chenboat commented on a change in pull request #4914: [POC] By-passing
deep-store requirement for Realtime segment completion
URL: https://github.com/apache/incubator-pinot/pull/4914#discussion_r398959989
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/data/manager/realtime/RealtimeTableDataManager.java
##########
@@ -257,21 +280,78 @@ public void downloadAndReplaceSegment(String
segmentName, LLCRealtimeSegmentZKMe
final File segmentFolder = new File(_indexDir, segmentName);
FileUtils.deleteQuietly(segmentFolder);
try {
-
SegmentFetcherFactory.getInstance().getSegmentFetcherBasedOnURI(uri).fetchSegmentToLocal(uri,
tempFile);
- _logger.info("Downloaded file from {} to {}; Length of downloaded file:
{}", uri, tempFile, tempFile.length());
+ boolean downloadResult = downloadFromURI(uri, tempFile);
+ if (!downloadResult) {
+ String peerServerUri = getPeerServerURI(segmentName);
+ if (peerServerUri == null || !downloadFromURI(peerServerUri,
tempFile)) {
+ _logger.warn("Download segment {} from {} failed.", segmentName,
peerServerUri);
+ return;
+ }
+ }
TarGzCompressionUtils.unTar(tempFile, tempSegmentFolder);
- _logger.info("Uncompressed file {} into tmp dir {}", tempFile,
tempSegmentFolder);
+ _logger.warn("Uncompressed file {} into tmp dir {}", tempFile,
tempSegmentFolder);
FileUtils.moveDirectory(tempSegmentFolder.listFiles()[0], segmentFolder);
- _logger.info("Replacing LLC Segment {}", segmentName);
+ _logger.warn("Replacing LLC Segment {}", segmentName);
replaceLLSegment(segmentName, indexLoadingConfig);
} catch (Exception e) {
+ _logger.error("Failed to download segment {}.", e.getMessage());
throw new RuntimeException(e);
} finally {
FileUtils.deleteQuietly(tempFile);
FileUtils.deleteQuietly(tempSegmentFolder);
}
}
+ // Return the address of an ONLINE server hosting a segment.
+ private String getPeerServerURI(String segmentName) {
+ ExternalView externalViewForResource =
HelixHelper.getExternalViewForResource(_helixAdmin, _clusterName,
_tableNameWithType);
+ if (externalViewForResource == null ) {
+ _logger.warn("External View not found for segment {}", segmentName);
+ return null;
+ }
+ // Find out the ONLINE server serving the segment.
+ for(String segment : externalViewForResource.getPartitionSet()) {
+ if (!segmentName.equals(segment)) {
+ continue;
+ }
+
+ Map<String, String> instanceToStateMap =
externalViewForResource.getStateMap(segmentName);
+ for (Map.Entry<String, String> instanceState :
instanceToStateMap.entrySet()) {
+ if ("ONLINE".equals(instanceState.getValue())) {
+ _logger.info("Found ONLINE server {} for segment {}.",
instanceState.getKey(), segmentName);
+ String instanceId = instanceState.getKey();
+
+ String namePortStr =
instanceId.split(CommonConstants.Helix.PREFIX_OF_SERVER_INSTANCE)[1];
+ String hostName = namePortStr.split("_")[0];
Review comment:
Done.
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