// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you 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.

#include "txn_manager.h"

#include <fmt/format.h>

#include <fmt/ranges.h>

#include <thrift/protocol/TDebugProtocol.h>

#include <time.h>

#include <filesystem>

#include <iterator>

#include <list>

#include <new>

#include <ostream>

#include <queue>

#include <set>

#include <string>

#include "common/config.h"

#include "common/logging.h"

#include "common/status.h"

#include "olap/data_dir.h"

#include "olap/delta_writer.h"

#include "olap/olap_common.h"

#include "olap/partial_update_info.h"

#include "olap/rowset/pending_rowset_helper.h"

#include "olap/rowset/rowset_meta.h"

#include "olap/rowset/rowset_meta_manager.h"

#include "olap/schema_change.h"

#include "olap/segment_loader.h"

#include "olap/storage_engine.h"

#include "olap/tablet_manager.h"

#include "olap/tablet_meta.h"

#include "olap/tablet_meta_manager.h"

#include "olap/task/engine_publish_version_task.h"

#include "util/debug_points.h"

#include "util/time.h"

namespace doris {

class OlapMeta;

} // namespace doris

using std::map;

using std::pair;

using std::set;

using std::string;

using std::stringstream;

using std::vector;

namespace doris {

using namespace ErrorCode;

TxnManager::TxnManager(StorageEngine& engine, int32_t txn_map_shard_size, int32_t txn_shard_size)

        : _engine(engine),

          _txn_map_shard_size(txn_map_shard_size),

          _txn_shard_size(txn_shard_size) {

    DCHECK_GT(_txn_map_shard_size, 0);

    DCHECK_GT(_txn_shard_size, 0);

    DCHECK_EQ(_txn_map_shard_size & (_txn_map_shard_size - 1), 0);

    DCHECK_EQ(_txn_shard_size & (_txn_shard_size - 1), 0);

    _txn_map_locks = new std::shared_mutex[_txn_map_shard_size];

    _txn_tablet_maps = new txn_tablet_map_t[_txn_map_shard_size];

    _txn_partition_maps = new txn_partition_map_t[_txn_map_shard_size];

    _txn_mutex = new std::shared_mutex[_txn_shard_size];

    _txn_tablet_delta_writer_map = new txn_tablet_delta_writer_map_t[_txn_map_shard_size];

    _txn_tablet_delta_writer_map_locks = new std::shared_mutex[_txn_map_shard_size];

    // For debugging

    _tablet_version_cache = std::make_unique<TabletVersionCache>(100000);

}

// prepare txn should always be allowed because ingest task will be retried

// could not distinguish rollup, schema change or base table, prepare txn successfully will allow

// ingest retried

Status TxnManager::prepare_txn(TPartitionId partition_id, const Tablet& tablet,

                               TTransactionId transaction_id, const PUniqueId& load_id,

                               bool ingest) {

    // check if the tablet has already been shutdown. If it has, it indicates that

    // it is an old tablet, and data should not be imported into the old tablet.

    // Otherwise, it may lead to data loss during migration.

    if (tablet.tablet_state() == TABLET_SHUTDOWN) {

        return Status::InternalError<false>(

                "The tablet's state is shutdown, tablet_id: {}. The tablet may have been dropped "

                "or migrationed. Please check if the table has been dropped or try again.",

                tablet.tablet_id());

    }

    return prepare_txn(partition_id, transaction_id, tablet.tablet_id(), tablet.tablet_uid(),

                       load_id, ingest);

}

// most used for ut

Status TxnManager::prepare_txn(TPartitionId partition_id, TTransactionId transaction_id,

                               TTabletId tablet_id, TabletUid tablet_uid, const PUniqueId& load_id,

                               bool ingest) {

    TxnKey key(partition_id, transaction_id);

    TabletInfo tablet_info(tablet_id, tablet_uid);

    std::lock_guard<std::shared_mutex> txn_wrlock(_get_txn_map_lock(transaction_id));

    txn_tablet_map_t& txn_tablet_map = _get_txn_tablet_map(transaction_id);

    DBUG_EXECUTE_IF("TxnManager.prepare_txn.random_failed", {

        if (rand() % 100 < (100 * dp->param("percent", 0.5))) {

            LOG_WARNING("TxnManager.prepare_txn.random_failed random failed")

                    .tag("txn_id", transaction_id)

                    .tag("tablet_id", tablet_id);

            return Status::InternalError("debug prepare txn random failed");

        }

    });

    DBUG_EXECUTE_IF("TxnManager.prepare_txn.wait", {

        if (auto wait = dp->param<int>("duration", 0); wait > 0) {

            LOG_WARNING("TxnManager.prepare_txn.wait")

                    .tag("txn_id", transaction_id)

                    .tag("tablet_id", tablet_id)

                    .tag("wait ms", wait);

            std::this_thread::sleep_for(std::chrono::milliseconds(wait));

        }

    });

    /// Step 1: check if the transaction is already exist

    do {

        auto iter = txn_tablet_map.find(key);

        if (iter == txn_tablet_map.end()) {

            break;

        }

        // exist TxnKey

        auto& txn_tablet_info_map = iter->second;

        auto load_itr = txn_tablet_info_map.find(tablet_info);

        if (load_itr == txn_tablet_info_map.end()) {

            break;

        }

        // found load for txn,tablet

        auto& load_info = load_itr->second;

        // case 1: user commit rowset, then the load id must be equal

        // check if load id is equal

        auto& load_id = load_info->load_id;

        if (load_info->load_id.hi() == load_id.hi() && load_info->load_id.lo() == load_id.lo() &&

            load_info->rowset != nullptr) {

            LOG(WARNING) << "find transaction exists when add to engine."

