shpark commented on a change in pull request #91: [NEMO-3] Bump up the Beam
version to 2.5.0
URL: https://github.com/apache/incubator-nemo/pull/91#discussion_r208204396
##########
File path:
runtime/executor/src/main/java/edu/snu/nemo/runtime/executor/data/partitioner/HashPartitioner.java
##########
@@ -40,6 +40,11 @@ public HashPartitioner(final int dstParallelism,
@Override
public Integer partition(final Object element) {
- return Math.abs(keyExtractor.extractKey(element).hashCode() %
dstParallelism);
+ final Object key = keyExtractor.extractKey(element);
+ if (key == null) {
Review comment:
Beam WriteFiles produces KV.of(null, something), during the sink. I will
change BeamKeyExtractor to return 0 for null key pairs.
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