SERVER-42154 add hangAfterInitializingIndexBuild fail point to IndexBuildsCoordinatorMongod

This fail point supports index build tests that step down/get interrupted as the createIndexes
command and transferring control over to the IndexBuildsCoordinatorMongod's thread pool.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/mongo/db/index_builds_coordinator_mongod.cpp b/src/mongo/db/index_builds_coordinator_mongod.cpp
index 4fb8274a640..8d71eed1d16 100644
--- a/src/mongo/db/index_builds_coordinator_mongod.cpp
+++ b/src/mongo/db/index_builds_coordinator_mongod.cpp
@@ -40,6 +40,7 @@
 #include "mongo/db/operation_context.h"
 #include "mongo/db/service_context.h"
 #include "mongo/util/assert_util.h"
+#include "mongo/util/fail_point.h"
 #include "mongo/util/log.h"
 #include "mongo/util/str.h"
 
@@ -49,6 +50,8 @@ using namespace indexbuildentryhelpers;
 
 namespace {
 
+MONGO_FAIL_POINT_DEFINE(hangAfterInitializingIndexBuild);
+
 /**
  * Constructs the options for the loader thread pool.
  */
@@ -179,6 +182,8 @@ IndexBuildsCoordinatorMongod::startIndexBuild(OperationContext* opCtx,
             return;
         }
 
+        MONGO_FAIL_POINT_PAUSE_WHILE_SET(hangAfterInitializingIndexBuild);
+
         auto opCtx = Client::getCurrent()->makeOperationContext();
 
         opCtx->setDeadlineByDate(deadline, timeoutError);