                         << "partition_id: " << key.first << ", transaction_id: " << key.second

                         << ", tablet: " << tablet_info.to_string();

            return Status::OK();

        }

    } while (false);

    /// Step 2: check if there are too many transactions on running.

    // check if there are too many transactions on running.

    // if yes, reject the request.

    txn_partition_map_t& txn_partition_map = _get_txn_partition_map(transaction_id);

    if (txn_partition_map.size() > config::max_runnings_transactions_per_txn_map) {

        return Status::Error<TOO_MANY_TRANSACTIONS>("too many transactions: {}, limit: {}",

                                                    txn_tablet_map.size(),

                                                    config::max_runnings_transactions_per_txn_map);

    }

    /// Step 3: Add transaction to engine

    // not found load id

    // case 1: user start a new txn, rowset = null

    // case 2: loading txn from meta env

    auto load_info = std::make_shared<TabletTxnInfo>(load_id, nullptr, ingest);

    load_info->prepare();

    txn_tablet_map[key][tablet_info] = std::move(load_info);

    _insert_txn_partition_map_unlocked(transaction_id, partition_id);

    VLOG_NOTICE << "add transaction to engine successfully."

                << "partition_id: " << key.first << ", transaction_id: " << key.second

                << ", tablet: " << tablet_info.to_string();

    return Status::OK();

}

Status TxnManager::commit_txn(TPartitionId partition_id, const Tablet& tablet,

                              TTransactionId transaction_id, const PUniqueId& load_id,

                              const RowsetSharedPtr& rowset_ptr, PendingRowsetGuard guard,

                              bool is_recovery,

                              std::shared_ptr<PartialUpdateInfo> partial_update_info) {

    return commit_txn(tablet.data_dir()->get_meta(), partition_id, transaction_id,

                      tablet.tablet_id(), tablet.tablet_uid(), load_id, rowset_ptr,

                      std::move(guard), is_recovery, partial_update_info);

}

Status TxnManager::publish_txn(TPartitionId partition_id, const TabletSharedPtr& tablet,

                               TTransactionId transaction_id, const Version& version,

                               TabletPublishStatistics* stats) {

    return publish_txn(tablet->data_dir()->get_meta(), partition_id, transaction_id,

                       tablet->tablet_id(), tablet->tablet_uid(), version, stats);

}

void TxnManager::abort_txn(TPartitionId partition_id, TTransactionId transaction_id,

                           TTabletId tablet_id, TabletUid tablet_uid) {

    pair<int64_t, int64_t> key(partition_id, transaction_id);

    TabletInfo tablet_info(tablet_id, tablet_uid);

    std::shared_lock txn_rdlock(_get_txn_map_lock(transaction_id));

    auto& txn_tablet_map = _get_txn_tablet_map(transaction_id);

    auto it = txn_tablet_map.find(key);

    if (it == txn_tablet_map.end()) {

        return;

    }

    auto& tablet_txn_info_map = it->second;

    auto tablet_txn_info_iter = tablet_txn_info_map.find(tablet_info);

    if (tablet_txn_info_iter == tablet_txn_info_map.end()) {

        return;

    }

    auto& txn_info = tablet_txn_info_iter->second;

    txn_info->abort();

}

// delete the txn from manager if it is not committed(not have a valid rowset)

Status TxnManager::rollback_txn(TPartitionId partition_id, const Tablet& tablet,

                                TTransactionId transaction_id) {

    return rollback_txn(partition_id, transaction_id, tablet.tablet_id(), tablet.tablet_uid());

}

Status TxnManager::delete_txn(TPartitionId partition_id, const TabletSharedPtr& tablet,

                              TTransactionId transaction_id) {

    return delete_txn(tablet->data_dir()->get_meta(), partition_id, transaction_id,

                      tablet->tablet_id(), tablet->tablet_uid());

}

void TxnManager::set_txn_related_delete_bitmap(

        TPartitionId partition_id, TTransactionId transaction_id, TTabletId tablet_id,

        TabletUid tablet_uid, bool unique_key_merge_on_write, DeleteBitmapPtr delete_bitmap,

        const RowsetIdUnorderedSet& rowset_ids,

        std::shared_ptr<PartialUpdateInfo> partial_update_info) {

    pair<int64_t, int64_t> key(partition_id, transaction_id);

    TabletInfo tablet_info(tablet_id, tablet_uid);

    std::lock_guard<std::shared_mutex> txn_lock(_get_txn_lock(transaction_id));

    {

        // get tx

        std::lock_guard<std::shared_mutex> wrlock(_get_txn_map_lock(transaction_id));

        txn_tablet_map_t& txn_tablet_map = _get_txn_tablet_map(transaction_id);

        auto it = txn_tablet_map.find(key);

        if (it == txn_tablet_map.end()) {

            LOG(WARNING) << "transaction_id: " << transaction_id

                         << " partition_id: " << partition_id << " may be cleared";

            return;

        }

        auto load_itr = it->second.find(tablet_info);

        if (load_itr == it->second.end()) {

            LOG(WARNING) << "transaction_id: " << transaction_id

                         << " partition_id: " << partition_id << " tablet_id: " << tablet_id

                         << " may be cleared";

            return;

        }

        auto& load_info = load_itr->second;

        load_info->unique_key_merge_on_write = unique_key_merge_on_write;

        load_info->delete_bitmap = delete_bitmap;

        load_info->rowset_ids = rowset_ids;

        load_info->partial_update_info = partial_update_info;

