Adapt minimum versions for seq# powered operations in Watch related requests and UpdateRequest

build.gradle

@@ -159,8 +159,8 @@ task verifyVersions {
  * the enabled state of every bwc task. It should be set back to true
  * after the backport of the backcompat code is complete.
  */
-final boolean bwc_tests_enabled = false
-final String bwc_tests_disabled_issue = "https://github.com/elastic/elasticsearch/pull/37951" /* place a PR link here when committing bwc changes */
+final boolean bwc_tests_enabled = true
+final String bwc_tests_disabled_issue = "" /* place a PR link here when committing bwc changes */
 if (bwc_tests_enabled == false) {
   if (bwc_tests_disabled_issue.isEmpty()) {
     throw new GradleException("bwc_tests_disabled_issue must be set when bwc_tests_enabled == false")

rest-api-spec/src/main/resources/rest-api-spec/test/update/35_if_seq_no.yml

@@ -2,8 +2,8 @@
 "Update with if_seq_no":
 
  - skip:
-      version: " - 6.99.99"
-      reason: if_seq_no was added in 7.0
+      version: " - 6.6.99"
+      reason: if_seq_no was added in 6.7.0
 
  - do:
       catch:        missing

server/src/main/java/org/elasticsearch/action/update/UpdateRequest.java

@@ -879,10 +879,8 @@ public void readFrom(StreamInput in) throws IOException {
         docAsUpsert = in.readBoolean();
         version = in.readLong();
         versionType = VersionType.fromValue(in.readByte());
-        if (in.getVersion().onOrAfter(Version.V_7_0_0)) {
-            ifSeqNo = in.readZLong();
-            ifPrimaryTerm = in.readVLong();
-        }
+        ifSeqNo = in.readZLong();
+        ifPrimaryTerm = in.readVLong();
         detectNoop = in.readBoolean();
         scriptedUpsert = in.readBoolean();
     }
@@ -934,10 +932,8 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeBoolean(docAsUpsert);
         out.writeLong(version);
         out.writeByte(versionType.getValue());
-        if (out.getVersion().onOrAfter(Version.V_7_0_0)) {
-            out.writeZLong(ifSeqNo);
-            out.writeVLong(ifPrimaryTerm);
-        }
+        out.writeZLong(ifSeqNo);
+        out.writeVLong(ifPrimaryTerm);
         out.writeBoolean(detectNoop);
         out.writeBoolean(scriptedUpsert);
     }

x-pack/plugin/core/src/main/java/org/elasticsearch/protocol/xpack/watcher/PutWatchRequest.java

@@ -5,7 +5,6 @@
  */
 package org.elasticsearch.protocol.xpack.watcher;
 
-import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.common.Strings;
@@ -60,13 +59,8 @@ public void readFrom(StreamInput in) throws IOException {
         active = in.readBoolean();
         xContentType = in.readEnum(XContentType.class);
         version = in.readZLong();
-        if (in.getVersion().onOrAfter(Version.V_7_0_0)) {
-            ifSeqNo = in.readZLong();
-            ifPrimaryTerm = in.readVLong();
-        } else {
-            ifSeqNo = SequenceNumbers.UNASSIGNED_SEQ_NO;
-            ifPrimaryTerm = UNASSIGNED_PRIMARY_TERM;
-        }
+        ifSeqNo = in.readZLong();
+        ifPrimaryTerm = in.readVLong();
     }
 
     @Override
@@ -77,10 +71,8 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeBoolean(active);
         out.writeEnum(xContentType);
         out.writeZLong(version);
-        if (out.getVersion().onOrAfter(Version.V_7_0_0)) {
-            out.writeZLong(ifSeqNo);
-            out.writeVLong(ifPrimaryTerm);
-        }
+        out.writeZLong(ifSeqNo);
+        out.writeVLong(ifPrimaryTerm);
     }
 
     /**

x-pack/plugin/core/src/main/java/org/elasticsearch/protocol/xpack/watcher/PutWatchResponse.java

@@ -5,7 +5,6 @@
  */
 package org.elasticsearch.protocol.xpack.watcher;
 
