github.propi.rdfrules.algorithm.amie.RuleFilter$And.apply(RuleFilter.scala:42) at com.github.propi.rdfrules.algorithm.amie.RuleRefinement.$anonfun$refine$13(RuleRefinement.scala:203) at com.github.propi.rdfrules.algorithm.amie.RuleRefinement$$Lambda$1592/1828223227.apply(Unknown Source) at scala.collection.Iterator$$anon$10.next(Iterator.scala:448) at scala.collection.Iterator$$anon$12.hasNext(Iterator.scala:501) at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:447) at scala.collection.Iterator.foreach(Iterator.scala:929) at scala.collection.Iterator.foreach$(Iterator.scala:929) at scala.collection.AbstractIterator.foreach(Iterator.scala:1417) at com.github.propi.rdfrules.algorithm.amie.Amie$AmieProcess$$anon$1.$anonfun$run$11(Amie.scala:209) at com.github.propi.rdfrules.algorithm.amie.Amie$AmieProcess$$anon$1.$anonfun$run$11$adapted(Amie.scala:202) at com.github.propi.rdfrules.algorithm.amie.Amie$AmieProcess$$anon$1$$Lambda$1422/153380730.apply(Unknown Source) at scala.collection.Iterator.foreach(Iterator.scala:929) at scala.collection.Iterator.foreach$(Iterator.scala:929) at scala.collection.AbstractIterator.foreach(Iterator.scala:1417) at com.github.propi.rdfrules.algorithm.amie.Amie$AmieProcess$$anon$1.run(Amie.scala:202) at java.lang.Thread.run(Thread.java:748) 2020-09-16 11:35:34:200 +0200 [Thread-33] INFO task-3ba84b09-de58-4f40-bb60-3d41f2e4062a - Action Amie rules mining, steps: 16665 (0.04 per sec) -- processed rules, found closed rules: 25538702, queue size: 25580374, stage: 2, activeThreads: 6 2020-09-16 11:36:24:157 +0200 [Thread-33] INFO task-3ba84b09-de58-4f40-bb60-3d41f2e4062a - Action Amie rules mining, steps: 16666 (0.06 per sec) -- processed rules, found closed rules: 25544096, queue size: 25585771, stage: 2, activeThreads: 6 Exception in thread "Thread-44" java.lang.OutOfMemoryError: GC overhead limit exceeded 2020-09-16 11:37:33:113 +0200 [Thread-33] INFO task-3ba84b09-de58-4f40-bb60-3d41f2e4062a - Action Amie rules mining, steps: 16667 (0.06 per sec) -- processed rules, found closed rules: 25546573, queue size: 25588249, stage: 2, activeThreads: 6 Exception in thread "Thread-43" java.lang.OutOfMemoryError: GC overhead limit exceeded 2020-09-16 11:38:00:114 +0200 [Thread-33] INFO task-3ba84b09-de58-4f40-bb60-3d41f2e4062a - Action Amie rules mining, steps: 16668 (0.06 per sec) -- processed rules, found closed rules: 25547331, queue size: 25589007, stage: 2, activeThreads: 6 Exception in thread "Thread-41" java.lang.OutOfMemoryError: GC overhead limit exceeded Exception in thread "Thread-45" java.lang.OutOfMemoryError: GC overhead limit exceeded Exception in thread "Thread-33" java.lang.OutOfMemoryError: GC overhead limit exceeded Exception in thread "Thread-53" java.lang.OutOfMemoryError: GC overhead limit exceeded Exception in thread "Thread-68" java.lang.OutOfMemoryError: GC overhead limit exceeded Uncaught error from thread [rdfrules-http-scheduler-1]: GC overhead limit ex