rs make test better

1 files changed, 25 insertions, 0 deletions

diff --git a/jstests/replsets/rollback.js b/jstests/replsets/rollback.js
index f072d61b67c..46944069487 100644
--- a/jstests/replsets/rollback.js
+++ b/jstests/replsets/rollback.js
@@ -72,6 +72,31 @@ doTest = function (signal) {
     // Wait for initial replication

     var a = a_conn.getDB("foo");

     var b = b_conn.getDB("foo");

+

+    /* force the oplog to roll */

+    if (new Date() % 2 == 0) {

+        print("ROLLING OPLOG AS PART OF TEST (we only do this sometimes)");

+        var pass = 1;

+        var first = a.getSisterDB("local").oplog.rs.find().sort({ $natural: 1 }).limit(1)[0];

+        a.roll.insert({ x: 1 });

+        while (1) {

+            for (var i = 0; i < 10000; i++)

+                a.roll.update({}, { $inc: { x: 1} });

+            var op = a.getSisterDB("local").oplog.rs.find().sort({ $natural: 1 }).limit(1)[0];

+            if (tojson(op.h) != tojson(first.h)) {

+                printjson(op);

+                printjson(first);

+                break;

+            }

+            pass++;

+            a.getLastError(2); // unlikely secondary isn't keeping up, but let's avoid possible intermittent issues with that.

+        }

+        print("PASSES FOR OPLOG ROLL: " + pass);

+    }

+    else {

+        print("NO ROLL");

+    }

+

     a.bar.insert({ q: 1, a: "foo" });

     a.bar.insert({ q: 2, a: "foo", x: 1 });

     a.bar.insert({ q: 3, bb: 9, a: "foo" });