void ClusterCursorManager::shutdown() {
stdx::unique_lock<stdx::mutex> lk(_mutex);
_inShutdown = true;
lk.unlock();
killAllCursors();
reapZombieCursors();
}
std::vector<DocumentSourceMergeCursors::CursorDescriptor> ClusterAggregate::parseCursors(
const std::vector<Strategy::CommandResult>& shardResults) {
try {
std::vector<DocumentSourceMergeCursors::CursorDescriptor> cursors;
for (size_t i = 0; i < shardResults.size(); i++) {
BSONObj result = shardResults[i].result;
if (!result["ok"].trueValue()) {
// If the failure of the sharded command can be accounted to a single error,
// throw a UserException with that error code; otherwise, throw with a
// location uassert code.
int errCode = getUniqueCodeFromCommandResults(shardResults);
if (errCode == 0) {
errCode = 17022;
}
invariant(errCode == result["code"].numberInt() || errCode == 17022);
uasserted(errCode,
str::stream() << "sharded pipeline failed on shard "
<< shardResults[i].shardTargetId
<< ": "
<< result.toString());
}
BSONObj cursor = result["cursor"].Obj();
massert(17023,
str::stream() << "shard " << shardResults[i].shardTargetId
<< " returned non-empty first batch",
cursor["firstBatch"].Obj().isEmpty());
massert(17024,
str::stream() << "shard " << shardResults[i].shardTargetId
<< " returned cursorId 0",
cursor["id"].Long() != 0);
massert(17025,
str::stream() << "shard " << shardResults[i].shardTargetId
<< " returned invalid ns: "
<< cursor["ns"],
NamespaceString(cursor["ns"].String()).isValid());
cursors.emplace_back(
shardResults[i].target, cursor["ns"].String(), cursor["id"].Long());
}
return cursors;
} catch (...) {
// Need to clean up any cursors we successfully created on the shards
killAllCursors(shardResults);
throw;
}
}