    }

}

Status TxnManager::commit_txn(OlapMeta* meta, TPartitionId partition_id,

                              TTransactionId transaction_id, TTabletId tablet_id,

                              TabletUid tablet_uid, const PUniqueId& load_id,

                              const RowsetSharedPtr& rowset_ptr, PendingRowsetGuard guard,

                              bool is_recovery,

                              std::shared_ptr<PartialUpdateInfo> partial_update_info) {

    if (partition_id < 1 || transaction_id < 1 || tablet_id < 1) {

        LOG(WARNING) << "invalid commit req "

                     << " partition_id=" << partition_id << " transaction_id=" << transaction_id

                     << " tablet_id=" << tablet_id;

        return Status::InternalError("invalid partition id");

    }

    pair<int64_t, int64_t> key(partition_id, transaction_id);

    TabletInfo tablet_info(tablet_id, tablet_uid);

    if (rowset_ptr == nullptr) {

        return Status::Error<ROWSET_INVALID>(

                "could not commit txn because rowset ptr is null. partition_id: {}, "

                "transaction_id: {}, tablet: {}",

                key.first, key.second, tablet_info.to_string());

    }

    DBUG_EXECUTE_IF("TxnManager.commit_txn.random_failed", {

        if (rand() % 100 < (100 * dp->param("percent", 0.5))) {

            LOG_WARNING("TxnManager.commit_txn.random_failed")

                    .tag("txn_id", transaction_id)

                    .tag("tablet_id", tablet_id);

            return Status::InternalError("debug commit txn random failed");

        }

    });

    DBUG_EXECUTE_IF("TxnManager.commit_txn.wait", {

        if (auto wait = dp->param<int>("duration", 0); wait > 0) {

            LOG_WARNING("TxnManager.commit_txn.wait")

                    .tag("txn_id", transaction_id)

                    .tag("tablet_id", tablet_id)

                    .tag("wait ms", wait);

            std::this_thread::sleep_for(std::chrono::milliseconds(wait));

        }

    });

    std::lock_guard<std::shared_mutex> txn_lock(_get_txn_lock(transaction_id));

    // this while loop just run only once, just for if break

    do {

        // get tx

        std::shared_lock rdlock(_get_txn_map_lock(transaction_id));

        auto rs_pb = rowset_ptr->rowset_meta()->get_rowset_pb();

        // TODO(dx): remove log after fix partition id eq 0 bug

        if (!rs_pb.has_partition_id() || rs_pb.partition_id() == 0) {

            rowset_ptr->rowset_meta()->set_partition_id(partition_id);

            LOG(WARNING) << "cant get partition id from rs pb, get from func arg partition_id="

                         << partition_id;

        }

        txn_tablet_map_t& txn_tablet_map = _get_txn_tablet_map(transaction_id);

        auto it = txn_tablet_map.find(key);

        if (it == txn_tablet_map.end()) {

            break;

        }

        auto load_itr = it->second.find(tablet_info);

        if (load_itr == it->second.end()) {

            break;

        }

        // found load for txn,tablet

        // case 1: user commit rowset, then the load id must be equal

        auto& load_info = load_itr->second;

        // check if load id is equal

        if (load_info->rowset == nullptr) {

            break;

        }

        if (load_info->load_id.hi() != load_id.hi() || load_info->load_id.lo() != load_id.lo()) {

            break;

        }

        // find a rowset with same rowset id, then it means a duplicate call

        if (load_info->rowset->rowset_id() == rowset_ptr->rowset_id()) {

            LOG(INFO) << "find rowset exists when commit transaction to engine."

                      << "partition_id: " << key.first << ", transaction_id: " << key.second

                      << ", tablet: " << tablet_info.to_string()

                      << ", rowset_id: " << load_info->rowset->rowset_id();

            // Should not remove this rowset from pending rowsets

            load_info->pending_rs_guard = std::move(guard);

            return Status::OK();

        }

        // find a rowset with different rowset id, then it should not happen, just return errors

        return Status::Error<PUSH_TRANSACTION_ALREADY_EXIST>(

                "find rowset exists when commit transaction to engine. but rowset ids are not "

                "same. partition_id: {}, transaction_id: {}, tablet: {}, exist rowset_id: {}, new "

                "rowset_id: {}",

                key.first, key.second, tablet_info.to_string(),

                load_info->rowset->rowset_id().to_string(), rowset_ptr->rowset_id().to_string());

    } while (false);

    // if not in recovery mode, then should persist the meta to meta env

    // save meta need access disk, it maybe very slow, so that it is not in global txn lock

    // it is under a single txn lock

    if (!is_recovery) {

        Status save_status =

                RowsetMetaManager::save(meta, tablet_uid, rowset_ptr->rowset_id(),

                                        rowset_ptr->rowset_meta()->get_rowset_pb(), false);

        DBUG_EXECUTE_IF("TxnManager.RowsetMetaManager.save_wait", {

            if (auto wait = dp->param<int>("duration", 0); wait > 0) {

                LOG_WARNING("TxnManager.RowsetMetaManager.save_wait")

                        .tag("txn_id", transaction_id)

                        .tag("tablet_id", tablet_id)

                        .tag("wait ms", wait);

                std::this_thread::sleep_for(std::chrono::milliseconds(wait));

            }

        });

        if (!save_status.ok()) {

            save_status.append(fmt::format(", txn id: {}", transaction_id));

            return save_status;

