xuchuanyin commented on a change in pull request #3102: [CARBONDATA-3272]fix ArrayIndexOutOfBoundsException of horizontal compaction during update, when cardinality changes within a segment
URL:
https://github.com/apache/carbondata/pull/3102#discussion_r251230461
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File path: processing/src/main/java/org/apache/carbondata/processing/merger/CarbonCompactionExecutor.java
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@@ -140,25 +139,72 @@ public CarbonCompactionExecutor(Map<String, TaskBlockInfo> segmentMapping,
|| !CarbonCompactionUtil.isSorted(listMetadata.get(0));
for (String task : taskBlockListMapping) {
list = taskBlockInfo.getTableBlockInfoList(task);
- Collections.sort(list);
- LOGGER.info(
- "for task -" + task + "- in segment id -" + segmentId + "- block size is -" + list
- .size());
- queryModel.setTableBlockInfos(list);
- if (sortingRequired) {
- resultList.get(CarbonCompactionUtil.UNSORTED_IDX).add(
- new RawResultIterator(executeBlockList(list, segmentId, task, configuration),
- sourceSegProperties, destinationSegProperties, false));
- } else {
- resultList.get(CarbonCompactionUtil.SORTED_IDX).add(
- new RawResultIterator(executeBlockList(list, segmentId, task, configuration),
- sourceSegProperties, destinationSegProperties, false));
+ // during update there may be a chance that the cardinality may change within the segment
+ // which may lead to failure while converting the row, so get all the blocks present in a
+ // task and then split into multiple lists of same key length and create separate
+ // RawResultIterator for each list of same key length. If all the blocks have same keylength
+ // , then make a single RawResultIterator for all the blocks
+ List<List<TableBlockInfo>> listOfTableBlocksBasedOnKeyLength =
+ getListOfTableBlocksBasedOnKeyLength(list);
+ for (List<TableBlockInfo> tableBlockInfoList : listOfTableBlocksBasedOnKeyLength) {
+ Collections.sort(tableBlockInfoList);
+ LOGGER.info(
+ "for task -" + task + "- in segment id -" + segmentId + "- block size is -" + list
+ .size());
+ queryModel.setTableBlockInfos(tableBlockInfoList);
+ if (sortingRequired) {
Review comment:
please optimize the following branches since they are nearly the same.
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