bool ReplSetImpl::forceSyncFrom(const string& host, string& errmsg, BSONObjBuilder& result) {
lock lk(this);
// initial sanity check
if (iAmArbiterOnly()) {
errmsg = "arbiters don't sync";
return false;
}
if (box.getState().primary()) {
errmsg = "primaries don't sync";
return false;
}
if (_self != NULL && host == _self->fullName()) {
errmsg = "I cannot sync from myself";
return false;
}
// find the member we want to sync from
Member *newTarget = 0;
for (Member *m = _members.head(); m; m = m->next()) {
if (m->fullName() == host) {
newTarget = m;
break;
}
}
// do some more sanity checks
if (!newTarget) {
// this will also catch if someone tries to sync a member from itself, as _self is not
// included in the _members list.
errmsg = "could not find member in replica set";
return false;
}
if (newTarget->config().arbiterOnly) {
errmsg = "I cannot sync from an arbiter";
return false;
}
if (!newTarget->config().buildIndexes && myConfig().buildIndexes) {
errmsg = "I cannot sync from a member who does not build indexes";
return false;
}
if (newTarget->hbinfo().authIssue) {
errmsg = "I cannot authenticate against the requested member";
return false;
}
if (newTarget->hbinfo().health == 0) {
errmsg = "I cannot reach the requested member";
return false;
}
if (newTarget->hbinfo().opTime.getSecs()+10 < lastOpTimeWritten.getSecs()) {
log() << "attempting to sync from " << newTarget->fullName()
<< ", but its latest opTime is " << newTarget->hbinfo().opTime.getSecs()
<< " and ours is " << lastOpTimeWritten.getSecs() << " so this may not work"
<< rsLog;
result.append("warning", "requested member is more than 10 seconds behind us");
// not returning false, just warning
}
// record the previous member we were syncing from
const Member *prev = replset::BackgroundSync::get()->getSyncTarget();
if (prev) {
result.append("prevSyncTarget", prev->fullName());
}
// finally, set the new target
_forceSyncTarget = newTarget;
return true;
}
Status ReplSetImpl::forceSyncFrom(const string& host, BSONObjBuilder* result) {
lock lk(this);
// initial sanity check
if (iAmArbiterOnly()) {
return Status(ErrorCodes::NotSecondary, "arbiters don't sync");
}
if (box.getState().primary()) {
return Status(ErrorCodes::NotSecondary, "primaries don't sync");
}
if (_self != NULL && host == _self->fullName()) {
return Status(ErrorCodes::InvalidOptions, "I cannot sync from myself");
}
// find the member we want to sync from
Member *newTarget = 0;
for (Member *m = _members.head(); m; m = m->next()) {
if (m->fullName() == host) {
newTarget = m;
break;
}
}
// do some more sanity checks
if (!newTarget) {
// this will also catch if someone tries to sync a member from itself, as _self is not
// included in the _members list.
return Status(ErrorCodes::NodeNotFound, "could not find member in replica set");
}
if (newTarget->config().arbiterOnly) {
return Status(ErrorCodes::InvalidOptions, "I cannot sync from an arbiter");
}
if (!newTarget->config().buildIndexes && myConfig().buildIndexes) {
return Status(ErrorCodes::InvalidOptions,
"I cannot sync from a member who does not build indexes");
}
if (newTarget->hbinfo().authIssue) {
return Status(ErrorCodes::Unauthorized,
"not authorized to communicate with " + newTarget->fullName());
}
if (newTarget->hbinfo().health == 0) {
return Status(ErrorCodes::HostUnreachable, "I cannot reach the requested member");
}
if (newTarget->hbinfo().opTime.getSecs()+10 < lastOpTimeWritten.getSecs()) {
log() << "attempting to sync from " << newTarget->fullName()
<< ", but its latest opTime is " << newTarget->hbinfo().opTime.getSecs()
<< " and ours is " << lastOpTimeWritten.getSecs() << " so this may not work"
<< rsLog;
result->append("warning", "requested member is more than 10 seconds behind us");
// not returning false, just warning
}
// record the previous member we were syncing from
const HostAndPort prev = BackgroundSync::get()->getSyncTarget();
if (!prev.empty()) {
result->append("prevSyncTarget", prev.toString());
}
// finally, set the new target
_forceSyncTarget = newTarget;
return Status::OK();
}