-import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.io.stream.StreamInput;
@@ -110,10 +109,8 @@ public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
         out.writeString(id);
         out.writeVLong(version);
-        if (out.getVersion().onOrAfter(Version.V_7_0_0)) {
-            out.writeZLong(seqNo);
-            out.writeVLong(primaryTerm);
-        }
+        out.writeZLong(seqNo);
+        out.writeVLong(primaryTerm);
         out.writeBoolean(created);
     }
 
@@ -122,13 +119,8 @@ public void readFrom(StreamInput in) throws IOException {
         super.readFrom(in);
         id = in.readString();
         version = in.readVLong();
-        if (in.getVersion().onOrAfter(Version.V_7_0_0)) {
-            seqNo = in.readZLong();
-            primaryTerm = in.readVLong();
-        } else {
-            seqNo = SequenceNumbers.UNASSIGNED_SEQ_NO;
-            primaryTerm = SequenceNumbers.UNASSIGNED_PRIMARY_TERM;
-        }
+        seqNo = in.readZLong();
+        primaryTerm = in.readVLong();
         created = in.readBoolean();
     }
 

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/watcher/transport/actions/get/GetWatchResponse.java

@@ -5,7 +5,6 @@
  */
 package org.elasticsearch.xpack.core.watcher.transport.actions.get;
 
-import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.io.stream.StreamInput;
@@ -96,10 +95,8 @@ public void readFrom(StreamInput in) throws IOException {
             status = WatchStatus.read(in);
             source = XContentSource.readFrom(in);
             version = in.readZLong();
-            if (in.getVersion().onOrAfter(Version.V_7_0_0)) {
-                seqNo = in.readZLong();
-                primaryTerm = in.readVLong();
-            }
+            seqNo = in.readZLong();
+            primaryTerm = in.readVLong();
         } else {
             status = null;
             source = null;
@@ -118,10 +115,8 @@ public void writeTo(StreamOutput out) throws IOException {
             status.writeTo(out);
             XContentSource.writeTo(source, out);
             out.writeZLong(version);
-            if (out.getVersion().onOrAfter(Version.V_7_0_0)) {
-                out.writeZLong(seqNo);
-                out.writeVLong(primaryTerm);
-            }
+            out.writeZLong(seqNo);
+            out.writeVLong(primaryTerm);
         }
     }
 

x-pack/plugin/src/test/resources/rest-api-spec/test/watcher/put_watch/80_put_get_watch_with_passwords.yml

@@ -224,8 +224,8 @@ setup:
 ---
 "Test putting a watch with a redacted password with old seq no returns an error":
   - skip:
-      version: " - 6.99.99"
-      reason:  seq no powered concurrency was added in 7.0.0
+      version: " - 6.6.99"
+      reason:  seq no powered concurrency was added in 6.7.0
 
   # version 1
   - do:

x-pack/plugin/watcher/src/main/java/org/elasticsearch/xpack/watcher/transport/actions/ack/TransportAckWatchAction.java

@@ -7,7 +7,6 @@
 
 import org.elasticsearch.ElasticsearchStatusException;
 import org.elasticsearch.ResourceNotFoundException;
-import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.get.GetRequest;
 import org.elasticsearch.action.get.GetResponse;
@@ -102,12 +101,8 @@ protected void doExecute(AckWatchRequest request, ActionListener<AckWatchRespons
 
                             UpdateRequest updateRequest = new UpdateRequest(Watch.INDEX, Watch.DOC_TYPE, request.getWatchId());
                             // this may reject this action, but prevents concurrent updates from a watch execution
-                            if (clusterService.state().nodes().getMinNodeVersion().onOrAfter(Version.V_7_0_0)) {
-                                updateRequest.setIfSeqNo(getResponse.getSeqNo());
-                                updateRequest.setIfPrimaryTerm(getResponse.getPrimaryTerm());
-                            } else {
-                                updateRequest.version(getResponse.getVersion());
-                            }
+                            updateRequest.setIfSeqNo(getResponse.getSeqNo());
+                            updateRequest.setIfPrimaryTerm(getResponse.getPrimaryTerm());
                             updateRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
                             XContentBuilder builder = jsonBuilder();
                             builder.startObject()