rahulgoswami commented on code in PR #4279:
URL: https://github.com/apache/solr/pull/4279#discussion_r3097812268
##########
solr/core/src/test/org/apache/solr/handler/admin/UpgradeCoreIndexActionTest.java:
##########
@@ -365,10 +365,192 @@ public void
testUpgradeCoreIndexFailsWithNestedDocuments() throws Exception {
coreName),
resp));
- // Verify the exception message indicates nested documents are not
supported
+ // Verify the exception message indicates child documents are not
supported
assertThat(
thrown.getMessage(),
- containsString("does not support indexes containing nested
documents"));
+ containsString("does not support indexes containing child
documents"));
+ } finally {
+ admin.shutdown();
+ admin.close();
+ }
+ }
+
+ // --- Child docs detection tests ---
+ //
+ // These tests verify that the child document detection in the upgrade path
+ // correctly distinguishes between genuine child docs and non-child docs,
+ // even in the presence of updates and deletes that leave deleted documents
+ // in segments (since NoMergePolicy prevents segment merges from purging
them).
+
+ @Test
+ public void testChildDocsDetection_noChildDocsJustAdd() throws Exception {
+ for (int i = 0; i < 10; i++) {
+ assertU(adoc("id", String.valueOf(i), "title", "doc" + i));
+ }
+ assertU(commit("openSearcher", "true"));
+
+ assertUpgradeDoesNotDetectChildDocs();
+ }
+
+ @Test
+ public void testChildDocsDetection_withChildDocsJustAdd() throws Exception {
+ addChildDoc("100", "101");
+ addChildDoc("200", "201");
+ assertU(commit("openSearcher", "true"));
+
+ assertUpgradeDetectsChildDocs();
+ }
+
+ @Test
+ public void testChildDocsDetection_noChildDocsWithWithinCommitUpdates()
throws Exception {
+ // Add docs and then update some of them BEFORE committing, so both the old
+ // (deleted) and new versions end up in the same flushed segment.
+ // With NoMergePolicy and a 100MB RAM buffer (from SolrIndexConfig
defaults),
+ // no flush or merge occurs mid-batch, guaranteeing co-location.
+ //
+ // In the resulting segment, _root_ Terms stats will show:
+ // Terms.size() = N (unique _root_ values, one per unique id)
+ // Terms.getDocCount() = N + updates (includes deleted doc entries)
+ //
+ // A naive check (uniqueRootValues < docsWithRoot) may false-positive here
+ // because multiple docs share the same _root_ value within the segment.
+ for (int i = 0; i < 10; i++) {
+ assertU(adoc("id", String.valueOf(i), "title", "doc" + i));
+ }
+ // Re-add a few docs with the same ids (within-commit updates)
+ for (int i = 0; i < 3; i++) {
+ assertU(adoc("id", String.valueOf(i), "title", "updated_doc" + i));
+ }
+ assertU(commit("openSearcher", "true"));
+
+ // 10 live docs — the updates replaced 3 docs in-place
+ assertQ(req("q", "*:*"), "//result[@numFound='10']");
+ assertUpgradeDoesNotDetectChildDocs();
+ }
+
+ @Test
+ public void testChildDocsDetection_withChildDocsWithWithinCommitUpdates()
throws Exception {
Review Comment:
Totally agree with the idea of a utility function for this check. SolrCore
as @dsmiley suggested seems logical. Luke handler seems fine too since it gives
core level stats.
If you don't mind, can you please elaborate the case of "all deletes via
update" that you mentioned? Trying to make sure I fully comprehend it.
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