Fix Discover trace waterfall behavior with duplicate spans (#244984)

smith · web-flow · commit a3bd73fd0e93 · 2025-12-08T18:09:05.000+01:00
Fixes #244238. Collapse query for trace items by span ID. Removes duplicates from query response.
diff --git a/x-pack/solutions/observability/plugins/apm/server/routes/traces/get_unified_trace_items.ts b/x-pack/solutions/observability/plugins/apm/server/routes/traces/get_unified_trace_items.ts
@@ -144,6 +144,7 @@ export async function getUnifiedTraceItems({
           minimum_should_match: 1,
         },
       },
+      collapse: { field: SPAN_ID },
       fields: [...fields, ...optionalFields],
       sort: [
         { _score: 'asc' },
