1 files changed, 26 insertions, 11 deletions
diff --git a/src/mongo/db/pipeline/javascript_execution.cpp b/src/mongo/db/pipeline/javascript_execution.cpp
index f9ce429ba76..8b6d3bc6f9b 100644
--- a/src/mongo/db/pipeline/javascript_execution.cpp
+++ b/src/mongo/db/pipeline/javascript_execution.cpp
@@ -47,22 +47,37 @@ JsExecution* JsExecution::get(OperationContext* opCtx,
                               StringData database,
                               bool loadStoredProcedures,
                               boost::optional<int> jsHeapLimitMB) {
+    // If a JsExecution object has already been created, return it.
+    JsExecution* jsExec = getCached(opCtx, loadStoredProcedures);
+    if (jsExec) {
+        return jsExec;
+    }
+
+    // There is no cached JsExecution object, so create and cache one now.
     auto& exec = getExec(opCtx);
-    if (!exec) {
-        exec = std::make_unique<JsExecution>(opCtx, scope, jsHeapLimitMB);
-        exec->getScope()->setLocalDB(database);
-        if (loadStoredProcedures) {
-            exec->getScope()->loadStored(opCtx, true);
-        }
-        exec->_storedProceduresLoaded = loadStoredProcedures;
-    } else {
-        uassert(31438,
-                "A single operation cannot use both JavaScript aggregation expressions and $where.",
-                loadStoredProcedures == exec->_storedProceduresLoaded);
+    exec = std::make_unique<JsExecution>(opCtx, scope, jsHeapLimitMB);
+    exec->getScope()->setLocalDB(database);
+    if (loadStoredProcedures) {
+        exec->getScope()->loadStored(opCtx, true);
     }
+    exec->_storedProceduresLoaded = loadStoredProcedures;
+
     return exec.get();
 }
 
+JsExecution* JsExecution::getCached(OperationContext* opCtx, bool loadStoredProcedures) {
+    auto& exec = getExec(opCtx);
+    if (exec) {
+        if (loadStoredProcedures == exec->_storedProceduresLoaded) {
+            return exec.get();
+        }
+        tasserted(
+            9136200,
+            "A single operation cannot use both JavaScript aggregation expressions and $where.");
+    }
+    return nullptr;
+}
+
 Value JsExecution::callFunction(ScriptingFunction func,
                                 const BSONObj& params,
                                 const BSONObj& thisObj) {