        }

        if (partial_update_info && partial_update_info->is_partial_update()) {

            PartialUpdateInfoPB partial_update_info_pb;

            partial_update_info->to_pb(&partial_update_info_pb);

            save_status = RowsetMetaManager::save_partial_update_info(

                    meta, tablet_id, partition_id, transaction_id, partial_update_info_pb);

            if (!save_status.ok()) {

                save_status.append(fmt::format(", txn_id: {}", transaction_id));

                return save_status;

            }

        }

    }

    TabletSharedPtr tablet;

    std::shared_ptr<PartialUpdateInfo> decoded_partial_update_info {nullptr};

    if (is_recovery) {

        tablet = _engine.tablet_manager()->get_tablet(tablet_id, tablet_uid);

        if (tablet != nullptr && tablet->enable_unique_key_merge_on_write()) {

            PartialUpdateInfoPB partial_update_info_pb;

            auto st = RowsetMetaManager::try_get_partial_update_info(

                    meta, tablet_id, partition_id, transaction_id, &partial_update_info_pb);

            if (st.ok()) {

                decoded_partial_update_info = std::make_shared<PartialUpdateInfo>();

                decoded_partial_update_info->from_pb(&partial_update_info_pb);

                DCHECK(decoded_partial_update_info->is_partial_update());

            } else if (!st.is<META_KEY_NOT_FOUND>()) {

                // the load is not a partial update

                return st;

            }

        }

    }

    {

        std::lock_guard<std::shared_mutex> wrlock(_get_txn_map_lock(transaction_id));

        auto load_info = std::make_shared<TabletTxnInfo>(load_id, rowset_ptr);

        load_info->pending_rs_guard = std::move(guard);

        if (is_recovery) {

            if (tablet != nullptr && tablet->enable_unique_key_merge_on_write()) {

                load_info->unique_key_merge_on_write = true;

                load_info->delete_bitmap.reset(new DeleteBitmap(tablet->tablet_id()));

                if (decoded_partial_update_info) {

                    LOG_INFO(

                            "get partial update info from RocksDB during recovery. txn_id={}, "

                            "partition_id={}, tablet_id={}, partial_update_info=[{}]",

                            transaction_id, partition_id, tablet_id,

                            decoded_partial_update_info->summary());

                    load_info->partial_update_info = decoded_partial_update_info;

                }

            }

        }

        load_info->commit();

        txn_tablet_map_t& txn_tablet_map = _get_txn_tablet_map(transaction_id);

        txn_tablet_map[key][tablet_info] = std::move(load_info);

        _insert_txn_partition_map_unlocked(transaction_id, partition_id);

        VLOG_NOTICE << "commit transaction to engine successfully."

                    << " partition_id: " << key.first << ", transaction_id: " << key.second

                    << ", tablet: " << tablet_info.to_string()

                    << ", rowsetid: " << rowset_ptr->rowset_id()

                    << ", version: " << rowset_ptr->version().first;

    }

    return Status::OK();

}

// remove a txn from txn manager

Status TxnManager::publish_txn(OlapMeta* meta, TPartitionId partition_id,

                               TTransactionId transaction_id, TTabletId tablet_id,

                               TabletUid tablet_uid, const Version& version,

                               TabletPublishStatistics* stats) {

    auto tablet = _engine.tablet_manager()->get_tablet(tablet_id);

    if (tablet == nullptr) {

        return Status::OK();

    }

    DCHECK(stats != nullptr);

    pair<int64_t, int64_t> key(partition_id, transaction_id);

    TabletInfo tablet_info(tablet_id, tablet_uid);

    RowsetSharedPtr rowset;

    std::shared_ptr<TabletTxnInfo> tablet_txn_info;

    int64_t t1 = MonotonicMicros();

    /// Step 1: get rowset, tablet_txn_info by key

    {

        std::shared_lock txn_rlock(_get_txn_lock(transaction_id));

        std::shared_lock txn_map_rlock(_get_txn_map_lock(transaction_id));

        stats->lock_wait_time_us += MonotonicMicros() - t1;

        txn_tablet_map_t& txn_tablet_map = _get_txn_tablet_map(transaction_id);

        if (auto it = txn_tablet_map.find(key); it != txn_tablet_map.end()) {

            auto& tablet_map = it->second;

            if (auto txn_info_iter = tablet_map.find(tablet_info);

                txn_info_iter != tablet_map.end()) {

                // found load for txn,tablet

                // case 1: user commit rowset, then the load id must be equal

                tablet_txn_info = txn_info_iter->second;

                rowset = tablet_txn_info->rowset;

            }

        }

    }

    if (rowset == nullptr) {

        return Status::Error<TRANSACTION_NOT_EXIST>(

                "publish txn failed, rowset not found. partition_id={}, transaction_id={}, "

                "tablet={}",

                partition_id, transaction_id, tablet_info.to_string());

    }

    DBUG_EXECUTE_IF("TxnManager.publish_txn.random_failed_before_save_rs_meta", {

        if (rand() % 100 < (100 * dp->param("percent", 0.5))) {

            LOG_WARNING("TxnManager.publish_txn.random_failed_before_save_rs_meta")

                    .tag("txn_id", transaction_id)

                    .tag("tablet_id", tablet_id);

            return Status::InternalError("debug publish txn before save rs meta random failed");

        }

    });

    DBUG_EXECUTE_IF("TxnManager.publish_txn.wait_before_save_rs_meta", {

        if (auto wait = dp->param<int>("duration", 0); wait > 0) {

            LOG_WARNING("TxnManager.publish_txn.wait_before_save_rs_meta")

                    .tag("txn_id", transaction_id)

