Merge branch 'main' into pinned-retriever

Author: mridula-s109

.backportrc.json

@@ -1,10 +1,9 @@
 {
   "upstream" : "elastic/elasticsearch",
-  "targetBranchChoices" : [ "main", "8.x", "9.0", "8.18", "8.17", "8.16", "8.15", "8.14", "8.13", "8.12", "8.11", "8.10", "8.9", "8.8", "8.7", "8.6", "8.5", "8.4", "8.3", "8.2", "8.1", "8.0", "7.17", "6.8" ],
+  "targetBranchChoices" : [ "main", "9.0", "8.19", "8.18", "8.17", "8.16", "8.15", "8.14", "8.13", "8.12", "8.11", "8.10", "8.9", "8.8", "8.7", "8.6", "8.5", "8.4", "8.3", "8.2", "8.1", "8.0", "7.17", "6.8" ],
   "targetPRLabels" : [ "backport" ],
   "branchLabelMapping" : {
     "^v9.1.0$" : "main",
-    "^v8.19.0$" : "8.x",
     "^v(\\d+).(\\d+).\\d+(?:-(?:alpha|beta|rc)\\d+)?$" : "$1.$2"
   }
 }

.buildkite/pipelines/periodic.template.yml

@@ -237,7 +237,7 @@ steps:
       image: family/elasticsearch-ubuntu-2004
       machineType: n2-standard-8
       buildDirectory: /dev/shm/bk
-    if: build.branch == "main" || build.branch == "8.x" || build.branch == "7.17"
+    if: build.branch == "main" || build.branch == "8.19" || build.branch == "7.17"
   - label: check-branch-consistency
     command: .ci/scripts/run-gradle.sh branchConsistency
     timeout_in_minutes: 15

.buildkite/pipelines/periodic.yml

@@ -656,7 +656,7 @@ steps:
       image: family/elasticsearch-ubuntu-2004
       machineType: n2-standard-8
       buildDirectory: /dev/shm/bk
-    if: build.branch == "main" || build.branch == "8.x" || build.branch == "7.17"
+    if: build.branch == "main" || build.branch == "8.19" || build.branch == "7.17"
   - label: check-branch-consistency
     command: .ci/scripts/run-gradle.sh branchConsistency
     timeout_in_minutes: 15

.ci/scripts/resolve-dra-manifest.sh

@@ -24,11 +24,6 @@ if [ "$LATEST_VERSION" != "$ES_VERSION" ]; then
   echo "Latest build for '$ARTIFACT' is version $LATEST_VERSION but expected version $ES_VERSION." 1>&2
   NEW_BRANCH=$(echo $ES_VERSION | sed -E "s/([0-9]+\.[0-9]+)\.[0-9]/\1/g")
 
-  # Temporary
-  if [[ "$ES_VERSION" == "8.16.0" ]]; then
-    NEW_BRANCH="8.x"
-  fi
-
   echo "Using branch $NEW_BRANCH instead of $BRANCH." 1>&2
   LATEST_BUILD=$(fetch_build $WORKFLOW $ARTIFACT $NEW_BRANCH)
 fi

branches.json

@@ -8,13 +8,13 @@
       "branch": "9.0"
     },
     {
-      "branch": "8.18"
+      "branch": "8.19"
     },
     {
-      "branch": "8.17"
+      "branch": "8.18"
     },
     {
-      "branch": "8.x"
+      "branch": "8.17"
     },
     {
       "branch": "7.17"

docs/changelog/126091.yaml

@@ -0,0 +1,5 @@
+pr: 126091
+summary: Allow balancing weights to be set per tier
+area: Allocation
+type: enhancement
+issues: []

docs/changelog/126286.yaml

@@ -0,0 +1,6 @@
+pr: 127225
+summary: Fix count optimization with pushable union types
+area: ES|QL
+type: bug
+issues:
+ - 127200

docs/changelog/127225.yaml

@@ -0,0 +1,16 @@
+pr: 127351
+summary: Allow partial results by default in ES|QL
+area: ES|QL
+type: breaking
+issues: [122802]
+
+breaking:
+  title: Allow partial results by default in ES|QL
+  area: ES|QL
+  details: >-
+    In earlier versions of {es}, ES|QL would fail the entire query if it encountered any error. ES|QL now returns partial results instead of failing when encountering errors.
+
+  impact: >-
+    Callers should check the `is_partial` flag returned in the response to determine if the result is partial or complete. If returning partial results is not desired, this option can be overridden per request via an `allow_partial_results` parameter in the query URL or globally via the cluster setting `esql.query.allow_partial_results`.
+
+  notable: true