1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
|
/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
#include "mongo/platform/basic.h"
#include <boost/optional.hpp>
#include "mongo/base/init.h"
#include "mongo/base/initializer.h"
#include "mongo/base/status.h"
#include "mongo/client/connpool.h"
#include "mongo/client/dbclient_rs.h"
#include "mongo/client/global_conn_pool.h"
#include "mongo/client/remote_command_targeter.h"
#include "mongo/client/remote_command_targeter_factory_impl.h"
#include "mongo/client/replica_set_monitor.h"
#include "mongo/config.h"
#include "mongo/db/audit.h"
#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/auth/authz_manager_external_state_s.h"
#include "mongo/db/auth/user_cache_invalidator_job.h"
#include "mongo/db/client.h"
#include "mongo/db/ftdc/ftdc_mongos.h"
#include "mongo/db/initialize_server_global_state.h"
#include "mongo/db/initialize_server_security_state.h"
#include "mongo/db/kill_sessions.h"
#include "mongo/db/lasterror.h"
#include "mongo/db/log_process_details.h"
#include "mongo/db/logical_clock.h"
#include "mongo/db/logical_session_cache_factory_mongos.h"
#include "mongo/db/logical_time_metadata_hook.h"
#include "mongo/db/logical_time_validator.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/server_options.h"
#include "mongo/db/service_context.h"
#include "mongo/db/session_killer.h"
#include "mongo/db/startup_warnings_common.h"
#include "mongo/db/wire_version.h"
#include "mongo/executor/task_executor_pool.h"
#include "mongo/platform/process_id.h"
#include "mongo/rpc/metadata/egress_metadata_hook_list.h"
#include "mongo/s/balancer_configuration.h"
#include "mongo/s/catalog_cache.h"
#include "mongo/s/client/shard_connection.h"
#include "mongo/s/client/shard_factory.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/client/shard_remote.h"
#include "mongo/s/client/sharding_connection_hook.h"
#include "mongo/s/commands/kill_sessions_remote.h"
#include "mongo/s/committed_optime_metadata_hook.h"
#include "mongo/s/config_server_catalog_cache_loader.h"
#include "mongo/s/grid.h"
#include "mongo/s/is_mongos.h"
#include "mongo/s/mongos_options.h"
#include "mongo/s/query/cluster_cursor_cleanup_job.h"
#include "mongo/s/query/cluster_cursor_manager.h"
#include "mongo/s/service_entry_point_mongos.h"
#include "mongo/s/sharding_egress_metadata_hook_for_mongos.h"
#include "mongo/s/sharding_egress_metadata_hook_for_mongos.h"
#include "mongo/s/sharding_initialization.h"
#include "mongo/s/sharding_uptime_reporter.h"
#include "mongo/s/version_mongos.h"
#include "mongo/stdx/memory.h"
#include "mongo/stdx/thread.h"
#include "mongo/transport/transport_layer_manager.h"
#include "mongo/util/admin_access.h"
#include "mongo/util/cmdline_utils/censor_cmdline.h"
#include "mongo/util/concurrency/idle_thread_block.h"
#include "mongo/util/concurrency/thread_name.h"
#include "mongo/util/exception_filter_win32.h"
#include "mongo/util/exit.h"
#include "mongo/util/fast_clock_source_factory.h"
#include "mongo/util/log.h"
#include "mongo/util/net/socket_exception.h"
#include "mongo/util/net/socket_utils.h"
#include "mongo/util/net/ssl_manager.h"
#include "mongo/util/ntservice.h"
#include "mongo/util/options_parser/startup_options.h"
#include "mongo/util/periodic_runner.h"
#include "mongo/util/periodic_runner_factory.h"
#include "mongo/util/processinfo.h"
#include "mongo/util/quick_exit.h"
#include "mongo/util/signal_handlers.h"
#include "mongo/util/stacktrace.h"
#include "mongo/util/str.h"
#include "mongo/util/text.h"
#include "mongo/util/version.h"
namespace mongo {
using logger::LogComponent;
#if !defined(__has_feature)
#define __has_feature(x) 0
#endif
namespace {
#if defined(_WIN32)
const ntservice::NtServiceDefaultStrings defaultServiceStrings = {
L"MongoS", L"MongoDB Router", L"MongoDB Sharding Router"};
#endif
constexpr auto kSignKeysRetryInterval = Seconds{1};
boost::optional<ShardingUptimeReporter> shardingUptimeReporter;
Status waitForSigningKeys(OperationContext* opCtx) {
auto const shardRegistry = Grid::get(opCtx)->shardRegistry();
while (true) {
// This should be true when shard registry is up
invariant(shardRegistry->isUp());
auto configCS = shardRegistry->getConfigServerConnectionString();
auto rsm = ReplicaSetMonitor::get(configCS.getSetName());
// mongod will set minWireVersion == maxWireVersion for isMaster requests from
// internalClient.
