mcvsubbu commented on a change in pull request #4954: Support schema evolution
for consuming segments
URL: https://github.com/apache/incubator-pinot/pull/4954#discussion_r387396450
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/indexsegment/mutable/MutableSegmentImpl.java
##########
@@ -125,6 +128,9 @@
private volatile long _latestIngestionTimeMs = Long.MIN_VALUE;
private RealtimeLuceneReaders _realtimeLuceneReaders;
+ // If the table schema is changed before the consuming segment is committed,
newly added columns would appear in _newlyAddedColumnsFieldMap.
+ private volatile Map<String, FieldSpec> _newlyAddedColumnsFieldMap = new
ConcurrentHashMap();
Review comment:
```suggestion
private final Map<String, FieldSpec> _newlyAddedColumnsFieldMap = new
ConcurrentHashMap();
```
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