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) {
// This write lock is held throughout the index building process
// for this namespace.
Client::WriteContext ctx(*it);
Collection* collection = ctx.ctx().db()->getCollection( *it );
if ( collection == NULL )
continue;
IndexCatalog* indexCatalog = collection->getIndexCatalog();
if ( indexCatalog->numIndexesInProgress() == 0 ) {
continue;
}
log() << "found interrupted index build(s) on " << *it << endl;
if (firstTime) {
log() << "note: restart the server with --noIndexBuildRetry to skip index rebuilds";
firstTime = false;
}
// If the indexBuildRetry flag isn't set, just clear the inProg flag
if (!serverGlobalParams.indexBuildRetry) {
// If we crash between unsetting the inProg flag and cleaning up the index, the
// index space will be lost.
Status s = indexCatalog->blowAwayInProgressIndexEntries();
if ( !s.isOK() ) {
log() << "failed to blowAwayInProgressIndexEntries: " << s;
fassertFailed( 17201 );
}
continue;
}
// We go from right to left building these indexes, so that indexBuildInProgress-- has
// the correct effect of "popping" an index off the list.
while ( indexCatalog->numIndexesInProgress() > 0 ) {
// First, clean up the in progress index build. Save the system.indexes entry so that we
// can add it again afterwards.
BSONObj indexObj = indexCatalog->prepOneUnfinishedIndex();
// The index has now been removed from system.indexes, so the only record of it 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.
try {
// TODO
const std::string ns = collection->ns().getSystemIndexesCollection();
theDataFileMgr.insert(ns.c_str(), indexObj.objdata(), indexObj.objsize(), false, true);
}
catch (const DBException& e) {
log() << "building index failed: " << e.what() << " (" << e.getCode() << ")";
}
}
}
}