if (rsm && (rsm->getMaxWireVersion() < WireVersion::SUPPORTS_OP_MSG)) {
log() << "Not waiting for signing keys, not supported by the config shard "
<< configCS.getSetName();
return Status::OK();
}
auto stopStatus = opCtx->checkForInterruptNoAssert();
if (!stopStatus.isOK()) {
return stopStatus;
}
try {
if (LogicalTimeValidator::get(opCtx)->shouldGossipLogicalTime()) {
return Status::OK();
}
log() << "Waiting for signing keys, sleeping for " << kSignKeysRetryInterval
<< " and trying again.";
sleepFor(kSignKeysRetryInterval);
continue;
} catch (const DBException& ex) {
Status status = ex.toStatus();
warning() << "Error waiting for signing keys, sleeping for " << kSignKeysRetryInterval
<< " and trying again " << causedBy(status);
sleepFor(kSignKeysRetryInterval);
continue;
}
}
}
/**
* NOTE: This function may be called at any time after registerShutdownTask is called below. It must
* not depend on the prior execution of mongo initializers or the existence of threads.
*/
void cleanupTask(ServiceContext* serviceContext) {
{
// This client initiation pattern is only to be used here, with plans to eliminate this
// pattern down the line.
if (!haveClient())
Client::initThread(getThreadName());
Client& client = cc();
// Shutdown the TransportLayer so that new connections aren't accepted
if (auto tl = serviceContext->getTransportLayer()) {
log(LogComponent::kNetwork) << "shutdown: going to close all sockets...";
tl->shutdown();
}
ServiceContext::UniqueOperationContext uniqueTxn;
OperationContext* opCtx = client.getOperationContext();
if (!opCtx) {
uniqueTxn = client.makeOperationContext();
opCtx = uniqueTxn.get();
}
opCtx->setIsExecutingShutdown();
if (serviceContext) {
serviceContext->setKillAllOperations();
// Shut down the background periodic task runner.
auto runner = serviceContext->getPeriodicRunner();
if (runner) {
runner->shutdown();
}
}
// Perform all shutdown operations after setKillAllOperations is called in order to ensure
// that any pending threads are about to terminate
if (auto validator = LogicalTimeValidator::get(serviceContext)) {
validator->shutDown();
}
if (auto cursorManager = Grid::get(opCtx)->getCursorManager()) {
cursorManager->shutdown(opCtx);
}
if (auto pool = Grid::get(opCtx)->getExecutorPool()) {
pool->shutdownAndJoin();
}
if (auto catalog = Grid::get(opCtx)->catalogClient()) {
catalog->shutDown(opCtx);
}
if (auto shardRegistry = Grid::get(opCtx)->shardRegistry()) {
shardRegistry->shutdown();
}
#if __has_feature(address_sanitizer)
// When running under address sanitizer, we get false positive leaks due to disorder around
// the lifecycle of a connection and request. When we are running under ASAN, we try a lot
// harder to dry up the server from active connections before going on to really shut down.
// Shut down the global dbclient pool so callers stop waiting for connections.
shardConnectionPool.shutdown();
// Shutdown the Service Entry Point and its sessions and give it a grace period to complete.
