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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/s/query/cluster_cursor_cleanup_job.h"
#include "mongo/db/client.h"
#include "mongo/db/server_parameters.h"
#include "mongo/s/grid.h"
#include "mongo/s/query/cluster_cursor_manager.h"
#include "mongo/util/concurrency/idle_thread_block.h"
#include "mongo/util/exit.h"
#include "mongo/util/time_support.h"
namespace mongo {
namespace {
// Period of time after which mortal cursors are killed for inactivity. Configurable with server
// parameter "cursorTimeoutMillis".
AtomicInt64 cursorTimeoutMillis(durationCount<Milliseconds>(Minutes(10)));
ExportedServerParameter<long long, ServerParameterType::kStartupAndRuntime>
cursorTimeoutMillisConfig(ServerParameterSet::getGlobal(),
"cursorTimeoutMillis",
&cursorTimeoutMillis);
// Frequency with which ClusterCursorCleanupJob is run.
MONGO_EXPORT_SERVER_PARAMETER(clientCursorMonitorFrequencySecs, long long, 4);
} // namespace
ClusterCursorCleanupJob clusterCursorCleanupJob;
std::string ClusterCursorCleanupJob::name() const {
return "ClusterCursorCleanupJob";
}
void ClusterCursorCleanupJob::run() {
Client::initThread(name().c_str());
auto* const client = Client::getCurrent();
auto* const manager = Grid::get(client->getServiceContext())->getCursorManager();
invariant(manager);
while (!globalInShutdownDeprecated()) {
// Mirroring the behavior in CursorManager::timeoutCursors(), a negative value for
// cursorTimeoutMillis has the same effect as a 0 value: cursors are cleaned immediately.
auto cursorTimeoutValue = cursorTimeoutMillis.load();
const auto opCtx = client->makeOperationContext();
Date_t cutoff = (cursorTimeoutValue > 0)
? (Date_t::now() - Milliseconds(cursorTimeoutValue))
: Date_t::now();
manager->killMortalCursorsInactiveSince(cutoff);
manager->incrementCursorsTimedOut(manager->reapZombieCursors(opCtx.get()));
MONGO_IDLE_THREAD_BLOCK;
sleepsecs(clientCursorMonitorFrequencySecs.load());
}
}
} // namespace mongo
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