void ParallelSortClusteredCursor::setupVersionAndHandleSlaveOk(
OperationContext* txn,
PCStatePtr state,
const ShardId& shardId,
std::shared_ptr<Shard> primary,
const NamespaceString& ns,
const string& vinfo,
std::shared_ptr<ChunkManager> manager) {
if (manager) {
state->manager = manager;
} else if (primary) {
state->primary = primary;
}
verify(!primary || shardId == primary->getId());
// Setup conn
if (!state->conn) {
const auto shard = uassertStatusOK(Grid::get(txn)->shardRegistry()->getShard(txn, shardId));
state->conn.reset(new ShardConnection(shard->getConnString(), ns.ns(), manager));
}
const DBClientBase* rawConn = state->conn->getRawConn();
bool allowShardVersionFailure = rawConn->type() == ConnectionString::SET &&
DBClientReplicaSet::isSecondaryQuery(_qSpec.ns(), _qSpec.query(), _qSpec.options());
// Skip shard version checking if primary is known to be down.
if (allowShardVersionFailure) {
const DBClientReplicaSet* replConn = dynamic_cast<const DBClientReplicaSet*>(rawConn);
invariant(replConn);
ReplicaSetMonitorPtr rsMonitor = ReplicaSetMonitor::get(replConn->getSetName());
uassert(16388,
str::stream() << "cannot access unknown replica set: " << replConn->getSetName(),
rsMonitor != nullptr);
if (!rsMonitor->isKnownToHaveGoodPrimary()) {
state->conn->donotCheckVersion();
// A side effect of this short circuiting is the mongos will not be able figure out
// that the primary is now up on it's own and has to rely on other threads to refresh
// node states.
OCCASIONALLY {
const DBClientReplicaSet* repl = dynamic_cast<const DBClientReplicaSet*>(rawConn);
dassert(repl);
warning() << "Primary for " << repl->getServerAddress()
<< " was down before, bypassing setShardVersion."
<< " The local replica set view and targeting may be stale.";
}
return;
}
}