if (auto sep = serviceContext->getServiceEntryPoint()) {
if (!sep->shutdown(Seconds(10))) {
log(LogComponent::kNetwork)
<< "Service entry point failed to shutdown within timelimit.";
}
}
// Shutdown and wait for the service executor to exit
if (auto svcExec = serviceContext->getServiceExecutor()) {
Status status = svcExec->shutdown(Seconds(5));
if (!status.isOK()) {
log(LogComponent::kNetwork)
<< "Service executor failed to shutdown within timelimit: " << status.reason();
}
}
#endif
// Shutdown Full-Time Data Capture
stopMongoSFTDC();
}
audit::logShutdown(Client::getCurrent());
}
Status initializeSharding(OperationContext* opCtx) {
auto targeterFactory = stdx::make_unique<RemoteCommandTargeterFactoryImpl>();
auto targeterFactoryPtr = targeterFactory.get();
ShardFactory::BuilderCallable setBuilder =
[targeterFactoryPtr](const ShardId& shardId, const ConnectionString& connStr) {
return stdx::make_unique<ShardRemote>(
shardId, connStr, targeterFactoryPtr->create(connStr));
};
ShardFactory::BuilderCallable masterBuilder =
[targeterFactoryPtr](const ShardId& shardId, const ConnectionString& connStr) {
return stdx::make_unique<ShardRemote>(
shardId, connStr, targeterFactoryPtr->create(connStr));
};
ShardFactory::BuildersMap buildersMap{
{ConnectionString::SET, std::move(setBuilder)},
{ConnectionString::MASTER, std::move(masterBuilder)},
};
auto shardFactory =
stdx::make_unique<ShardFactory>(std::move(buildersMap), std::move(targeterFactory));
CatalogCacheLoader::set(opCtx->getServiceContext(),
stdx::make_unique<ConfigServerCatalogCacheLoader>());
Status status = initializeGlobalShardingState(
opCtx,
mongosGlobalParams.configdbs,
generateDistLockProcessId(opCtx),
std::move(shardFactory),
stdx::make_unique<CatalogCache>(CatalogCacheLoader::get(opCtx)),
[opCtx]() {
auto hookList = stdx::make_unique<rpc::EgressMetadataHookList>();
hookList->addHook(
stdx::make_unique<rpc::LogicalTimeMetadataHook>(opCtx->getServiceContext()));
hookList->addHook(
stdx::make_unique<rpc::CommittedOpTimeMetadataHook>(opCtx->getServiceContext()));
hookList->addHook(stdx::make_unique<rpc::ShardingEgressMetadataHookForMongos>(
opCtx->getServiceContext()));
return hookList;
},
boost::none);
if (!status.isOK()) {
return status;
}
status = waitForShardRegistryReload(opCtx);
if (!status.isOK()) {
return status;
}
status = waitForSigningKeys(opCtx);
if (!status.isOK()) {
return status;
}
Grid::get(opCtx)->setShardingInitialized();
return Status::OK();
}
void initWireSpec() {
WireSpec& spec = WireSpec::instance();
// Since the upgrade order calls for upgrading mongos last, it only needs to talk the latest
// wire version. This ensures that users will get errors if they upgrade in the wrong order.
spec.outgoing.minWireVersion = LATEST_WIRE_VERSION;
spec.outgoing.maxWireVersion = LATEST_WIRE_VERSION;
spec.isInternalClient = true;
}
ExitCode runMongosServer(ServiceContext* serviceContext) {
Client::initThread("mongosMain");
printShardingVersionInfo(false);
initWireSpec();
serviceContext->setServiceEntryPoint(
stdx::make_unique<ServiceEntryPointMongos>(serviceContext));
auto tl =
transport::TransportLayerManager::createWithConfig(&serverGlobalParams, serviceContext);
auto res = tl->setup();
if (!res.isOK()) {
error() << "Failed to set up listener: " << res;
return EXIT_NET_ERROR;
}
serviceContext->setTransportLayer(std::move(tl));
auto unshardedHookList = stdx::make_unique<rpc::EgressMetadataHookList>();
unshardedHookList->addHook(stdx::make_unique<rpc::LogicalTimeMetadataHook>(serviceContext));
unshardedHookList->addHook(
stdx::make_unique<rpc::ShardingEgressMetadataHookForMongos>(serviceContext));
// TODO SERVER-33053: readReplyMetadata is not called on hooks added through
// ShardingConnectionHook with _shardedConnections=false, so this hook will not run for
// connections using globalConnPool.
unshardedHookList->addHook(stdx::make_unique<rpc::CommittedOpTimeMetadataHook>(serviceContext));
// Add sharding hooks to both connection pools - ShardingConnectionHook includes auth hooks
globalConnPool.addHook(new ShardingConnectionHook(false, std::move(unshardedHookList)));
auto shardedHookList = stdx::make_unique<rpc::EgressMetadataHookList>();
shardedHookList->addHook(stdx::make_unique<rpc::LogicalTimeMetadataHook>(serviceContext));
shardedHookList->addHook(
stdx::make_unique<rpc::ShardingEgressMetadataHookForMongos>(serviceContext));
shardedHookList->addHook(stdx::make_unique<rpc::CommittedOpTimeMetadataHook>(serviceContext));
shardConnectionPool.addHook(new ShardingConnectionHook(true, std::move(shardedHookList)));
ReplicaSetMonitor::setAsynchronousConfigChangeHook(
&ShardRegistry::replicaSetChangeConfigServerUpdateHook);
ReplicaSetMonitor::setSynchronousConfigChangeHook(
&ShardRegistry::replicaSetChangeShardRegistryUpdateHook);
// Mongos connection pools already takes care of authenticating new connections so the
// replica set connection shouldn't need to.
