SERVER-37451 Move all ClientCursor ownership to the global CursorManager.

Deleting the per-collection CursorManagers, and other
related cleanup, is left as future work.

1 files changed, 37 insertions, 0 deletions

diff --git a/jstests/noPassthroughWithMongod/captrunc_cursor_invalidation.js b/jstests/noPassthroughWithMongod/captrunc_cursor_invalidation.js
new file mode 100644
index 00000000000..3b1f7337133
--- /dev/null
+++ b/jstests/noPassthroughWithMongod/captrunc_cursor_invalidation.js
@@ -0,0 +1,37 @@
+// Test that when a capped collection is truncated, tailable cursors die on getMore with the error
+// code 'CappedPositionLost'.
+//
+// @tags: [requires_capped]
+(function() {
+    "use strict";
+
+    const coll = db.captrunc_cursor_invalidation;
+    coll.drop();
+
+    // Create a capped collection with four documents.
+    assert.commandWorked(db.createCollection(coll.getName(), {capped: true, size: 1024}));
+    const numDocs = 4;
+    const bulk = coll.initializeUnorderedBulkOp();
+    for (let i = 0; i < numDocs; ++i) {
+        bulk.insert({_id: i});
+    }
+    assert.commandWorked(bulk.execute());
+
+    // Open a tailable cursor against the capped collection.
+    const findRes = assert.commandWorked(db.runCommand({find: coll.getName(), tailable: true}));
+    assert.neq(findRes.cursor.id, 0);
+    assert.eq(findRes.cursor.ns, coll.getFullName());
+    assert.eq(findRes.cursor.firstBatch.length, 4);
+    const cursorId = findRes.cursor.id;
+
+    // Truncate the capped collection so that the cursor's position no longer exists.
+    assert.commandWorked(db.runCommand({captrunc: coll.getName(), n: 2}));
+
+    // A subsequent getMore should fail with 'CappedPositionLost'.
+    assert.commandFailedWithCode(db.runCommand({getMore: cursorId, collection: coll.getName()}),
+                                 ErrorCodes.CappedPositionLost);
+
+    // The cursor has now been destroyed, so another getMore should fail with 'CursorNotFound'.
+    assert.commandFailedWithCode(db.runCommand({getMore: cursorId, collection: coll.getName()}),
+                                 ErrorCodes.CursorNotFound);
+}());