leventov commented on a change in pull request #6699: release mmap immediately
after merge indexes
URL: https://github.com/apache/incubator-druid/pull/6699#discussion_r239528996
##########
File path: processing/src/main/java/org/apache/druid/segment/IndexMergerV9.java
##########
@@ -798,6 +798,40 @@ public File persist(
);
}
+ @Override
+ public File mergeSegmentFiles(
+ File[] segmentFiles,
+ boolean rollup,
+ AggregatorFactory[] metricAggs,
+ File outDir,
+ IndexSpec indexSpec,
+ @Nullable SegmentWriteOutMediumFactory segmentWriteOutMediumFactory
+ ) throws IOException
+ {
+ List<QueryableIndex> indexes =
Lists.transform(Arrays.asList(segmentFiles), input -> {
+ try {
+ return indexIO.loadIndex(input);
+ }
+ catch (IOException e) {
+ throw new ISE(e, "load index %s failed!?", input.getAbsolutePath());
+ }
+ });
+
+ try {
+ return mergeQueryableIndex(indexes, rollup, metricAggs, outDir,
indexSpec, new BaseProgressIndicator(), segmentWriteOutMediumFactory);
+ }
+ finally {
+ for (QueryableIndex index : indexes) {
Review comment:
Use Closer to close many objects.
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