DBClientReplicaSet::setAuthPooledSecondaryConn(false);
if (getHostName().empty()) {
quickExit(EXIT_BADOPTIONS);
}
auto opCtx = cc().makeOperationContext();
auto logicalClock = stdx::make_unique<LogicalClock>(opCtx->getServiceContext());
LogicalClock::set(opCtx->getServiceContext(), std::move(logicalClock));
{
Status status = initializeSharding(opCtx.get());
if (!status.isOK()) {
if (status == ErrorCodes::CallbackCanceled) {
invariant(globalInShutdownDeprecated());
log() << "Shutdown called before mongos finished starting up";
return EXIT_CLEAN;
}
error() << "Error initializing sharding system: " << status;
return EXIT_SHARDING_ERROR;
}
Grid::get(opCtx.get())
->getBalancerConfiguration()
->refreshAndCheck(opCtx.get())
.transitional_ignore();
}
startMongoSFTDC();
Status status = AuthorizationManager::get(serviceContext)->initialize(opCtx.get());
if (!status.isOK()) {
error() << "Initializing authorization data failed: " << status;
return EXIT_SHARDING_ERROR;
}
// Construct the sharding uptime reporter after the startup parameters have been parsed in order
// to ensure that it picks up the server port instead of reporting the default value.
shardingUptimeReporter.emplace();
shardingUptimeReporter->startPeriodicThread();
clusterCursorCleanupJob.go();
UserCacheInvalidator cacheInvalidatorThread(AuthorizationManager::get(serviceContext));
{
cacheInvalidatorThread.initialize(opCtx.get());
cacheInvalidatorThread.go();
}
PeriodicTask::startRunningPeriodicTasks();
// Set up the periodic runner for background job execution
auto runner = makePeriodicRunner(serviceContext);
runner->startup();
serviceContext->setPeriodicRunner(std::move(runner));
SessionKiller::set(serviceContext,
std::make_shared<SessionKiller>(serviceContext, killSessionsRemote));
// Set up the logical session cache
LogicalSessionCache::set(serviceContext, makeLogicalSessionCacheS());
status = serviceContext->getServiceExecutor()->start();
if (!status.isOK()) {
error() << "Failed to start the service executor: " << redact(status);
return EXIT_NET_ERROR;
}
status = serviceContext->getServiceEntryPoint()->start();
if (!status.isOK()) {
error() << "Failed to start the service entry point: " << redact(status);
return EXIT_NET_ERROR;
}
status = serviceContext->getTransportLayer()->start();
if (!status.isOK()) {
error() << "Failed to start the transport layer: " << redact(status);
return EXIT_NET_ERROR;
}
serviceContext->notifyStartupComplete();
#if !defined(_WIN32)
signalForkSuccess();
#else
if (ntservice::shouldStartService()) {
ntservice::reportStatus(SERVICE_RUNNING);
log() << "Service running";
}
#endif
// Block until shutdown.
MONGO_IDLE_THREAD_BLOCK;
return waitForShutdown();
}
#if defined(_WIN32)
ExitCode initService() {
return runMongosServer(getGlobalServiceContext());
}
#endif
/**
* This function should contain the startup "actions" that we take based on the startup config. It
* is intended to separate the actions from "storage" and "validation" of our startup configuration.
*/
void startupConfigActions(const std::vector<std::string>& argv) {
#if defined(_WIN32)
std::vector<std::string> disallowedOptions;
disallowedOptions.push_back("upgrade");
ntservice::configureService(
initService, moe::startupOptionsParsed, defaultServiceStrings, disallowedOptions, argv);
#endif
}
std::unique_ptr<AuthzManagerExternalState> createAuthzManagerExternalStateMongos() {
return stdx::make_unique<AuthzManagerExternalStateMongos>();
}
ExitCode main(ServiceContext* serviceContext) {
serviceContext->setFastClockSource(FastClockSourceFactory::create(Milliseconds{10}));
auto const shardingContext = Grid::get(serviceContext);
// We either have a setting where all processes are in localhost or none are
std::vector<HostAndPort> configServers = mongosGlobalParams.configdbs.getServers();
for (std::vector<HostAndPort>::const_iterator it = configServers.begin();
it != configServers.end();
++it) {
const HostAndPort& configAddr = *it;
if (it == configServers.begin()) {
shardingContext->setAllowLocalHost(configAddr.isLocalHost());
}
if (configAddr.isLocalHost() != shardingContext->allowLocalHost()) {
log(LogComponent::kDefault) << "cannot mix localhost and ip addresses in configdbs";
return EXIT_BADOPTIONS;
}
}
#if defined(_WIN32)
if (ntservice::shouldStartService()) {
ntservice::startService();
// If we reach here, then we are not running as a service. Service installation exits
// directly and so never reaches here either.