                    .tag("tablet_id", tablet_id)

                    .tag("wait ms", wait);

            std::this_thread::sleep_for(std::chrono::milliseconds(wait));

        }

    });

    /// Step 2: make rowset visible

    // save meta need access disk, it maybe very slow, so that it is not in global txn lock

    // it is under a single txn lock

    // TODO(ygl): rowset is already set version here, memory is changed, if save failed

    // it maybe a fatal error

    rowset->make_visible(version);

    DBUG_EXECUTE_IF("TxnManager.publish_txn.random_failed_after_save_rs_meta", {

        if (rand() % 100 < (100 * dp->param("percent", 0.5))) {

            LOG_WARNING("TxnManager.publish_txn.random_failed_after_save_rs_meta")

                    .tag("txn_id", transaction_id)

                    .tag("tablet_id", tablet_id);

            return Status::InternalError("debug publish txn after save rs meta random failed");

        }

    });

    DBUG_EXECUTE_IF("TxnManager.publish_txn.wait_after_save_rs_meta", {

        if (auto wait = dp->param<int>("duration", 0); wait > 0) {

            LOG_WARNING("TxnManager.publish_txn.wait_after_save_rs_meta")

                    .tag("txn_id", transaction_id)

                    .tag("tablet_id", tablet_id)

                    .tag("wait ms", wait);

            std::this_thread::sleep_for(std::chrono::milliseconds(wait));

        }

    });

    // update delete_bitmap

    if (tablet_txn_info->unique_key_merge_on_write) {

        int64_t t2 = MonotonicMicros();

        RETURN_IF_ERROR(

                Tablet::update_delete_bitmap(tablet, tablet_txn_info.get(), transaction_id));

        int64_t t3 = MonotonicMicros();

        stats->calc_delete_bitmap_time_us = t3 - t2;

        RETURN_IF_ERROR(TabletMetaManager::save_delete_bitmap(

                tablet->data_dir(), tablet->tablet_id(), tablet_txn_info->delete_bitmap,

                version.second));

        stats->save_meta_time_us = MonotonicMicros() - t3;

    }

    /// Step 3:  add to binlog

    auto enable_binlog = tablet->is_enable_binlog();

    if (enable_binlog) {

        auto status = rowset->add_to_binlog();

        if (!status.ok()) {

            return Status::Error<ROWSET_ADD_TO_BINLOG_FAILED>(

                    "add rowset to binlog failed. when publish txn rowset_id: {}, tablet id: {}, "

                    "txn id: {}",

                    rowset->rowset_id().to_string(), tablet_id, transaction_id);

        }

    }

    /// Step 4: save meta

    int64_t t5 = MonotonicMicros();

    auto status = RowsetMetaManager::save(meta, tablet_uid, rowset->rowset_id(),

                                          rowset->rowset_meta()->get_rowset_pb(), enable_binlog);

    stats->save_meta_time_us += MonotonicMicros() - t5;

    if (!status.ok()) {

        status.append(fmt::format(", txn id: {}", transaction_id));

        return status;

    }

    if (tablet_txn_info->unique_key_merge_on_write && tablet_txn_info->partial_update_info &&

        tablet_txn_info->partial_update_info->is_partial_update()) {

        status = RowsetMetaManager::remove_partial_update_info(meta, tablet_id, partition_id,

                                                               transaction_id);

        if (!status) {

            // discard the error status and print the warning log

            LOG_WARNING(

                    "fail to remove partial update info from RocksDB. txn_id={}, rowset_id={}, "

                    "tablet_id={}, tablet_uid={}",

                    transaction_id, rowset->rowset_id().to_string(), tablet_id,

                    tablet_uid.to_string());

        }

    }

    // TODO(Drogon): remove these test codes

    if (enable_binlog) {

        auto version_str = fmt::format("{}", version.first);

        VLOG_DEBUG << fmt::format("tabletid: {}, version: {}, binlog filepath: {}", tablet_id,

                                  version_str, tablet->get_binlog_filepath(version_str));

    }

    /// Step 5: remove tablet_info from tnx_tablet_map

    // txn_tablet_map[key] empty, remove key from txn_tablet_map

    int64_t t6 = MonotonicMicros();

    std::lock_guard<std::shared_mutex> txn_lock(_get_txn_lock(transaction_id));

    std::lock_guard<std::shared_mutex> wrlock(_get_txn_map_lock(transaction_id));

    stats->lock_wait_time_us += MonotonicMicros() - t6;

    txn_tablet_map_t& txn_tablet_map = _get_txn_tablet_map(transaction_id);

    if (auto it = txn_tablet_map.find(key); it != txn_tablet_map.end()) {

        it->second.erase(tablet_info);

        VLOG_NOTICE << "publish txn successfully."

