SERVER-58533 Log FCV at initialization and on log rotation

1 files changed, 15 insertions, 5 deletions

diff --git a/src/mongo/db/commands/feature_compatibility_version.cpp b/src/mongo/db/commands/feature_compatibility_version.cpp
index 7798cd2d2a6..78b2f6321af 100644
--- a/src/mongo/db/commands/feature_compatibility_version.cpp
+++ b/src/mongo/db/commands/feature_compatibility_version.cpp
@@ -421,7 +421,7 @@ void FeatureCompatibilityVersion::initializeForStartup(OperationContext* opCtx)
     invariant(opCtx->lockState()->isW());
     auto featureCompatibilityVersion = findFeatureCompatibilityVersionDocument(opCtx);
     if (!featureCompatibilityVersion) {
-        LOGV2(5853303, "featureCompatibilityVersion document missing at startup");
+        FeatureCompatibilityVersion::logFCVWithContext("startup"_sd);
         return;
     }
 
@@ -448,10 +448,7 @@ void FeatureCompatibilityVersion::initializeForStartup(OperationContext* opCtx)
     serverGlobalParams.mutableFeatureCompatibility.setVersion(version);
     FeatureCompatibilityVersion::updateMinWireVersion();
 
-    LOGV2(5853300,
-          "Intializing featureCompatibilityVersion at startup",
-          "featureCompatibilityVersion"_attr =
-              multiversion::toString(serverGlobalParams.featureCompatibility.getVersion()));
+    FeatureCompatibilityVersion::logFCVWithContext("startup"_sd);
 
     // On startup, if the version is in an upgrading or downgrading state, print a warning.
     if (serverGlobalParams.featureCompatibility.isUpgradingOrDowngrading()) {
@@ -520,6 +517,19 @@ void FeatureCompatibilityVersion::clearLastFCVUpdateTimestamp() {
     lastFCVUpdateTimestamp = Timestamp();
 }
 
+void FeatureCompatibilityVersion::logFCVWithContext(StringData context) {
+    LOGV2_OPTIONS(
+        5853300,
+        {logv2::LogComponent::kReplication},
+        "current featureCompatibilityVersion value",
+        "featureCompatibilityVersion"_attr =
+            serverGlobalParams.featureCompatibility.isVersionInitialized()
+            ? multiversion::toString(serverGlobalParams.featureCompatibility.getVersion())
+            : multiversion::toString(
+                  multiversion::FeatureCompatibilityVersion::kUnsetDefaultLastLTSBehavior),
+        "context"_attr = context);
+}
+
 
 /**
  * Read-only server parameter for featureCompatibilityVersion.