klsince commented on a change in pull request #7319:
URL: https://github.com/apache/pinot/pull/7319#discussion_r708357041
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/data/manager/BaseTableDataManager.java
##########
@@ -256,4 +270,219 @@ public void addSegmentError(String segmentName,
SegmentErrorInfo segmentErrorInf
.collect(Collectors.toMap(map -> map.getKey().getSecond(),
Map.Entry::getValue));
}
}
+
+ @Override
+ public void reloadSegment(String segmentName, IndexLoadingConfig
indexLoadingConfig,
+ SegmentZKMetadata zkMetadata, SegmentMetadata localMetadata, Schema
schema, boolean forceDownload)
+ throws Exception {
+ File indexDir = localMetadata.getIndexDir();
+ Preconditions.checkState(indexDir.isDirectory(), "Index directory: %s is
not a directory", indexDir);
+
+ File parentFile = indexDir.getParentFile();
+ File segmentBackupDir =
+ new File(parentFile, indexDir.getName() +
CommonConstants.Segment.SEGMENT_BACKUP_DIR_SUFFIX);
+
+ try {
+ // First rename index directory to segment backup directory so that
original segment have all file descriptors
+ // point to the segment backup directory to ensure original segment
serves queries properly
+
+ // Rename index directory to segment backup directory (atomic)
+ Preconditions.checkState(indexDir.renameTo(segmentBackupDir),
+ "Failed to rename index directory: %s to segment backup directory:
%s", indexDir, segmentBackupDir);
+
+ // Download from remote or copy from local backup directory into index
directory,
+ // and then continue to load the segment from index directory.
+ boolean shouldDownload = forceDownload || !hasSameCRC(zkMetadata,
localMetadata);
+ if (shouldDownload && allowDownload(segmentName, zkMetadata)) {
+ if (forceDownload) {
+ LOGGER.info("Segment: {} of table: {} is forced to download",
segmentName, _tableNameWithType);
+ } else {
+ LOGGER.info("Download segment:{} of table: {} as local crc:{}
mismatches remote crc: {}", segmentName,
Review comment:
sharp eye!
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