Github user dawidwys commented on a diff in the pull request: https://github.com/apache/flink/pull/4145#discussion_r122985049 --- Diff: flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/operator/AbstractKeyedCEPPatternOperator.java --- @@ -126,6 +129,7 @@ public AbstractKeyedCEPPatternOperator( this.isProcessingTime = Preconditions.checkNotNull(isProcessingTime); this.keySerializer = Preconditions.checkNotNull(keySerializer); this.nfaFactory = Preconditions.checkNotNull(nfaFactory); + this.conditionRegistry = nfaFactory.createNFA().getConditionRegistry(); --- End diff -- Maybe let's access conditionRegistry through nfaFactory rather than NFA itselfs? Anyway I think we should think of removing one layer in the `NFACompiler.java`, but I will create a seperate JIRA for this.
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