                    << " partition_id: " << key.first << ", txn_id: " << key.second

                    << ", tablet_id: " << tablet_info.tablet_id

                    << ", rowsetid: " << rowset->rowset_id() << ", version: " << version.first

                    << "," << version.second;

        if (it->second.empty()) {

            txn_tablet_map.erase(it);

            _clear_txn_partition_map_unlocked(transaction_id, partition_id);

        }

    }

    return status;

}

// txn could be rollbacked if it does not have related rowset

// if the txn has related rowset then could not rollback it, because it

// may be committed in another thread and our current thread meets errors when writing to data file

// BE has to wait for fe call clear txn api

Status TxnManager::rollback_txn(TPartitionId partition_id, TTransactionId transaction_id,

                                TTabletId tablet_id, TabletUid tablet_uid) {

    pair<int64_t, int64_t> key(partition_id, transaction_id);

    TabletInfo tablet_info(tablet_id, tablet_uid);

    std::lock_guard<std::shared_mutex> wrlock(_get_txn_map_lock(transaction_id));

    txn_tablet_map_t& txn_tablet_map = _get_txn_tablet_map(transaction_id);

    auto it = txn_tablet_map.find(key);

    if (it == txn_tablet_map.end()) {

        return Status::OK();

    }

    auto& tablet_txn_info_map = it->second;

    if (auto load_itr = tablet_txn_info_map.find(tablet_info);

        load_itr != tablet_txn_info_map.end()) {

        // found load for txn,tablet

        // case 1: user commit rowset, then the load id must be equal

        const auto& load_info = load_itr->second;

        if (load_info->rowset != nullptr) {

            return Status::Error<TRANSACTION_ALREADY_COMMITTED>(

                    "if rowset is not null, it means other thread may commit the rowset should "

                    "not delete txn any more");

        }

    }

    tablet_txn_info_map.erase(tablet_info);

    LOG(INFO) << "rollback transaction from engine successfully."

              << " partition_id: " << key.first << ", transaction_id: " << key.second

              << ", tablet: " << tablet_info.to_string();

    if (tablet_txn_info_map.empty()) {

        txn_tablet_map.erase(it);

        _clear_txn_partition_map_unlocked(transaction_id, partition_id);

    }

    return Status::OK();

}

// fe call this api to clear unused rowsets in be

// could not delete the rowset if it already has a valid version

Status TxnManager::delete_txn(OlapMeta* meta, TPartitionId partition_id,

                              TTransactionId transaction_id, TTabletId tablet_id,

                              TabletUid tablet_uid) {

    pair<int64_t, int64_t> key(partition_id, transaction_id);

    TabletInfo tablet_info(tablet_id, tablet_uid);

    std::lock_guard<std::shared_mutex> txn_wrlock(_get_txn_map_lock(transaction_id));

    txn_tablet_map_t& txn_tablet_map = _get_txn_tablet_map(transaction_id);

    auto it = txn_tablet_map.find(key);

    if (it == txn_tablet_map.end()) {

        return Status::Error<TRANSACTION_NOT_EXIST>("key not founded from txn_tablet_map");

    }

    auto load_itr = it->second.find(tablet_info);

    if (load_itr != it->second.end()) {

        // found load for txn,tablet

        // case 1: user commit rowset, then the load id must be equal

        auto& load_info = load_itr->second;

        auto& rowset = load_info->rowset;

        if (rowset != nullptr && meta != nullptr) {

            if (!rowset->is_pending()) {

                return Status::Error<TRANSACTION_ALREADY_COMMITTED>(

                        "could not delete transaction from engine, just remove it from memory not "

                        "delete from disk, because related rowset already published. partition_id: "

                        "{}, transaction_id: {}, tablet: {}, rowset id: {}, version: {}, state: {}",

                        key.first, key.second, tablet_info.to_string(),

                        rowset->rowset_id().to_string(), rowset->version().to_string(),

                        RowsetStatePB_Name(rowset->rowset_meta_state()));

            } else {

                static_cast<void>(RowsetMetaManager::remove(meta, tablet_uid, rowset->rowset_id()));

#ifndef BE_TEST

                _engine.add_unused_rowset(rowset);

#endif

                VLOG_NOTICE << "delete transaction from engine successfully."

                            << " partition_id: " << key.first << ", transaction_id: " << key.second

                            << ", tablet: " << tablet_info.to_string() << ", rowset: "

                            << (rowset != nullptr ? rowset->rowset_id().to_string() : "0");

            }

        }

        it->second.erase(load_itr);

    }

    if (it->second.empty()) {

        txn_tablet_map.erase(it);

        _clear_txn_partition_map_unlocked(transaction_id, partition_id);

    }

    return Status::OK();

}

void TxnManager::get_tablet_related_txns(TTabletId tablet_id, TabletUid tablet_uid,

                                         int64_t* partition_id,

                                         std::set<int64_t>* transaction_ids) {

    if (partition_id == nullptr || transaction_ids == nullptr) {

        LOG(WARNING) << "parameter is null when get transactions by tablet";

        return;

    }

    TabletInfo tablet_info(tablet_id, tablet_uid);

    for (int32_t i = 0; i < _txn_map_shard_size; i++) {

        std::shared_lock txn_rdlock(_txn_map_locks[i]);

        txn_tablet_map_t& txn_tablet_map = _txn_tablet_maps[i];

        for (auto& it : txn_tablet_map) {

            if (it.second.find(tablet_info) != it.second.end()) {

                *partition_id = it.first.first;

                transaction_ids->insert(it.first.second);

                VLOG_NOTICE << "find transaction on tablet."

                            << "partition_id: " << it.first.first

                            << ", transaction_id: " << it.first.second

                            << ", tablet: " << tablet_info.to_string();

            }

        }

    }

}

// force drop all txns related with the tablet

// maybe lock error, because not get txn lock before remove from meta

void TxnManager::force_rollback_tablet_related_txns(OlapMeta* meta, TTabletId tablet_id,

                                                    TabletUid tablet_uid) {

    TabletInfo tablet_info(tablet_id, tablet_uid);

    for (int32_t i = 0; i < _txn_map_shard_size; i++) {

        std::lock_guard<std::shared_mutex> txn_wrlock(_txn_map_locks[i]);

        txn_tablet_map_t& txn_tablet_map = _txn_tablet_maps[i];

        for (auto it = txn_tablet_map.begin(); it != txn_tablet_map.end();) {

            auto load_itr = it->second.find(tablet_info);

            if (load_itr != it->second.end()) {

                auto& load_info = load_itr->second;

                auto& rowset = load_info->rowset;

                if (rowset != nullptr && meta != nullptr) {

                    LOG(INFO) << " delete transaction from engine "

                              << ", tablet: " << tablet_info.to_string()

                              << ", rowset id: " << rowset->rowset_id();

                    static_cast<void>(

                            RowsetMetaManager::remove(meta, tablet_uid, rowset->rowset_id()));

                }

                LOG(INFO) << "remove tablet related txn."

