mcvsubbu commented on a change in pull request #3877: Pinot controller side
change to enhance LLC segment metadata upload.
URL: https://github.com/apache/incubator-pinot/pull/3877#discussion_r263949161
##########
File path:
pinot-controller/src/main/java/org/apache/pinot/controller/api/resources/LLCSegmentCompletionHandlers.java
##########
@@ -276,10 +317,182 @@ public String
segmentUpload(@QueryParam(SegmentCompletionProtocol.PARAM_INSTANCE
return response;
}
+ @POST
+ @Path(SegmentCompletionProtocol.MSG_TYPE_COMMIT_END_METADATA)
+ @Produces(MediaType.APPLICATION_JSON)
+ @Consumes(MediaType.MULTIPART_FORM_DATA)
+ public String
segmentCommitEndWithMetadata(@QueryParam(SegmentCompletionProtocol.PARAM_INSTANCE_ID)
String instanceId,
+
@QueryParam(SegmentCompletionProtocol.PARAM_SEGMENT_NAME) String segmentName,
+
@QueryParam(SegmentCompletionProtocol.PARAM_SEGMENT_LOCATION) String
segmentLocation,
+
@QueryParam(SegmentCompletionProtocol.PARAM_OFFSET) long offset,
+
@QueryParam(SegmentCompletionProtocol.PARAM_MEMORY_USED_BYTES) long
memoryUsedBytes,
+
@QueryParam(SegmentCompletionProtocol.PARAM_BUILD_TIME_MILLIS) long
buildTimeMillis,
+
@QueryParam(SegmentCompletionProtocol.PARAM_WAIT_TIME_MILLIS) long
waitTimeMillis,
+
@QueryParam(SegmentCompletionProtocol.PARAM_ROW_COUNT) int numRows,
+
@QueryParam(SegmentCompletionProtocol.PARAM_SEGMENT_SIZE_BYTES) long
segmentSizeBytes,
+ FormDataMultiPart metadataFiles) {
+ if (instanceId == null || segmentName == null || offset == -1 ||
segmentLocation == null || metadataFiles == null) {
+ LOGGER.error("Invalid call: offset={}, segmentName={}, instanceId={},
segmentLocation={}", offset, segmentName,
+ instanceId, segmentLocation);
+ // TODO: memoryUsedInBytes = 0 if not present in params. Add validation
when we start using it
+ return SegmentCompletionProtocol.RESP_FAILED.toJsonString();
+ }
+
+ SegmentCompletionProtocol.Request.Params requestParams = new
SegmentCompletionProtocol.Request.Params();
+
requestParams.withInstanceId(instanceId).withSegmentName(segmentName).withOffset(offset)
+
.withSegmentLocation(segmentLocation).withSegmentSizeBytes(segmentSizeBytes)
+
.withBuildTimeMillis(buildTimeMillis).withWaitTimeMillis(waitTimeMillis).withNumRows(numRows)
+ .withMemoryUsedBytes(memoryUsedBytes);
+ LOGGER.info("Processing segmentCommitEnd:{}", requestParams.toString());
+
+
+ final boolean isSuccess = true;
+ final boolean isSplitCommit = true;
+ SegmentMetadataImpl segmentMetadata =
extractMetadataFromInput(metadataFiles, segmentName);
+ // If it fails to extract metadata from the input form, return failure.
+ if (segmentMetadata == null) {
+ LOGGER.warn("Segment metadata extraction failure for segment {}",
segmentName);
+ return SegmentCompletionProtocol.RESP_FAILED.toJsonString();
+ }
+ SegmentCompletionProtocol.Response response =
+
SegmentCompletionManager.getInstance().segmentCommitEnd(requestParams,
isSuccess, isSplitCommit,
+
CommittingSegmentDescriptor.fromSegmentCompletionReqParamsAndMetadata(requestParams,
segmentMetadata));
+ final String responseStr = response.toJsonString();
+ LOGGER.info("Response to segmentCommitEnd:{}", responseStr);
+ return responseStr;
+ }
+
+ /**
+ * Extract and return the segment metadata from the two input form data
files (metadata file and creation meta).
+ * Return null if any of the two files is missing or there is exception
during parsing and extraction.
+ *
+ */
+ private SegmentMetadataImpl extractMetadataFromInput(FormDataMultiPart
metadataFiles, String segmentNameStr) {
+ String tempMetadataDirStr = StringUtil.join("/",
_controllerConf.getLocalTempDir(), segmentNameStr + METADATA_TEMP_DIR_SUFFIX);
Review comment:
Best to add current time as well as tmp_dir_suffix. Although with rare race
and timing conditions, it is possible that multiple servers are executing this
code path. We don't have lock here, but we do lock inside the state machine to
protect ourselves that only one of them can commit.
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