Re: [rules-users] java.lang.ClassCastException: org.drools.reteoo.BetaMemory cannot be cast to org.drools.reteoo.AlphaNode$AlphaMemory

Looking at org.drools.common.ConcurrentNodeMemories: What happens if the rulebase is changed during invocation of resize? If I understand it well then every node in the rulebase has "slot" in this class? Can number of nodes in rulebase change while the copying for-cycle is running? Can in such case BetaMemory end up in place where AlphaMemory was before? (causing the ClassCastException later). private void resize( NodeMemory node ) { try { this.lock.lock(); if( node.getId() >= this.memories.length() ) { // adding some buffer for new nodes, so that we reduce array copies int size = Math.max( this.rulebase.getNodeCount(), node.getId() + 32 ); AtomicReferenceArray<Memory> newMem = new AtomicReferenceArray<Memory>( size ); for ( int i = 0; i < this.memories.length(); i++ ) { newMem.set( i, this.memories.get( i ) ); } this.memories = newMem; } } finally { this.lock.unlock(); } } And BTW: this.lock.lock() should be outside of the try block. -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-ClassCastException-org-drools... Sent from the Drools: User forum mailing list archive at Nabble.com.