Bump versions after 8.18.8 release

Author: elasticsearchmachine

.buildkite/pipelines/intake.yml

@@ -56,7 +56,7 @@ steps:
         timeout_in_minutes: 300
         matrix:
           setup:
-            BWC_VERSION: ["8.18.8", "9.0.8"]
+            BWC_VERSION: ["8.18.9", "9.0.8"]
         agents:
           provider: gcp
           image: family/elasticsearch-ubuntu-2404

.buildkite/pipelines/periodic-java-ea.yml

@@ -347,8 +347,8 @@ steps:
             - signal_reason: agent_stop
               limit: 3
 
-      - label: 8.18.8 / bwc
-        command: .ci/scripts/run-gradle.sh -Druntime.java=$$JAVA_EA_VERSION -Dbwc.checkout.align=true v8.18.8#bwcTest
+      - label: 8.18.9 / bwc
+        command: .ci/scripts/run-gradle.sh -Druntime.java=$$JAVA_EA_VERSION -Dbwc.checkout.align=true v8.18.9#bwcTest
         timeout_in_minutes: 300
         agents:
           provider: gcp
@@ -357,7 +357,7 @@ steps:
           buildDirectory: /dev/shm/bk
           preemptible: true
         env:
-          BWC_VERSION: 8.18.8
+          BWC_VERSION: 8.18.9
         retry:
           automatic:
             - exit_status: "-1"
@@ -439,7 +439,7 @@ steps:
         timeout_in_minutes: 300
         matrix:
           setup:
-            BWC_VERSION: ["8.18.8", "9.0.8"]
+            BWC_VERSION: ["8.18.9", "9.0.8"]
         agents:
           provider: gcp
           image: family/elasticsearch-ubuntu-2404

.buildkite/pipelines/periodic-packaging.yml

@@ -318,8 +318,8 @@ steps:
         env:
           BWC_VERSION: 8.17.10
 
-      - label: "{{matrix.image}} / 8.18.8 / packaging-tests-upgrade"
-        command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v8.18.8
+      - label: "{{matrix.image}} / 8.18.9 / packaging-tests-upgrade"
+        command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v8.18.9
         timeout_in_minutes: 300
         matrix:
           setup:
@@ -332,7 +332,7 @@ steps:
           machineType: custom-16-32768
           buildDirectory: /dev/shm/bk
         env:
-          BWC_VERSION: 8.18.8
+          BWC_VERSION: 8.18.9
 
       - label: "{{matrix.image}} / 9.0.8 / packaging-tests-upgrade"
         command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v9.0.8

.buildkite/pipelines/periodic.yml

@@ -344,8 +344,8 @@ steps:
             - signal_reason: agent_stop
               limit: 3
 
-      - label: 8.18.8 / bwc
-        command: .ci/scripts/run-gradle.sh -Dbwc.checkout.align=true v8.18.8#bwcTest
+      - label: 8.18.9 / bwc
+        command: .ci/scripts/run-gradle.sh -Dbwc.checkout.align=true v8.18.9#bwcTest
         timeout_in_minutes: 300
         agents:
           provider: gcp
@@ -354,7 +354,7 @@ steps:
           buildDirectory: /dev/shm/bk
           preemptible: true
         env:
-          BWC_VERSION: 8.18.8
+          BWC_VERSION: 8.18.9
         retry:
           automatic:
             - exit_status: "-1"
@@ -448,7 +448,7 @@ steps:
           setup:
             ES_RUNTIME_JAVA:
               - openjdk21
-            BWC_VERSION: ["8.18.8", "9.0.8"]
+            BWC_VERSION: ["8.18.9", "9.0.8"]
         agents:
           provider: gcp
           image: family/elasticsearch-ubuntu-2404
@@ -490,7 +490,7 @@ steps:
             ES_RUNTIME_JAVA:
               - openjdk21
               - openjdk23
-            BWC_VERSION: ["8.18.8", "9.0.8"]
+            BWC_VERSION: ["8.18.9", "9.0.8"]
         agents:
           provider: gcp
           image: family/elasticsearch-ubuntu-2404

.ci/bwcVersions

@@ -17,5 +17,5 @@ BWC_VERSION:
   - "8.15.5"
   - "8.16.6"
   - "8.17.10"
-  - "8.18.8"
+  - "8.18.9"
   - "9.0.8"

.ci/snapshotBwcVersions

@@ -1,3 +1,3 @@
 BWC_VERSION:
-  - "8.18.8"
+  - "8.18.9"
   - "9.0.8"

server/src/main/java/org/elasticsearch/Version.java

@@ -215,6 +215,7 @@ public class Version implements VersionId<Version>, ToXContentFragment {
     public static final Version V_8_18_6 = new Version(8_18_06_99);
     public static final Version V_8_18_7 = new Version(8_18_07_99);
     public static final Version V_8_18_8 = new Version(8_18_08_99);
+    public static final Version V_8_18_9 = new Version(8_18_09_99);
     public static final Version V_9_0_0 = new Version(9_00_00_99);
     public static final Version V_9_0_1 = new Version(9_00_01_99);
     public static final Version V_9_0_2 = new Version(9_00_02_99);

server/src/main/resources/org/elasticsearch/TransportVersions.csv

@@ -159,6 +159,7 @@
 8.18.5,8840007
 8.18.6,8840008
 8.18.7,8840009
+8.18.8,8840002
 9.0.0,9000009
 9.0.1,9000010
 9.0.2,9000011

server/src/main/resources/org/elasticsearch/index/IndexVersions.csv

@@ -159,6 +159,7 @@
 8.18.5,8525000
 8.18.6,8525000
 8.18.7,8525000
+8.18.8,8525000
 9.0.0,9009000
 9.0.1,9009000
 9.0.2,9009000

server/src/main/resources/transport/definitions/unreferable/initial_8.18.9.csv

@@ -0,0 +1 @@
+8840012