Drools can't find rules under stress

In my knowledge base, I have many rules.
All of them are working very well in production with drools 6.0.1-FINAL even in stress condition hight trafic (arount 40 hits seconds)

This bug append when we made an upgrade with drools 6.3.0-FINAL which is compatible with jdk8 mandatory in my case.

So now when I put my rules under stress test (benchmarking) I got this random error.
Drools is unable to find a query (not always the same one).
I got this error for 0,6% of my requests.

+Following the stack trace : +
Unable to find query 'checkAndBindBasket'
at org.drools.core.phreak.SegmentUtilities.getQueryLiaNode(SegmentUtilities.java:518) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.phreak.SegmentUtilities.getQuerySegmentMemory(SegmentUtilities.java:208) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.SegmentMemory$QueryMemoryPrototype.populateMemory(SegmentMemory.java:505) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.SegmentMemory$Prototype.newSegmentMemory(SegmentMemory.java:400) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.impl.KnowledgeBaseImpl.createSegmentFromPrototype(KnowledgeBaseImpl.java:1424) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.phreak.SegmentUtilities.restoreSegmentFromPrototype(SegmentUtilities.java:186) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.phreak.SegmentUtilities.createSegmentMemory(SegmentUtilities.java:83) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:167) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:60) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:60) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:145) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:494) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:384) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.reteoo.ObjectTypeNode.propagateAssert(ObjectTypeNode.java:298) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.phreak.PropagationEntry$Insert.execute(PropagationEntry.java:93) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:96) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:69) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.impl.StatefulKnowledgeSessionImpl.flushPropagations(StatefulKnowledgeSessionImpl.java:1993) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1289) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1294) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1281) ~[darty-pricing-ws-2.0.2.jar:2.0.2]
at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1260) ~[darty-pricing-ws-2.0.2.jar:2.0.2]