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300 lines (281 loc) · 10.4 KB
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/*
* Copyright (c) 2025 OceanBase.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define USING_LOG_PREFIX RS
#include "ob_empty_server_checker.h"
#include "share/ls/ob_ls_table_iterator.h"//ObAllLSTableIterator
#include "share/ob_all_server_tracer.h"
#include "share/ls/ob_ls_table_operator.h"
#include "ob_server_manager.h"
#include "ob_unit_manager.h"//ObUnitManager
#include "ob_server_zone_op_service.h"
namespace oceanbase
{
namespace rootserver
{
using namespace common;
using namespace obrpc;
using namespace share;
void ObEmptyServerChecker::run3()
{
LOG_INFO("empty server checker start");
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else {
int64_t wait_time_ms = 0;
while (!stop_) {
ret = OB_SUCCESS;
ObThreadCondGuard guard(get_cond());
wait_time_ms = 10 * 1000;//10s
if (OB_FAIL(try_delete_server_())) {
LOG_WARN("failed to delete server", KR(ret));
}
if (OB_SUCC(ret) && !stop_ && !need_check_) {
wait_time_ms = 100;
}
if (OB_SUCCESS != idle_wait(wait_time_ms)) {
LOG_DEBUG("wait timeout", K(wait_time_ms));
}
}
}
LOG_INFO("empty server checker stop");
}
int ObEmptyServerChecker::try_delete_server_()
{
int ret = OB_SUCCESS;
ObZone zone; // empty means all zones
ObArray<ObServerInfoInTable> servers_info;
if (OB_UNLIKELY(!inited_)) {
ret = OB_NOT_INIT;
LOG_WARN("not init", KR(ret));
} else if (OB_ISNULL(server_mgr_) || OB_ISNULL(unit_mgr_) || OB_ISNULL(server_zone_op_service_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected error", KR(ret), KP(server_mgr_), KP(unit_mgr_), KP(server_zone_op_service_));
} else if (OB_FAIL(SVR_TRACER.get_servers_info(zone, servers_info))) {
LOG_WARN("get_servers_info failed", KR(ret), K(zone));
} else {
need_check_ = false;
empty_servers_.reset();
FOREACH_CNT_X(server_info, servers_info, OB_SUCC(ret)) {
if (server_info->is_deleting()) {
need_check_ = true;
bool server_empty = false;
const ObAddr &addr= server_info->get_server();
if (OB_FAIL(unit_mgr_->check_server_empty(addr, server_empty))) {
LOG_WARN("check_server_empty failed", "server", addr, KR(ret));
} else if (!server_empty) {
LOG_INFO("server not empty and has units on it", "server", addr, KR(ret));
} else if (OB_FAIL(empty_servers_.push_back(addr))) {
LOG_WARN("failed to push back empty server", KR(ret), KPC(server_info));
}
}
}
DEBUG_SYNC(END_DELETE_SERVER_BEFORE_CHECK_META_TABLE);
if (OB_SUCC(ret) && empty_servers_.count() > 0) {
//need check empty
if (OB_FAIL(check_server_empty_())) {
LOG_WARN("failed to check server empty", KR(ret));
}
}
if (OB_SUCC(ret) && empty_servers_.count() > 0) {
const bool commit = true;
for (int64_t i = 0; OB_SUCC(ret) && i < empty_servers_.count(); ++i) {
const ObAddr &addr = empty_servers_.at(i);
LOG_INFO("sys tenant data version >= 4.2, server zone op service executes finish_delete_server");
if (OB_FAIL(server_zone_op_service_->finish_delete_server(addr, zone))) {
LOG_WARN("server_zone_op_service finish_delete_server failed", KR(ret), K(addr), K(zone));
} else if (OB_FAIL(server_mgr_->load_server_manager())) {
LOG_WARN("fail to load server manager", KR(ret));
}
}
}
}
return ret;
}
void ObEmptyServerChecker::wakeup()
{
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else {
get_cond().broadcast();
}
}
void ObEmptyServerChecker::stop()
{
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else {
ObRsReentrantThread::stop();
ObThreadCondGuard guard(get_cond());
get_cond().broadcast();
}
}
int ObEmptyServerChecker::check_if_tenant_ls_replicas_exist_in_servers(
const uint64_t tenant_id,
const common::ObArray<common::ObAddr> &servers,
bool &exist)
{
int ret = OB_SUCCESS;
common::ObArray<ObLSInfo> tenant_ls_infos;
ObArray<ObAddr> empty_servers;
exist = false;
// if a tenant has ls replicas on a server, the server is not empty.
