Jackie-Jiang commented on a change in pull request #6754:
URL: https://github.com/apache/incubator-pinot/pull/6754#discussion_r609131209
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/segment/index/loader/SegmentPreProcessor.java
##########
@@ -104,6 +105,8 @@ public void process()
defaultColumnHandler.updateDefaultColumns();
_segmentMetadata = new SegmentMetadataImpl(_indexDir);
_segmentDirectory.reloadMetadata();
+ } else {
+ LOGGER.warn("The table schema is null for the segment {}.",
_segmentMetadata.getName());
Review comment:
```suggestion
LOGGER.warn("Skip creating default columns for segment: {} without
schema", _segmentMetadata.getName());
```
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/segment/index/loader/SegmentPreProcessor.java
##########
@@ -81,6 +81,7 @@ public SegmentPreProcessor(File indexDir, IndexLoadingConfig
indexLoadingConfig,
public void process()
throws Exception {
if (_segmentMetadata.getTotalDocs() == 0) {
+ LOGGER.info("Skip preprocessing because the segment {} has 0 doc.",
_segmentMetadata.getName());
Review comment:
```suggestion
LOGGER.info("Skip preprocessing empty segment: {}",
_segmentMetadata.getName());
```
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/segment/index/loader/defaultcolumn/BaseDefaultColumnHandler.java
##########
@@ -133,6 +133,7 @@ public void updateDefaultColumns()
// Compute the action needed for each column.
Map<String, DefaultColumnAction> defaultColumnActionMap =
computeDefaultColumnActionMap();
if (defaultColumnActionMap.isEmpty()) {
+ LOGGER.info("No default column action needed for the segment {}.",
_segmentMetadata.getName());
Review comment:
I would avoid logging this because it will be logged in 99% of the case,
where no default columns need to be generated. We already have logs if we do
need to generate default columns.
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