Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/896#discussion_r34270017
--- Diff:
flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/runtime/io/StreamingAbstractRecordReader.java
---
@@ -57,6 +58,12 @@
private final BarrierBuffer barrierBuffer;
+ /**
+ * Counters for the number of bytes read and records processed.
+ */
+ private LongCounter numRecordsRead = null;
--- End diff --
`null` initializations are actually redundant. They still get executed (for
OpenJDK javac and Oracle javac), so it is actually overhead for no reason.
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