SERVER-67537 Add logging to allow TransactionRouterResourceYielder to be debugged

1 files changed, 13 insertions, 0 deletions

diff --git a/src/mongo/s/transaction_router_resource_yielder.cpp b/src/mongo/s/transaction_router_resource_yielder.cpp
index b0621f1792d..a5bfea59878 100644
--- a/src/mongo/s/transaction_router_resource_yielder.cpp
+++ b/src/mongo/s/transaction_router_resource_yielder.cpp
@@ -30,10 +30,13 @@
 #include "mongo/s/transaction_router_resource_yielder.h"
 
 #include "mongo/db/session_catalog.h"
+#include "mongo/logv2/log.h"
 #include "mongo/s/is_mongos.h"
 #include "mongo/s/session_catalog_router.h"
 #include "mongo/util/exit.h"
 
+#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kTransaction
+
 namespace mongo {
 
 namespace {
@@ -57,6 +60,11 @@ TransactionRouterResourceYielder::makeForRemoteCommand() {
 void TransactionRouterResourceYielder::yield(OperationContext* opCtx) {
     Session* const session = OperationContextSession::get(opCtx);
     if (session) {
+        LOGV2_DEBUG(6753700,
+                    5,
+                    "TransactionRouterResourceYielder yielding",
+                    "lsid"_attr = opCtx->getLogicalSessionId(),
+                    "txnNumber"_attr = opCtx->getTxnNumber());
         RouterOperationContextSession::checkIn(opCtx,
                                                OperationContextSession::CheckInReason::kYield);
     }
@@ -66,6 +74,11 @@ void TransactionRouterResourceYielder::yield(OperationContext* opCtx) {
 void TransactionRouterResourceYielder::unyield(OperationContext* opCtx) {
     if (_yielded) {
         hangBeforeUnyieldingTransactionRouter.pauseWhileSet();
+        LOGV2_DEBUG(6753701,
+                    5,
+                    "TransactionRouterResourceYielder unyielding",
+                    "lsid"_attr = opCtx->getLogicalSessionId(),
+                    "txnNumber"_attr = opCtx->getTxnNumber());
 
         // Code that uses the TransactionRouter assumes it will only run with it, so check back out
         // the session ignoring interruptions, except at global shutdown to prevent stalling