Github user hmcl commented on a diff in the pull request: https://github.com/apache/storm/pull/1924#discussion_r99640360 --- Diff: external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/KafkaSpout.java --- @@ -240,7 +240,9 @@ private boolean commit() { private boolean poll() { final int maxUncommittedOffsets = kafkaSpoutConfig.getMaxUncommittedOffsets(); - final boolean poll = !waitingToEmit() && numUncommittedOffsets < maxUncommittedOffsets; + final boolean poll = !waitingToEmit() && + (numUncommittedOffsets < maxUncommittedOffsets || + !retryService.retriableTopicPartitions().isEmpty()); --- End diff -- `!retryService.retriableTopicPartitions().isEmpty()` can't this condition cause unbounded polling (i.e. continue forever), if some specific tuples are always failing? The goal is to have a limit in how much can be polled (hence kept in memory) in case of recurring failures.
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