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-rw-r--r--src/mongo/db/dbcommands.cpp8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mongo/db/dbcommands.cpp b/src/mongo/db/dbcommands.cpp
index 9d26180677e..a89bb5ac73e 100644
--- a/src/mongo/db/dbcommands.cpp
+++ b/src/mongo/db/dbcommands.cpp
@@ -1426,14 +1426,22 @@ bool Command::run(OperationContext* txn,
return result;
}
+ const int debugLevel =
+ serverGlobalParams.clusterRole == ClusterRole::ConfigServer ? 1 : 2;
+ LOG(debugLevel) << "Waiting for 'committed' snapshot to be available for reading: "
+ << readConcernArgs;
Status status = txn->recoveryUnit()->setReadFromMajorityCommittedSnapshot();
// Wait until a snapshot is available.
while (status == ErrorCodes::ReadConcernMajorityNotAvailableYet) {
+ LOG(debugLevel)
+ << "Snapshot not available for readConcern: " << readConcernArgs;
replCoord->waitUntilSnapshotCommitted(txn, SnapshotName::min());
status = txn->recoveryUnit()->setReadFromMajorityCommittedSnapshot();
}
+ LOG(debugLevel) << "Using 'committed' snapshot. " << CurOp::get(txn)->query();
+
if (!status.isOK()) {
auto result = appendCommandStatus(inPlaceReplyBob, status);
inPlaceReplyBob.doneFast();