                          << " partition_id: " << it->first.first

                          << ", transaction_id: " << it->first.second

                          << ", tablet: " << tablet_info.to_string() << ", rowset: "

                          << (rowset != nullptr ? rowset->rowset_id().to_string() : "0");

                it->second.erase(load_itr);

            }

            if (it->second.empty()) {

                _clear_txn_partition_map_unlocked(it->first.second, it->first.first);

                it = txn_tablet_map.erase(it);

            } else {

                ++it;

            }

        }

    }

    if (meta != nullptr) {

        Status st = RowsetMetaManager::remove_tablet_related_partial_update_info(meta, tablet_id);

        if (!st.ok()) {

            LOG_WARNING("failed to partial update info, tablet_id={}, err={}", tablet_id,

                        st.to_string());

        }

    }

}

void TxnManager::get_txn_related_tablets(const TTransactionId transaction_id,

                                         TPartitionId partition_id,

                                         std::map<TabletInfo, RowsetSharedPtr>* tablet_infos) {

    // get tablets in this transaction

    pair<int64_t, int64_t> key(partition_id, transaction_id);

    std::shared_lock txn_rdlock(_get_txn_map_lock(transaction_id));

    txn_tablet_map_t& txn_tablet_map = _get_txn_tablet_map(transaction_id);

    auto it = txn_tablet_map.find(key);

    if (it == txn_tablet_map.end()) {

        VLOG_NOTICE << "could not find tablet for"

                    << " partition_id=" << partition_id << ", transaction_id=" << transaction_id;

        return;

    }

    auto& load_info_map = it->second;

    // each tablet

    for (auto& load_info : load_info_map) {

        const TabletInfo& tablet_info = load_info.first;

        // must not check rowset == null here, because if rowset == null

        // publish version should failed

        tablet_infos->emplace(tablet_info, load_info.second->rowset);

    }

}

void TxnManager::get_all_related_tablets(std::set<TabletInfo>* tablet_infos) {

    for (int32_t i = 0; i < _txn_map_shard_size; i++) {

        std::shared_lock txn_rdlock(_txn_map_locks[i]);

        for (auto& it : _txn_tablet_maps[i]) {

            for (auto& tablet_load_it : it.second) {

                tablet_infos->emplace(tablet_load_it.first);

            }

        }

    }

}

void TxnManager::get_all_commit_tablet_txn_info_by_tablet(

        const Tablet& tablet, CommitTabletTxnInfoVec* commit_tablet_txn_info_vec) {

    for (int32_t i = 0; i < _txn_map_shard_size; i++) {

        std::shared_lock txn_rdlock(_txn_map_locks[i]);

        for (const auto& [txn_key, load_info_map] : _txn_tablet_maps[i]) {

            auto tablet_load_it = load_info_map.find(tablet.get_tablet_info());

            if (tablet_load_it != load_info_map.end()) {

                const auto& [_, load_info] = *tablet_load_it;

                const auto& rowset = load_info->rowset;

                const auto& delete_bitmap = load_info->delete_bitmap;

                if (!rowset || !delete_bitmap) {

                    continue;

                }

                commit_tablet_txn_info_vec->push_back({

                        .transaction_id = txn_key.second,

                        .partition_id = txn_key.first,

                        .delete_bitmap = delete_bitmap,

                        .rowset_ids = load_info->rowset_ids,

                        .partial_update_info = load_info->partial_update_info,

                });

            }

        }

    }

}

void TxnManager::build_expire_txn_map(std::map<TabletInfo, std::vector<int64_t>>* expire_txn_map) {

    int64_t now = UnixSeconds();

    // traverse the txn map, and get all expired txns

    for (int32_t i = 0; i < _txn_map_shard_size; i++) {

        std::shared_lock txn_rdlock(_txn_map_locks[i]);

        for (auto&& [txn_key, tablet_txn_infos] : _txn_tablet_maps[i]) {

            auto txn_id = txn_key.second;

            for (auto&& [tablet_info, txn_info] : tablet_txn_infos) {

                double diff = difftime(now, txn_info->creation_time);

                if (diff < config::pending_data_expire_time_sec) {

                    continue;

                }

                (*expire_txn_map)[tablet_info].push_back(txn_id);

                if (VLOG_IS_ON(3)) {

                    VLOG_NOTICE << "find expired txn."

