SERVER-17250 Verify logOp listeners are rollback-safe

1 files changed, 46 insertions, 0 deletions

diff --git a/jstests/noPassthroughWithMongod/logop_rollback.js b/jstests/noPassthroughWithMongod/logop_rollback.js
new file mode 100644
index 00000000000..cc585c59a8e
--- /dev/null
+++ b/jstests/noPassthroughWithMongod/logop_rollback.js
@@ -0,0 +1,46 @@
+//
+// Test that we neither rollback logOp nor crash when a WriteUnitOfWork attempts to rollback
+//
+(function() {
+    'use strict';
+
+    function checkForLogOpRollback(coll) {
+        var res = coll.runCommand({ getLog: 'global' });
+        assert.commandWorked(res);
+
+        for (var i = res.log.length - 1; i >= 0; i--) {
+            if (/custom rollback.*logop/i.test(res.log[i])) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    var coll = db.getSiblingDB('admin').system.roles;
+
+    //
+    // SERVER-17250 -- logOp rollback after triggering a
+    // "key too large to index" exception
+    //
+    var prevVerbosityLevel = db.getLogComponents().verbosity;
+    var prevWriteMode = db.getMongo().writeMode();
+    try {
+        // we need a verbosity level of at least 2 to see rollbacks in the logs
+        db.setLogLevel(2);
+
+        // must be in 'legacy' or 'compatibility' mode
+        db.getMongo().forceWriteMode('compatibility');
+        var res = coll.insert({ _id: new Array(1025).join('x') });
+
+        assert(res.hasWriteError());
+        // ErrorCodes::KeyTooLong == 17280
+        assert.eq(17280, res.getWriteError().code);
+
+        assert(checkForLogOpRollback(coll));
+    }
+    finally {
+        db.getMongo().forceWriteMode(prevWriteMode);
+        db.setLogLevel(prevVerbosityLevel);
+    }
+
+})();