SERVER-14431 Invalid chunk data after splitting on a key that's too large to index

1 files changed, 34 insertions, 0 deletions

diff --git a/jstests/sharding/split_large_key.js b/jstests/sharding/split_large_key.js
new file mode 100644
index 00000000000..5184a120ad6
--- /dev/null
+++ b/jstests/sharding/split_large_key.js
@@ -0,0 +1,34 @@
+// Test for splitting a chunk with a very large shard key value should not be allowed
+// and does not corrupt the config.chunks metadata.
+
+var st = new ShardingTest({ shards: 1 });
+var configDB = st.s.getDB('config');
+
+configDB.adminCommand({ enableSharding: 'test' });
+configDB.adminCommand({ shardCollection: 'test.user', key: { x: 1 }});
+
+var str1k = new Array(512).join('a');
+var res = configDB.adminCommand({ split: 'test.user', middle: { x: str1k }});
+assert(!res.ok);
+assert(res.errmsg != null);
+
+// Verify chunk document
+assert.eq(1, configDB.chunks.find().count());
+var chunkDoc = configDB.chunks.findOne();
+assert.eq(0, bsonWoCompare(chunkDoc.min, { x: MinKey }));
+assert.eq(0, bsonWoCompare(chunkDoc.max, { x: MaxKey }));
+
+configDB.adminCommand({ shardCollection: 'test.user2', key: { x: 1, y: 1 }});
+var strHalfk = new Array(256).join('a');
+res = configDB.adminCommand({ split: 'test.user2', middle: { x: strHalfk, y: strHalfk }});
+assert(!res.ok);
+assert(res.errmsg != null);
+
+// Verify chunk document
+assert.eq(1, configDB.chunks.find({ ns: 'test.user2' }).count());
+chunkDoc = configDB.chunks.findOne({ ns: 'test.user2' });
+assert.eq(0, bsonWoCompare(chunkDoc.min, { x: MinKey, y: MinKey }));
+assert.eq(0, bsonWoCompare(chunkDoc.max, { x: MaxKey, y: MaxKey }));
+
+st.stop();
+