Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/2963#discussion_r91532008
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/io/BarrierBuffer.java
---
@@ -422,7 +425,7 @@ private void beginNewAlignment(long checkpointId, int
channelIndex) throws IOExc
startOfAlignmentTimestamp = System.nanoTime();
if (LOG.isDebugEnabled()) {
- LOG.debug("Starting stream alignment for checkpoint " +
checkpointId);
+ LOG.debug("Starting stream alignment for checkpoint
{}.", checkpointId);
--- End diff --
I am not a super big fan of that change: Given that this is guarded by a
`LOG.isDebugEnabled()` the prior version was actually more efficient than the
new one. Saves a boxing operation and a parsing step.
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