empty_servers.reset();
if (OB_ISNULL(GCTX.lst_operator_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("GCTX.lst_operator_ is null", KR(ret), KP(GCTX.lst_operator_));
} else if (OB_UNLIKELY(!is_valid_tenant_id(tenant_id))) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("invalid tenant", KR(ret), K(tenant_id));
} else if (OB_FAIL(GCTX.lst_operator_->load_all_ls_in_tenant(gen_meta_tenant_id(tenant_id), tenant_ls_infos))) {
LOG_WARN("fail to execute load_all_ls_in_tenant", KR(ret), K(tenant_id));
} else if (OB_FAIL(empty_servers.assign(servers))) {
// assumpt that all servers are empty
// (i.e. assumpt that the tenant does not have any ls replicas on these servers)
// not empty servers will be removed from empty_servers array in func check_server_emtpy_by_ls_
LOG_WARN("fail to assign servers to another array", KR(ret), K(servers));
} else {
for (int64_t i = 0; i < tenant_ls_infos.count() && OB_SUCC(ret) && empty_servers.count() == servers.count(); i++) {
// if empty_servers.count() < servers.count()
// it means that there is a not empty server
// the check can be returned
const ObLSInfo &ls_info = tenant_ls_infos.at(i);
if (OB_FAIL(check_server_emtpy_by_ls_(ls_info, empty_servers))) {
LOG_WARN("fail to check server empty", KR(ret), K(ls_info));
} else if (empty_servers.count() < servers.count()) {
exist = true;
LOG_INFO("the tenant has ls replicas on one of the given servers", KR(ret),
K(tenant_id), K(ls_info), K(empty_servers), K(servers));
}
}
}
return ret;
}
//check server not in meta table
int ObEmptyServerChecker::check_server_empty_()
{
int ret = OB_SUCCESS;
ObAllLSTableIterator iter;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else if (stop_) {
ret = OB_CANCELED;
LOG_WARN("cancle empty server check", KR(ret));
} else if (OB_ISNULL(schema_service_) || OB_ISNULL(lst_operator_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("schema service is null", KR(ret), KP(schema_service_), KP(lst_operator_));
} else if (OB_FAIL(iter.init(*lst_operator_, *schema_service_))) {
LOG_WARN("failed to init iter", KR(ret));
} else {
ObLSInfo ls_info;
ls_info.reset();
while (!stop_ && OB_SUCC(ret) && empty_servers_.size() > 0) {
if (OB_FAIL(iter.next(ls_info))) {
if (OB_ITER_END == ret) {
ret = OB_SUCCESS;
} else {
LOG_WARN("iterate ls table failed", K(ret));
}
break;
} else if (OB_FAIL(check_server_emtpy_by_ls_(ls_info, empty_servers_))) {
LOG_WARN("failed to check server empty", KR(ret), K(ls_info), K(empty_servers_));
}
}
}
if (OB_SUCC(ret) && stop_) {
ret = OB_CANCELED;
}
return ret;
}
ERRSIM_POINT_DEF(CHECK_SERVER_EMPTY_WHEN_LS_HAS_NO_LEADER);
int ObEmptyServerChecker::check_server_emtpy_by_ls_(
const share::ObLSInfo &ls_info,
common::ObArray<common::ObAddr> &empty_servers)
{
int ret = OB_SUCCESS;
if (OB_UNLIKELY(!ls_info.is_valid())) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("ls info is invalid", KR(ret), K(ls_info));
} else {
const ObIArray<ObLSReplica> &replica_array = ls_info.get_replicas();
const ObLSReplica *replica = NULL;
int64_t idx = -1;
// filter leader member_list
if (OB_FAIL(ls_info.find_leader(replica))) {
if (OB_ENTRY_NOT_EXIST == ret) {
ret = OB_LEADER_NOT_EXIST;
}
LOG_WARN("find leader failed", K(ret), K(ls_info));
} else if (OB_ISNULL(replica)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("NULL replica pointer", K(ret));
} else {
// check whether has member on empty servers
FOREACH_CNT_X(m, replica->get_member_list(), OB_SUCC(ret) && empty_servers.count() > 0) {
const ObAddr &addr = m->get_server();
if (has_exist_in_array(empty_servers, addr, &idx)) {
//has member in server
LOG_INFO("ls replica has member on server", K(ls_info), K(addr), K(empty_servers));
if (OB_FAIL(empty_servers.remove(idx))) {
LOG_WARN("failed to remove addr from empty servers", KR(ret), K(idx), K(empty_servers));
}
}
} // end FORECAH member_list
ObMember learner;
for (int64_t index = 0;
OB_SUCC(ret) && index < replica->get_learner_list().get_member_number() && empty_servers.count() > 0;
++index) {
learner.reset();
if (OB_FAIL(replica->get_learner_list().get_member_by_index(index, learner))) {
LOG_WARN("fail to get learner by index", KR(ret), K(index));
} else {
const ObAddr &addr = learner.get_server();
if (has_exist_in_array(empty_servers, addr, &idx)) {
//has learner in server
LOG_INFO("ls replica has learner on server", K(ls_info), K(addr), K(empty_servers));
if (OB_FAIL(empty_servers.remove(idx))) {
LOG_WARN("failed to remove addr from empty servers", KR(ret), K(idx), K(empty_servers));
}
}
}
}
}
// filter server of replicas
for (int64_t i = 0; i < replica_array.count() && OB_SUCC(ret); ++i) {
const ObAddr &addr = replica_array.at(i).get_server();
if (has_exist_in_array(empty_servers, addr, &idx)) {
//has member in server
LOG_INFO("this sever has ls replica", K(ls_info), K(addr));
if (OB_FAIL(empty_servers.remove(idx))) {
LOG_WARN("failed to remove addr from empty servers", KR(ret), K(idx));
}
}
}//end for
}
if (OB_SUCC(ret) && CHECK_SERVER_EMPTY_WHEN_LS_HAS_NO_LEADER) {
ret = OB_LEADER_NOT_EXIST;
LOG_WARN("errsim CHECK_SERVER_EMPTY_WHEN_LS_HAS_NO_LEADER opened", KR(ret));
}
return ret;
}
} // end namespace rootserver
} // end namespace oceanbase