[jboss-jira] [JBoss JIRA] (DROOLS-1711) Jitting process may randomly fail during multithreaded execution
Mario Fusco created DROOLS-1711:
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Summary: Jitting process may randomly fail during multithreaded execution
Key: DROOLS-1711
URL: https://issues.jboss.org/browse/DROOLS-1711
Project: Drools
Issue Type: Bug
Components: core engine
Reporter: Mario Fusco
Assignee: Mario Fusco
The jitting process assumes that the mvel constraint has been evaluated at least once
before it kicks in. This may not be the case during a multithreaded execution (especially
when running with many threads and a very low jitting threshold) because the jitting
process may start when other threads have already requested the constraint evaluation
using the mvel interpreted constraint (thus incrementing the jitting counter) but none of
them had enough time to complete it. When this happens the jitting process trying to work
on an uncompleted AST throwing internally an exception like the following:
{code}
Exception in thread "drools-worker-1" java.lang.RuntimeException:
java.lang.RuntimeException: Null accessor on node: firings
at
org.drools.core.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:346)
at org.drools.core.rule.constraint.MvelConstraint.access$200(MvelConstraint.java:82)
at
org.drools.core.rule.constraint.MvelConstraint$ConditionJitter.run(MvelConstraint.java:313)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.RuntimeException: Null accessor on node: firings
at
org.drools.core.rule.constraint.ConditionAnalyzer.analyzeNode(ConditionAnalyzer.java:302)
at
org.drools.core.rule.constraint.ConditionAnalyzer.analyzeSingleCondition(ConditionAnalyzer.java:159)
at
org.drools.core.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:138)
at
org.drools.core.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:109)
at
org.drools.core.rule.constraint.MvelConditionEvaluator.getAnalyzedCondition(MvelConditionEvaluator.java:129)
at
org.drools.core.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:333)
... 5 more
{code}
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