[SERVER-11104] cleanupOrphaned doesn't verify startingFromKey matches shard key spec - MongoDB

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Steps To Reproduce:

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var st = new ShardingTest({

    other: {

        rs: true,

        rsOptions: {nodes: 2}

});

var mongos = st.s0;

var coll = mongos.getCollection('foo.bar');

var shardAdmin = st.shard0.getDB('admin');

mongosAdmin.runCommand({

    enableSharding: coll.getDB().getName()

});

mongosAdmin.runCommand({

    shardCollection: coll.getFullName(),

    key: {_id: 1}

});

// Doesn't match number of keys.

assert.commandFailed(shardAdmin.runCommand({

    cleanupOrphaned: coll.getFullName(),

    startingFromKey: {someKey: 'someValue', someOtherKey: 1}

}));

// Matches number of keys but not key name. This will succeed but should fail.

assert.commandFailed(shardAdmin.runCommand({

    cleanupOrphaned: coll.getFullName(),

    startingFromKey: {someKey: 'someValue'}

}));

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The cleanupOrphaned command only checks that the startingFromKey parameter has the same number of fields as the shard key, not that the fields match.

is related to

SERVER-8598 Add command to cleanup orphaned data created by failed chunk migrations