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/**
* Copyright (C) 2012 10gen 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/db/index_rebuilder.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/user_name.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/client.h"
#include "mongo/db/instance.h"
#include "mongo/db/pdfile.h"
#include "mongo/db/repl/rs.h"
#include "mongo/db/operation_context_impl.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
IndexRebuilder indexRebuilder;
IndexRebuilder::IndexRebuilder() {}
std::string IndexRebuilder::name() const {
return "IndexRebuilder";
}
void IndexRebuilder::run() {
Client::initThread(name().c_str());
ON_BLOCK_EXIT_OBJ(cc(), &Client::shutdown);
cc().getAuthorizationSession()->grantInternalAuthorization();
std::vector<std::string> dbNames;
getDatabaseNames(dbNames);
try {
std::list<std::string> collNames;
for (std::vector<std::string>::const_iterator dbName = dbNames.begin();
dbName < dbNames.end();
dbName++) {
Client::ReadContext ctx(*dbName);
Database* db = ctx.ctx().db();
db->namespaceIndex().getNamespaces(collNames, /* onlyCollections */ true);
}
checkNS(collNames);
}
catch (const DBException& e) {
warning() << "Index rebuilding did not complete: " << e.what() << endl;
}
boost::unique_lock<boost::mutex> lk(ReplSet::rss.mtx);
ReplSet::rss.indexRebuildDone = true;
ReplSet::rss.cond.notify_all();
LOG(1) << "checking complete" << endl;
}
void IndexRebuilder::checkNS(const std::list<std::string>& nsToCheck) {
bool firstTime = true;
for (std::list<std::string>::const_iterator it = nsToCheck.begin();
it != nsToCheck.end();
++it) {
string ns = *it;
LOG(3) << "IndexRebuilder::checkNS: " << ns;
// This write lock is held throughout the index building process
// for this namespace.
Client::WriteContext ctx(ns);
OperationContextImpl txn; // XXX???
Collection* collection = ctx.ctx().db()->getCollection( ns );
if ( collection == NULL )
continue;
IndexCatalog* indexCatalog = collection->getIndexCatalog();
if ( collection->ns().isOplog() && indexCatalog->numIndexesTotal() > 0 ) {
warning() << ns << " had illegal indexes, removing";
indexCatalog->dropAllIndexes(&txn, true);
continue;
}
vector<BSONObj> indexesToBuild = indexCatalog->getAndClearUnfinishedIndexes(&txn);
// The indexes have now been removed from system.indexes, so the only record is
// in-memory. If there is a journal commit between now and when insert() rewrites
// the entry and the db crashes before the new system.indexes entry is journalled,
// the index will be lost forever. Thus, we're assuming no journaling will happen
// between now and the entry being re-written.
if ( indexesToBuild.size() == 0 ) {
continue;
}
log() << "found " << indexesToBuild.size()
<< " interrupted index build(s) on " << ns;
if (firstTime) {
log() << "note: restart the server with --noIndexBuildRetry to skip index rebuilds";
firstTime = false;
}
if (!serverGlobalParams.indexBuildRetry) {
log() << " not rebuilding interrupted indexes";
continue;
}
// TODO: these can/should/must be done in parallel
for ( size_t i = 0; i < indexesToBuild.size(); i++ ) {
BSONObj indexObj = indexesToBuild[i];
log() << "going to rebuild: " << indexObj;
Status status = indexCatalog->createIndex(&txn, indexObj, false);
if ( !status.isOK() ) {
log() << "building index failed: " << status.toString() << " index: " << indexObj;
}
}
}
}
}
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