}
#endif
return runMongosServer(serviceContext);
}
namespace {
MONGO_INITIALIZER_GENERAL(ForkServer, ("EndStartupOptionHandling"), ("default"))
(InitializerContext* context) {
forkServerOrDie();
return Status::OK();
}
// Initialize the featureCompatibilityVersion server parameter since mongos does not have a
// featureCompatibilityVersion document from which to initialize the parameter. The parameter is set
// to the latest version because there is no feature gating that currently occurs at the mongos
// level. The shards are responsible for rejecting usages of new features if their
// featureCompatibilityVersion is lower.
MONGO_INITIALIZER_WITH_PREREQUISITES(SetFeatureCompatibilityVersion42, ("EndStartupOptionStorage"))
(InitializerContext* context) {
serverGlobalParams.featureCompatibility.setVersion(
ServerGlobalParams::FeatureCompatibility::Version::kFullyUpgradedTo42);
return Status::OK();
}
#ifdef MONGO_CONFIG_SSL
MONGO_INITIALIZER_GENERAL(setSSLManagerType, MONGO_NO_PREREQUISITES, ("SSLManager"))
(InitializerContext* context) {
isSSLServer = true;
return Status::OK();
}
#endif
} // namespace
ExitCode mongoSMain(int argc, char* argv[], char** envp) {
setMongos();
if (argc < 1)
return EXIT_BADOPTIONS;
setupSignalHandlers();
Status status = runGlobalInitializers(argc, argv, envp);
if (!status.isOK()) {
severe(LogComponent::kDefault) << "Failed global initialization: " << status;
return EXIT_ABRUPT;
}
try {
setGlobalServiceContext(ServiceContext::make());
} catch (...) {
auto cause = exceptionToStatus();
severe(LogComponent::kDefault) << "Failed to create service context: " << redact(cause);
return EXIT_ABRUPT;
}
const auto service = getGlobalServiceContext();
registerShutdownTask([service]() { cleanupTask(service); });
ErrorExtraInfo::invariantHaveAllParsers();
startupConfigActions(std::vector<std::string>(argv, argv + argc));
cmdline_utils::censorArgvArray(argc, argv);
logCommonStartupWarnings(serverGlobalParams);
try {
if (!initializeServerGlobalState(service))
return EXIT_ABRUPT;
if (!initializeServerSecurityGlobalState(service))
quickExit(EXIT_FAILURE);
startSignalProcessingThread();
return main(service);
} catch (const DBException& e) {
error() << "uncaught DBException in mongos main: " << redact(e);
return EXIT_UNCAUGHT;
} catch (const std::exception& e) {
error() << "uncaught std::exception in mongos main:" << redact(e.what());
return EXIT_UNCAUGHT;
} catch (...) {
error() << "uncaught unknown exception in mongos main";
return EXIT_UNCAUGHT;
}
}
} // namespace
} // namespace mongo
#if defined(_WIN32)
// In Windows, wmain() is an alternate entry point for main(), and receives the same parameters
// as main() but encoded in Windows Unicode (UTF-16); "wide" 16-bit wchar_t characters. The
// WindowsCommandLine object converts these wide character strings to a UTF-8 coded equivalent
// and makes them available through the argv() and envp() members. This enables mongoSMain()
// to process UTF-8 encoded arguments and environment variables without regard to platform.
int wmain(int argc, wchar_t* argvW[], wchar_t* envpW[]) {
mongo::WindowsCommandLine wcl(argc, argvW, envpW);
mongo::exitCleanly(mongo::mongoSMain(argc, wcl.argv(), wcl.envp()));
}
#else
int main(int argc, char* argv[], char** envp) {
mongo::exitCleanly(mongo::mongoSMain(argc, argv, envp));
}
#endif
|