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/**
* Tests that DBClientRS doesn't do any re-targeting on replica set member state changes until it
* sees a "not master" error response from a command.
* @tags: [requires_replication]
*/
(function() {
"use strict";
const rst = new ReplSetTest({nodes: 1});
rst.startSet();
rst.initiate();
const directConn = rst.getPrimary();
const rsConn = new Mongo(rst.getURL());
assert(rsConn.isReplicaSetConnection(),
"expected " + rsConn.host + " to be a replica set connection string");
function stepDownPrimary(rst) {
const awaitShell = startParallelShell(
() => assert.commandWorked(db.adminCommand({replSetStepDown: 60, force: true})),
directConn.port);
// We wait for the primary to transition to the SECONDARY state to ensure we're waiting
// until after the parallel shell has started the replSetStepDown command and the server is
// paused at the failpoint. Do not attempt to reconnect to the node, since the node will be
// holding the global X lock at the failpoint.
const reconnectNode = false;
rst.waitForState(directConn, ReplSetTest.State.SECONDARY, null, reconnectNode);
return awaitShell;
}
const failpoint = "stepdownHangBeforePerformingPostMemberStateUpdateActions";
assert.commandWorked(
directConn.adminCommand({configureFailPoint: failpoint, mode: "alwaysOn"}));
const awaitShell = stepDownPrimary(rst);
const error = assert.throws(function() {
// DBClientRS will continue to send command requests to the node it believed to be primary
// even after it stepped down so long as it hasn't closed its connection. But this may also
// throw if the ReplicaSetMonitor's backgroud refresh has already noticed that this node is
// no longer primary.
assert.commandFailedWithCode(rsConn.getDB("test").runCommand({find: "mycoll"}),
ErrorCodes.NotMasterNoSlaveOk);
// However, once the server responds back with a "not master" error, DBClientRS will cause
// the ReplicaSetMonitor to attempt to discover the current primary, which will cause this
// to definitely throw.
rsConn.getDB("test").runCommand({find: "mycoll"});
});
assert(/Could not find host/.test(error.toString()),
"find command failed for a reason other than being unable to discover a new primary: " +
tojson(error));
try {
assert.commandWorked(directConn.adminCommand({configureFailPoint: failpoint, mode: "off"}));
} catch (e) {
if (!isNetworkError(e)) {
throw e;
}
// We ignore network errors because it's possible that depending on how quickly the server
// closes connections that the connection would get closed before the server has a chance to
// respond to the configureFailPoint command with ok=1.
}
awaitShell();
rst.stopSet();
})();
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