Revert "SERVER-37498 remove slowBackgroundIndexBuild failpoint"

This reverts commit 4a0e4f7f0eeeda0b5a0ef6f1867d7d144de329c0.

1 files changed, 7 insertions, 2 deletions

diff --git a/src/mongo/db/catalog/multi_index_block.cpp b/src/mongo/db/catalog/multi_index_block.cpp
index b736fe01000..3aff92152ba 100644
--- a/src/mongo/db/catalog/multi_index_block.cpp
+++ b/src/mongo/db/catalog/multi_index_block.cpp
@@ -76,6 +76,7 @@ const StringData kCommitReadyMembersFieldName = "commitReadyMembers"_sd;
 MONGO_FAIL_POINT_DEFINE(crashAfterStartingIndexBuild);
 MONGO_FAIL_POINT_DEFINE(hangAfterStartingIndexBuild);
 MONGO_FAIL_POINT_DEFINE(hangAfterStartingIndexBuildUnlocked);
+MONGO_FAIL_POINT_DEFINE(slowBackgroundIndexBuild);
 MONGO_FAIL_POINT_DEFINE(hangBeforeIndexBuildOf);
 MONGO_FAIL_POINT_DEFINE(hangAfterIndexBuildOf);
 
@@ -349,14 +350,18 @@ Status MultiIndexBlock::insertAllDocumentsInCollection() {
             if (_allowInterruption && !_opCtx->checkForInterruptNoAssert().isOK())
                 return _opCtx->checkForInterruptNoAssert();
 
-            if (!retries && PlanExecutor::ADVANCED != state) {
+            if (!(retries || PlanExecutor::ADVANCED == state) ||
+                MONGO_FAIL_POINT(slowBackgroundIndexBuild)) {
+                log() << "Hanging index build due to failpoint";
+                invariant(_allowInterruption);
+                sleepmillis(1000);
                 continue;
             }
 
             // Make sure we are working with the latest version of the document.
             if (objToIndex.snapshotId() != _opCtx->recoveryUnit()->getSnapshotId() &&
                 !_collection->findDoc(_opCtx, loc, &objToIndex)) {
-                // Document was deleted so don't index it.
+                // doc was deleted so don't index it.
                 retries = 0;
                 continue;
             }