MrFlap commented on code in PR #15952:
URL: https://github.com/apache/lucene/pull/15952#discussion_r3095254794
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lucene/core/src/java/org/apache/lucene/codecs/KnnVectorsWriter.java:
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@@ -96,18 +107,22 @@ public final void merge(MergeState mergeState) throws
IOException {
}
}
- for (FieldInfo fieldInfo : mergeState.mergeFieldInfos) {
- if (fieldInfo.hasVectorValues()) {
- if (mergeState.infoStream.isEnabled("VV")) {
- mergeState.infoStream.message("VV", "merging " +
mergeState.segmentInfo);
- }
+ try {
+ for (FieldInfo fieldInfo : mergeState.mergeFieldInfos) {
+ if (fieldInfo.hasVectorValues()) {
+ if (mergeState.infoStream.isEnabled("VV")) {
+ mergeState.infoStream.message("VV", "merging " +
mergeState.segmentInfo);
+ }
- mergeOneField(fieldInfo, mergeState);
+ mergeOneField(fieldInfo, mergeState);
- if (mergeState.infoStream.isEnabled("VV")) {
- mergeState.infoStream.message("VV", "merge done " +
mergeState.segmentInfo);
+ if (mergeState.infoStream.isEnabled("VV")) {
+ mergeState.infoStream.message("VV", "merge done " +
mergeState.segmentInfo);
+ }
}
}
+ } finally {
+ afterMerge();
}
finish();
Review Comment:
We would like to manage the threads in `PerFieldKnnVectorsFormat`, which
doesn't get a callback once `KnnVectorsWriter.finish()` happens. Also, the
suggested `afterMerge()` runs in a finally block, so we can be sure to close
out the threads even on exception.
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