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/**
* Assert that arbiters periodically clear out their logical session cache. Inability to do so
* prohibits new clients from connecting.
*
* @tags: [requires_replication]
*/
(function() {
const name = "server54064";
const replSet = new ReplSetTest({
name: name,
nodes: 2,
// `disableLogicalSessionCacheRefresh` is true by default, but is disabled for testing purposes
// in servers spawned from the shell.
nodeOptions: {
setParameter: {
// Each refresh on an arbiter will empty the cache.
logicalSessionRefreshMillis: 10000,
// The number of connections/sessions before the cache is full, prohibiting new clients
// from connecting.
maxSessions: 3,
disableLogicalSessionCacheRefresh: false
}
}
});
const nodes = replSet.nodeList();
replSet.startSet();
replSet.initiate({
_id: name,
members: [{_id: 0, host: nodes[0]}, {_id: 1, host: nodes[1], arbiterOnly: true}],
});
let arbConn = replSet.getArbiter();
assert.soon(() => {
// Connect to mongo in a tight loop to exhaust the number of available logical sessions in the
// cache.
const result = new Mongo(arbConn.host).adminCommand({hello: 1});
if (result['ok'] === 0) {
assert.commandFailedWithCode(result, ErrorCodes.TooManyLogicalSessions);
return true;
}
return false;
});
assert.soon(() => {
// Once we observe that the number of sessions is maxed out, loop again to confirm that the
// cache eventually does get cleared.
const result = new Mongo(arbConn.host).adminCommand({hello: 1});
if (result['ok'] === 0) {
assert.commandFailedWithCode(result, ErrorCodes.TooManyLogicalSessions);
return false;
}
return true;
});
replSet.stopSet();
})();
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