                                << " tablet=" << tablet_info.to_string()

                                << " transaction_id=" << txn_id << " exist_sec=" << diff;

                }

            }

        }

    }

}

void TxnManager::get_partition_ids(const TTransactionId transaction_id,

                                   std::vector<TPartitionId>* partition_ids) {

    std::shared_lock txn_rdlock(_get_txn_map_lock(transaction_id));

    txn_partition_map_t& txn_partition_map = _get_txn_partition_map(transaction_id);

    auto it = txn_partition_map.find(transaction_id);

    if (it != txn_partition_map.end()) {

        for (int64_t partition_id : it->second) {

            partition_ids->push_back(partition_id);

        }

    }

}

void TxnManager::_insert_txn_partition_map_unlocked(int64_t transaction_id, int64_t partition_id) {

    txn_partition_map_t& txn_partition_map = _get_txn_partition_map(transaction_id);

    auto find = txn_partition_map.find(transaction_id);

    if (find == txn_partition_map.end()) {

        txn_partition_map[transaction_id] = std::unordered_set<int64_t>();

    }

    txn_partition_map[transaction_id].insert(partition_id);

}

void TxnManager::_clear_txn_partition_map_unlocked(int64_t transaction_id, int64_t partition_id) {

    txn_partition_map_t& txn_partition_map = _get_txn_partition_map(transaction_id);

    auto it = txn_partition_map.find(transaction_id);

    if (it != txn_partition_map.end()) {

        it->second.erase(partition_id);

        if (it->second.empty()) {

            txn_partition_map.erase(it);

        }

    }

}

void TxnManager::add_txn_tablet_delta_writer(int64_t transaction_id, int64_t tablet_id,

                                             DeltaWriter* delta_writer) {

    std::lock_guard<std::shared_mutex> txn_wrlock(

            _get_txn_tablet_delta_writer_map_lock(transaction_id));

    txn_tablet_delta_writer_map_t& txn_tablet_delta_writer_map =

            _get_txn_tablet_delta_writer_map(transaction_id);

    auto find = txn_tablet_delta_writer_map.find(transaction_id);

    if (find == txn_tablet_delta_writer_map.end()) {

        txn_tablet_delta_writer_map[transaction_id] = std::map<int64_t, DeltaWriter*>();

    }

    txn_tablet_delta_writer_map[transaction_id][tablet_id] = delta_writer;

}

void TxnManager::finish_slave_tablet_pull_rowset(int64_t transaction_id, int64_t tablet_id,

                                                 int64_t node_id, bool is_succeed) {

    std::lock_guard<std::shared_mutex> txn_wrlock(

            _get_txn_tablet_delta_writer_map_lock(transaction_id));

    txn_tablet_delta_writer_map_t& txn_tablet_delta_writer_map =

            _get_txn_tablet_delta_writer_map(transaction_id);

    auto find_txn = txn_tablet_delta_writer_map.find(transaction_id);

    if (find_txn == txn_tablet_delta_writer_map.end()) {

        LOG(WARNING) << "delta writer manager is not exist, txn_id=" << transaction_id

                     << ", tablet_id=" << tablet_id;

        return;

    }

    auto find_tablet = txn_tablet_delta_writer_map[transaction_id].find(tablet_id);

    if (find_tablet == txn_tablet_delta_writer_map[transaction_id].end()) {

        LOG(WARNING) << "delta writer is not exist, txn_id=" << transaction_id

                     << ", tablet_id=" << tablet_id;

        return;

    }

    DeltaWriter* delta_writer = txn_tablet_delta_writer_map[transaction_id][tablet_id];

    delta_writer->finish_slave_tablet_pull_rowset(node_id, is_succeed);

}

void TxnManager::clear_txn_tablet_delta_writer(int64_t transaction_id) {

    std::lock_guard<std::shared_mutex> txn_wrlock(

            _get_txn_tablet_delta_writer_map_lock(transaction_id));

    txn_tablet_delta_writer_map_t& txn_tablet_delta_writer_map =

            _get_txn_tablet_delta_writer_map(transaction_id);

    auto it = txn_tablet_delta_writer_map.find(transaction_id);

    if (it != txn_tablet_delta_writer_map.end()) {

        txn_tablet_delta_writer_map.erase(it);

    }

    VLOG_CRITICAL << "remove delta writer manager, txn_id=" << transaction_id;

}

int64_t TxnManager::get_txn_by_tablet_version(int64_t tablet_id, int64_t version) {

    char key[16];

    memcpy(key, &tablet_id, sizeof(int64_t));

    memcpy(key + sizeof(int64_t), &version, sizeof(int64_t));

    CacheKey cache_key((const char*)&key, sizeof(key));

    auto* handle = _tablet_version_cache->lookup(cache_key);

    if (handle == nullptr) {

        return -1;

    }

    int64_t res = ((CacheValue*)_tablet_version_cache->value(handle))->value;

    _tablet_version_cache->release(handle);

    return res;

}

void TxnManager::update_tablet_version_txn(int64_t tablet_id, int64_t version, int64_t txn_id) {

    char key[16];

    memcpy(key, &tablet_id, sizeof(int64_t));

    memcpy(key + sizeof(int64_t), &version, sizeof(int64_t));

    CacheKey cache_key((const char*)&key, sizeof(key));

    auto* value = new CacheValue;

    value->value = txn_id;

    auto* handle = _tablet_version_cache->insert(cache_key, value, 1, sizeof(txn_id),

                                                 CachePriority::NORMAL);

    _tablet_version_cache->release(handle);

}

TxnState TxnManager::get_txn_state(TPartitionId partition_id, TTransactionId transaction_id,

                                   TTabletId tablet_id, TabletUid tablet_uid) {

    pair<int64_t, int64_t> key(partition_id, transaction_id);

    TabletInfo tablet_info(tablet_id, tablet_uid);

    std::shared_lock txn_rdlock(_get_txn_map_lock(transaction_id));

    auto& txn_tablet_map = _get_txn_tablet_map(transaction_id);

    auto it = txn_tablet_map.find(key);

    if (it == txn_tablet_map.end()) {

        return TxnState::NOT_FOUND;