SERVER-94743 Get replication coordinator out of WT KV engine (#27016)

GitOrigin-RevId: c3784e32978a0436b815ddbb5fd5db448b60bc84

src/mongo/db/repl/rollback_impl.cpp

@@ -267,10 +267,20 @@ Status RollbackImpl::runRollback(OperationContext* opCtx) {
         rollbackHangAfterTransitionToRollback.pauseWhileSet(opCtx);
     }
 
+    auto& sizeRecovery = sizeRecoveryState(opCtx->getServiceContext());
+
     // We clear the SizeRecoveryState before we recover to a stable timestamp. This ensures that we
     // only use size adjustment markings from the storage and replication recovery processes in this
     // rollback.
-    sizeRecoveryState(opCtx->getServiceContext()).clearStateBeforeRecovery();
+    sizeRecovery.clearStateBeforeRecovery();
+
+    // Sizes should always be checked when creating a collection during rollback. This is in case
+    // the size storer information is no longer accurate. This may be necessary if capped deletes
+    // are rolled-back or if rollback occurs across a collection rename.
+    sizeRecovery.setRecordStoresShouldAlwaysCheckSize(true);
+    ScopeGuard sizeRecoveryStateGuard{[&sizeRecovery] {
+        sizeRecovery.setRecordStoresShouldAlwaysCheckSize(false);
+    }};
 
     // After successfully transitioning to the ROLLBACK state, we must always transition back to
     // SECONDARY, even if we fail at any point during the rollback process.

src/mongo/db/server_recovery.cpp

@@ -63,6 +63,21 @@ void SizeRecoveryState::clearStateBeforeRecovery() {
     stdx::lock_guard<Latch> lock(_mutex);
     _collectionsAlwaysNeedingSizeAdjustment.clear();
 }
+
+void SizeRecoveryState::setRecordStoresShouldAlwaysCheckSize(bool shouldAlwayCheckSize) {
+    stdx::lock_guard<Latch> lock(_mutex);
+    _recordStoresShouldAlwayCheckSize = shouldAlwayCheckSize;
+}
+
+bool SizeRecoveryState::shouldRecordStoresAlwaysCheckSize() const {
+    stdx::lock_guard<Latch> lock(_mutex);
+    // Regardless of whether the _recordStoresShouldAlwayCheckSize flag is set, if we are in
+    // replication recovery then sizes should always be checked. This is in case the size storer
+    // information is no longer accurate. This may be necessary if a collection creation was not
+    // part of a stable checkpoint.
+    return _recordStoresShouldAlwayCheckSize ||
+        inReplicationRecovery(getGlobalServiceContext()).load();
+}
 }  // namespace mongo
 
 mongo::AtomicWord<bool>& mongo::inReplicationRecovery(ServiceContext* serviceCtx) {

src/mongo/db/server_recovery.h

@@ -80,9 +80,22 @@ public:
      */
     void clearStateBeforeRecovery();
 
+    /**
+     * Informs the SizeRecoveryState that record stores should always check their size information.
+     */
+    void setRecordStoresShouldAlwaysCheckSize(bool);
+
+    /**
+     * Returns whether record stores should always check their size information. This can either be
+     * due to setRecordStoresShouldAlwaysCheckSize being called or due to being in replication
+     * recovery.
+     */
+    bool shouldRecordStoresAlwaysCheckSize() const;
+
 private:
     mutable Mutex _mutex = MONGO_MAKE_LATCH("SizeRecoveryState::_mutex");
     StringSet _collectionsAlwaysNeedingSizeAdjustment;
+    bool _recordStoresShouldAlwayCheckSize = false;
 };
 
 /**

src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp

@@ -79,7 +79,6 @@
 #include "mongo/db/query/bson/dotted_path_support.h"
 #include "mongo/db/repl/member_state.h"
 #include "mongo/db/repl/repl_settings.h"
-#include "mongo/db/repl/replication_coordinator.h"
 #include "mongo/db/server_feature_flags_gen.h"
 #include "mongo/db/server_options.h"
 #include "mongo/db/server_parameter.h"
@@ -182,14 +181,6 @@ std::string extractIdentFromPath(const boost::filesystem::path& dbpath,
 }
 
 bool WiredTigerFileVersion::shouldDowngrade(bool hasRecoveryTimestamp) {
-    const auto replCoord = repl::ReplicationCoordinator::get(getGlobalServiceContext());
-    if (replCoord && replCoord->getMemberState().arbiter()) {
-        // SERVER-35361: Arbiters will no longer downgrade their data files. To downgrade
-        // binaries, the user must delete the dbpath. It's not particularly expensive for a
-        // replica set to re-initialize an arbiter that comes online.
-        return false;
-    }
-
     const auto fcvSnapshot = serverGlobalParams.featureCompatibility.acquireFCVSnapshot();
     if (!fcvSnapshot.isVersionInitialized()) {
         // If the FCV document hasn't been read, trust the WT compatibility. MongoD will
@@ -1620,13 +1611,7 @@ std::unique_ptr<RecordStore> WiredTigerKVEngine::getRecordStore(OperationContext
     ret = std::make_unique<WiredTigerRecordStore>(this, opCtx, params);
     ret->postConstructorInit(opCtx, nss);
 
-    // Sizes should always be checked when creating a collection during rollback or replication
-    // recovery. This is in case the size storer information is no longer accurate. This may be
-    // necessary if capped deletes are rolled-back, if rollback occurs across a collection rename,
-    // or when collection creation is not part of a stable checkpoint.
-    const auto replCoord = repl::ReplicationCoordinator::get(getGlobalServiceContext());
-    const bool inRollback = replCoord && replCoord->getMemberState().rollback();
-    if (inRollback || inReplicationRecovery(getGlobalServiceContext()).load()) {
+    if (sizeRecoveryState(opCtx->getServiceContext()).shouldRecordStoresAlwaysCheckSize()) {
         ret->checkSize(opCtx);
     }