aishikbh commented on code in PR #12220:
URL: https://github.com/apache/pinot/pull/12220#discussion_r1444810618
##########
pinot-core/src/main/java/org/apache/pinot/core/segment/processing/mapper/SegmentMapper.java:
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@@ -141,28 +149,42 @@ private Map<String, GenericRowFileManager> doMap()
RecordReaderFactory.getRecordReader(recordReaderFileConfig._fileFormat,
recordReaderFileConfig._dataFile,
recordReaderFileConfig._fieldsToRead,
recordReaderFileConfig._recordReaderConfig);
mapAndTransformRow(recordReader, reuse, observer, count, totalCount);
+ _recordReaderFileConfigs.get(i)._recordReader = recordReader;
+ if (!_constraintsChecker.canWrite()) {
+ LOGGER.info("Stopping record readers at index: {} as size limit
reached", i);
+ break;
+ }
} finally {
- if (recordReader != null) {
+ if (recordReader != null && !recordReader.hasNext()) {
recordReader.close();
}
}
} else {
+ if (!recordReader.hasNext()) {
+ LOGGER.info("Skipping record reader as it is already processed at
index: {}", i);
+ count++;
+ continue;
+ }
mapAndTransformRow(recordReader, reuse, observer, count, totalCount);
+ _recordReaderFileConfigs.get(i)._recordReader = recordReader;
+ if (!_constraintsChecker.canWrite()) {
Review Comment:
I put this as an optimisation to reduce calls to `mapAndTransformRow`. Let's
consider this flow : we get out of the `mapAndTransformRow` function because
the size constraint got violated, if we do not put the check in the post of
`mapAndTransformRow` and break, it will iterate through all the recordreaders
and make calls to mapAndTransformRow even though it will get out of
`mapAndTransformRow` because of the size constraint. Also the upcoming
recordreaders will be needlessly initialised.
Although, I should put this at the end of the loop instead of putting it
twice in the conditionals and once in `mapAndTransformRow`.
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