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/**
* Verify that a current mongos, when connected to an old mongod (one that
* implements a different wire-protocol version) reports the resulting failures
* properly.
*
* Note that the precise errors and failure modes caught here are not documented,
* and are not depended upon by deployed systems. If improved error handling
* results in this test failing, this test may be updated to reflect the actual
* error reported.
*/
// Checking UUID consistency involves talking to a shard node, which in this test is shutdown
TestData.skipCheckingUUIDsConsistentAcrossCluster = true;
(function() {
'use strict';
/* Start a ShardingTest with a 'last-stable' mongos so that a 'last-stable'
* shard can be added. (A 'last-stable' shard cannot be added from a
* current mongos because the wire protocol must be presumed different.)
*/
var st = new ShardingTest({
shards: 1,
other: {mongosOptions: {binVersion: 'last-stable'}, shardOptions: {binVersion: 'last-stable'}}
});
assert.commandWorked(st.s.adminCommand({enableSharding: 'test'}));
assert.commandWorked(st.s.adminCommand({shardCollection: 'test.foo', key: {x: 1}}));
// Start a current-version mongos.
var newMongos = MongoRunner.runMongos({configdb: st._configDB});
// Write commands report failure by returning writeError:
// TODO: SERVER-43835 ReplicaSetMonitor converts all failed host errors to
// FailedToSatisfyReadPreference. ReplicaSetMonitor just keeps retrying after
// IncompatibleServerVersion errors and eventually fails with FailedToSatisfyReadPreference.
assert.writeErrorWithCode(newMongos.getDB('test').foo.insert({x: 1}),
ErrorCodes.FailedToSatisfyReadPreference);
assert.writeErrorWithCode(newMongos.getDB('test').foo.update({x: 1}, {x: 1, y: 2}),
ErrorCodes.FailedToSatisfyReadPreference);
assert.writeErrorWithCode(newMongos.getDB('test').foo.remove({x: 1}),
ErrorCodes.FailedToSatisfyReadPreference);
// Query commands, on failure, throw instead:
let res;
// TODO: SERVER-43835 ReplicaSetMonitor converts all failed host errors to
// FailedToSatisfyReadPreference.
res = newMongos.getDB('test').runCommand({find: 'foo'});
assert.eq(res.code, ErrorCodes.FailedToSatisfyReadPreference);
res = newMongos.getDB('test').runCommand({find: 'foo', filter: {x: 1}});
assert.eq(res.code, ErrorCodes.FailedToSatisfyReadPreference);
res = newMongos.getDB('test').runCommand({aggregate: 'foo', pipeline: [], cursor: {}});
assert.eq(res.code, ErrorCodes.FailedToSatisfyReadPreference);
MongoRunner.stopMongos(newMongos);
st.stop();
})();
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