From 6350b1f9f11a8f4971f15859426a0c991be39205 Mon Sep 17 00:00:00 2001
From: Nathan Myers <nathan.myers@10gen.com>
Date: Mon, 19 Sep 2016 13:59:06 -0400
Subject: SERVER-25009 when ReplicaSetMonitor::get() fails, report name

---
 src/mongo/client/parallel.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mongo/client/parallel.cpp b/src/mongo/client/parallel.cpp
index f4a89a9e45b..26ebcea0582 100644
--- a/src/mongo/client/parallel.cpp
+++ b/src/mongo/client/parallel.cpp
@@ -410,7 +410,9 @@ void ParallelSortClusteredCursor::setupVersionAndHandleSlaveOk(
         const DBClientReplicaSet* replConn = dynamic_cast<const DBClientReplicaSet*>(rawConn);
         invariant(replConn);
         ReplicaSetMonitorPtr rsMonitor = ReplicaSetMonitor::get(replConn->getSetName());
-        uassert(16388, "cannot access unknown replica set:", rsMonitor != nullptr);
+        uassert(16388,
+                str::stream() << "cannot access unknown replica set: " << replConn->getSetName(),
+                rsMonitor != nullptr);
         if (!rsMonitor->isKnownToHaveGoodPrimary()) {
             state->conn->donotCheckVersion();
 
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