Github user arunmahadevan commented on a diff in the pull request:
https://github.com/apache/storm/pull/2147#discussion_r119409717
--- Diff:
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/KafkaSpout.java
---
@@ -252,14 +289,16 @@ private boolean commit() {
private boolean poll() {
final int maxUncommittedOffsets =
kafkaSpoutConfig.getMaxUncommittedOffsets();
final int readyMessageCount = retryService.readyMessageCount();
- final boolean poll = !waitingToEmit() &&
- //Check that the number of uncommitted, nonretriable tuples is
less than the maxUncommittedOffsets limit
- //Accounting for retriable tuples this way still guarantees
that the limit is followed on a per partition basis, and prevents locking up
the spout when there are too many retriable tuples
- (numUncommittedOffsets - readyMessageCount <
maxUncommittedOffsets ||
- consumerAutoCommitMode);
+ final boolean poll = !isWaitingToEmit() &&
+ /*
+ * Check that the number of uncommitted, non-retriable
tuples is less than the maxUncommittedOffsets limit
+ * Accounting for retriable tuples this way still guarantees
that the limit is followed on a per partition basis,
+ * and prevents locking up the spout when there are too many
retriable tuples
+ */
+ (numUncommittedOffsets - readyMessageCount <
maxUncommittedOffsets || consumerAutoCommitMode);
--- End diff --
Add clarifying parenthesis
```java
if (((numUncommittedOffsets - readyMessageCount) < maxUncommittedOffsets)
|| consumerAutoCommitMode)
```
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