SERVER-65131 Disable opportunistic read targeting

(cherry picked from commit e6547d5561be2e0fe51f5f7a317a094732f77c2c)

5 files changed, 42 insertions, 0 deletions

diff --git a/buildscripts/resmokeconfig/suites/sharding_opportunistic_secondary_targeting.yml b/buildscripts/resmokeconfig/suites/sharding_opportunistic_secondary_targeting.yml
new file mode 100644
index 00000000000..25fd82af0f7
--- /dev/null
+++ b/buildscripts/resmokeconfig/suites/sharding_opportunistic_secondary_targeting.yml
@@ -0,0 +1,16 @@
+test_kind: js_test
+
+selector:
+  roots:
+  - jstests/sharding/**/*.js
+  exclude_files:
+  - jstests/sharding/**/libs/**/*.js
+
+executor:
+  config:
+    shell_options:
+      nodb: ''
+      global_vars:
+        TestData:
+          setParametersMongos:
+            opportunisticSecondaryTargeting: true
diff --git a/etc/evergreen.yml b/etc/evergreen.yml
index 530ca05d62f..e6944846aff 100644
--- a/etc/evergreen.yml
+++ b/etc/evergreen.yml
@@ -265,6 +265,7 @@ buildvariants:
   - name: sharded_multi_stmt_txn_jscore_passthrough
   - name: .sharding .jscore !.wo_snapshot
   - name: sharding_gen
+  - name: sharding_opportunistic_secondary_targeting_gen
   - name: .stitch
   - name: server_discovery_and_monitoring_json_test_TG
     distros:
@@ -878,6 +879,7 @@ buildvariants:
     - windows-vsCurrent-large
   - name: session_jscore_passthrough
   - name: sharding_gen
+  - name: sharding_opportunistic_secondary_targeting_gen
   - name: .stitch
   - name: server_discovery_and_monitoring_json_test_TG
   - name: server_selection_json_test_TG
@@ -952,6 +954,7 @@ buildvariants:
   - name: sharding_auth_gen
   - name: sharding_auth_audit_gen
   - name: sharding_ese_gen
+  - name: sharding_opportunistic_secondary_targeting_gen
   - name: snmp
   - name: unittest_shell_hang_analyzer_gen
 
@@ -1448,6 +1451,7 @@ buildvariants:
   - name: sharding_api_version_jscore_passthrough_gen
   - name: .sharding .txns
   - name: .sharding .common
+  - name: sharding_opportunistic_secondary_targeting_gen
   - name: snmp
   - name: .stitch
   - name: .crypt
diff --git a/etc/evergreen_yml_components/definitions.yml b/etc/evergreen_yml_components/definitions.yml
index 434dac96a56..1ec9c3f2685 100644
--- a/etc/evergreen_yml_components/definitions.yml
+++ b/etc/evergreen_yml_components/definitions.yml
@@ -5710,6 +5710,14 @@ tasks:
     vars:
       use_large_distro: "true"
 
+- <<: *gen_task_template
+  name: sharding_opportunistic_secondary_targeting_gen
+  tags: ["sharding", "common"]
+  commands:
+  - func: "generate resmoke tasks"
+    vars:
+      use_large_distro: "true"
+
 - <<: *task_template
   name: snmp
   tags: []
diff --git a/src/mongo/executor/network_interface_tl.cpp b/src/mongo/executor/network_interface_tl.cpp
index 555b3677de4..1b74e1e9ee5 100644
--- a/src/mongo/executor/network_interface_tl.cpp
+++ b/src/mongo/executor/network_interface_tl.cpp
@@ -540,6 +540,11 @@ Status NetworkInterfaceTL::startCommand(const TaskExecutor::CallbackHandle& cbHa
                   });
     }
 
+    if ((request.target.size() > 1) && !request.hedgeOptions &&
+        !gOpportunisticSecondaryTargeting.load()) {
+        request.target.resize(1);
+    }
+
     auto [cmdState, future] = CommandState::make(this, request, cbHandle);
     if (cmdState->requestOnAny.timeout != cmdState->requestOnAny.kNoTimeout) {
         cmdState->deadline = cmdState->stopwatch.start() + cmdState->requestOnAny.timeout;
diff --git a/src/mongo/executor/network_interface_tl.idl b/src/mongo/executor/network_interface_tl.idl
index b71850511f4..b6d7d2088ac 100644
--- a/src/mongo/executor/network_interface_tl.idl
+++ b/src/mongo/executor/network_interface_tl.idl
@@ -34,3 +34,12 @@ feature_flags:
     description: Suppress network interface transport layer exceptions
     cpp_varname: gSuppressNetworkInterfaceTransportLayerExceptions
     default: false 
+
+server_parameters:
+  opportunisticSecondaryTargeting:
+    description: >-
+        Allows attempting to establish connections to multiple secondaries and directing the request
+        to the first secondary that accepts the connection.
+    set_at: [ startup, runtime ]
+    cpp_vartype: AtomicWord<bool>
+    cpp_varname: gOpportunisticSecondaryTargeting