Github user jaxbihani commented on a diff in the pull request: https://github.com/apache/flink/pull/2568#discussion_r81199485 --- Diff: flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/operator/AbstractCEPPatternOperator.java --- @@ -126,11 +126,12 @@ public void restoreState(FSDataInputStream state) throws Exception { int numberPriorityQueueEntries = ois.readInt(); - priorityQueue = new PriorityQueue<StreamRecord<IN>>(numberPriorityQueueEntries, new StreamRecordComparator<IN>()); - - for (int i = 0; i <numberPriorityQueueEntries; i++) { - StreamElement streamElement = streamRecordSerializer.deserialize(new DataInputViewStreamWrapper(ois)); - priorityQueue.offer(streamElement.<IN>asRecord()); + if(numberPriorityQueueEntries > 0) { + priorityQueue = new PriorityQueue<StreamRecord<IN>>(numberPriorityQueueEntries, new StreamRecordComparator<IN>()); --- End diff -- I think if number of objects read are 0 then why would we want to create object at all? Thats unnecessary and condition check will save some CPU cycles.
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