SERVER-111321 Make random balancer policy move viewless timeseries collections (#41693)

GitOrigin-RevId: 91afadbc463a55c2c88d85939167a7fc68b0504d

buildscripts/resmokeconfig/matrix_suites/generated_suites/sharding_legacy_timeseries_no_rawdata.yml

@@ -20,6 +20,7 @@ matrix_suite: true
 selector:
   roots:
     - jstests/sharding/analyze_shard_key/analyze_shard_key_cmd_validation.js
+    - jstests/sharding/balancer_should_return_random_migrations_failpoint.js
     - jstests/sharding/*timeseries*/*.js
     - jstests/sharding/**/*timeseries*.js
 test_kind: js_test

buildscripts/resmokeconfig/matrix_suites/generated_suites/sharding_viewless_timeseries.yml

@@ -27,6 +27,7 @@ selector:
   roots:
     - jstests/sharding/analyze_shard_key/analyze_shard_key_cmd_validation.js
     - jstests/sharding/analyze_shard_key/timeseries.js
+    - jstests/sharding/balancer_should_return_random_migrations_failpoint.js
     - jstests/sharding/libs/timeseries_update_multi_util.js
     - jstests/sharding/query/sample_timeseries.js
     - jstests/sharding/resharding_timeseries/move_timeseries.js

buildscripts/resmokeconfig/matrix_suites/overrides/viewless_timeseries.yml

@@ -57,6 +57,7 @@
       exclude_files: null
       roots:
         - jstests/sharding/analyze_shard_key/analyze_shard_key_cmd_validation.js
+        - jstests/sharding/balancer_should_return_random_migrations_failpoint.js
         - jstests/sharding/*timeseries*/*.js
         - jstests/sharding/**/*timeseries*.js
 - name: only_validated_sharding_timeseries_tests_selector
@@ -66,6 +67,7 @@
       roots:
         - jstests/sharding/analyze_shard_key/analyze_shard_key_cmd_validation.js
         - jstests/sharding/analyze_shard_key/timeseries.js
+        - jstests/sharding/balancer_should_return_random_migrations_failpoint.js
         - jstests/sharding/libs/timeseries_update_multi_util.js
         - jstests/sharding/query/sample_timeseries.js
         - jstests/sharding/resharding_timeseries/move_timeseries.js

jstests/sharding/balancer_should_return_random_migrations_failpoint.js

@@ -9,6 +9,7 @@
 import {FeatureFlagUtil} from "jstests/libs/feature_flag_util.js";
 import {ShardingTest} from "jstests/libs/shardingtest.js";
 import {findChunksUtil} from "jstests/sharding/libs/find_chunks_util.js";
+import {getTimeseriesCollForDDLOps} from "jstests/core/timeseries/libs/viewless_timeseries_util.js";
 
 // TODO SERVER-89399: re-enable the hook once it properly serialize with resharding operations
 TestData.skipCheckShardFilteringMetadata = true;
@@ -108,7 +109,8 @@ let initialPlacements = {};
 let trackableCollections = ["unsharded", "sharded"];
 
 if (isReshardingForTimeseriesEnabled) {
-    trackableCollections.push("system.buckets.timeseries");
+    let db = st.s.getDB(dbNames[0]);
+    trackableCollections.push(getTimeseriesCollForDDLOps(db, db["timeseries"]).getName());
 }
 
 for (const dbName of dbNames) {

src/mongo/db/s/balancer/move_unsharded_policy.cpp

@@ -104,8 +104,15 @@ std::map<NamespaceString, ListCollectionsReplyItem> getCollectionsFromShard(
     for (auto&& replyItemBson : listCollResponse.docs) {
         auto replyItem =
             ListCollectionsReplyItem::parse(replyItemBson, IDLParserContext("ListCollectionReply"));
-        if (replyItem.getType() != "collection") {
+        if (replyItem.getType() == "view") {
-            // This entry is not a collection (e.g. view)
+            // Do not try to move views
+            continue;
+        }
+        // TODO SERVER-111320: remove the following condition after 9.0 becomes last LTS.
+        // Only viewless timeseries will exists by then.
+        if (replyItem.getType() == "timeseries" &&
+            !(replyItem.getInfo() && replyItem.getInfo()->getUuid())) {
+            // Do not try to move legacy timeseries view
             continue;
         }
         auto nss = NamespaceStringUtil::deserialize(dbName, replyItem.getName());