SERVER-43988 shutdown with {force: false} lists active index builds

3 files changed, 26 insertions, 0 deletions

diff --git a/src/mongo/db/commands/shutdown_d.cpp b/src/mongo/db/commands/shutdown_d.cpp
index b6d8154c999..67e5572125d 100644
--- a/src/mongo/db/commands/shutdown_d.cpp
+++ b/src/mongo/db/commands/shutdown_d.cpp
@@ -34,7 +34,9 @@
 #include <string>
 
 #include "mongo/db/commands/shutdown.h"
+#include "mongo/db/index_builds_coordinator.h"
 #include "mongo/db/repl/replication_coordinator.h"
+#include "mongo/util/log.h"
 
 namespace mongo {
 namespace {
@@ -61,6 +63,13 @@ public:
             timeoutSecs = cmdObj["timeoutSecs"].numberLong();
         }
 
+        if (!force) {
+            auto indexBuildsCoord = IndexBuildsCoordinator::get(opCtx);
+            auto numIndexBuilds = indexBuildsCoord->getActiveIndexBuildCount(opCtx);
+            log() << "Index builds in progress while processing shutdown command: "
+                  << numIndexBuilds;
+        }
+
         try {
             repl::ReplicationCoordinator::get(opCtx)->stepDown(
                 opCtx, force, Seconds(timeoutSecs), Seconds(120));
diff --git a/src/mongo/db/index_builds_coordinator.cpp b/src/mongo/db/index_builds_coordinator.cpp
index eda59265217..8779a50c857 100644
--- a/src/mongo/db/index_builds_coordinator.cpp
+++ b/src/mongo/db/index_builds_coordinator.cpp
@@ -694,6 +694,16 @@ bool containsUniqueIndexes(const std::vector<BSONObj>& specs) {
 }
 }  // namespace
 
+std::size_t IndexBuildsCoordinator::getActiveIndexBuildCount(OperationContext* opCtx) {
+    auto indexBuilds = _getIndexBuilds();
+    // We use forEachIndexBuild() to log basic details on the current index builds and don't intend
+    // to modify any of the index builds, hence the no-op.
+    auto onIndexBuild = [](std::shared_ptr<ReplIndexBuildState> replState) {};
+    forEachIndexBuild(indexBuilds, "index build still running: "_sd, onIndexBuild);
+
+    return indexBuilds.size();
+}
+
 void IndexBuildsCoordinator::onStepUp(OperationContext* opCtx) {
     log() << "IndexBuildsCoordinator::onStepUp - this node is stepping up to primary";
 
diff --git a/src/mongo/db/index_builds_coordinator.h b/src/mongo/db/index_builds_coordinator.h
index 042c172ebca..99f0772b507 100644
--- a/src/mongo/db/index_builds_coordinator.h
+++ b/src/mongo/db/index_builds_coordinator.h
@@ -247,6 +247,13 @@ public:
     bool abortIndexBuildByBuildUUIDNoWait(OperationContext* opCtx,
                                           const UUID& buildUUID,
                                           const std::string& reason);
+    /**
+     * Returns number of index builds in process.
+     *
+     * Invoked when the node is processing a shutdown command, an admin command that is
+     * used to shut down the server gracefully.
+     */
+    std::size_t getActiveIndexBuildCount(OperationContext* opCtx);
 
     /**
      * Invoked when the node enters the primary state.