SERVER-16878 Add extra diagnostics to help debug stepdown.js test failure

1 files changed, 9 insertions, 1 deletions

diff --git a/jstests/replsets/stepdown.js b/jstests/replsets/stepdown.js
index 564ab0a3099..1aec871f959 100644
--- a/jstests/replsets/stepdown.js
+++ b/jstests/replsets/stepdown.js
@@ -112,8 +112,16 @@ config.version++;
 config.members.push({_id: 2,
                      host: getHostName()+":"+replTest.ports[replTest.ports.length-1],
                      arbiterOnly:true});
+try {
+    reconfig(replTest, config);
+} catch (x) {
+    // SERVER-16878 Print the last few oplog entries of the secondary to aid debugging
+    var oplog1 = replTest.nodes[1].getDB('local').oplog.rs.find().sort({'$natural':-1}).limit(3);
+    print("Node 1 oplog: " + tojson(oplog1.toArray()));
+
+    throw x;
+}
 
-reconfig(replTest, config);
 
 print("\ncheck shutdown command");