fix logic of Maximum continuous replayed log_id

src/storage/ob_i_partition_group.h

@@ -467,7 +467,6 @@ public:
   virtual int retire_warmup_store(const bool is_disk_full) = 0;
   virtual int enable_write_log(const bool is_replay_old) = 0;
   virtual uint64_t get_min_replayed_log_id() = 0;  // Get the minimum log id that has been replayed continuously.
-  virtual void get_min_replayed_log(uint64_t& min_replay_log_id, int64_t& min_replay_log_ts) = 0;
   virtual int get_min_replayed_log_with_keepalive(uint64_t& min_replay_log_id, int64_t& min_replay_log_ts) = 0;
   virtual int create_partition_group(const ObCreatePGParam& param) = 0;
   virtual int create_pg_partition(const common::ObPartitionKey& pkey, const int64_t multi_version_start,

src/storage/ob_partition_group.cpp

@@ -5364,35 +5364,12 @@ uint64_t ObPartitionGroup::get_min_replayed_log_id()
   uint64_t min_replay_log_id = UINT64_MAX;
   int64_t unused = 0;
 
-  get_min_replayed_log(min_replay_log_id, unused);
+  get_min_replayed_log_with_keepalive(min_replay_log_id, unused);
 
   return min_replay_log_id;
 }
 
-void ObPartitionGroup::get_min_replayed_log(uint64_t& min_replay_log_id, int64_t& min_replay_log_ts)
-{
-  uint64_t unreplay_log_id = UINT64_MAX;
-  int64_t unreplay_log_ts = 0;
-  uint64_t last_replay_log_id = UINT64_MAX;
-  int64_t last_replay_log_ts = 0;
-
-  // 1. The left boundary of sliding window.
-  pls_->get_last_replay_log(last_replay_log_id, last_replay_log_ts);
-
-  // 2. The minimum continuously replayed log of replay engine.
-  replay_status_->get_min_unreplay_log(unreplay_log_id, unreplay_log_ts);
-  if (unreplay_log_id <= last_replay_log_id) {
-    min_replay_log_id = unreplay_log_id - 1;
-    min_replay_log_ts = unreplay_log_ts - 1;
-  } else {
-    min_replay_log_id = last_replay_log_id;
-    min_replay_log_ts = last_replay_log_ts;
-  }
-
-  STORAGE_LOG(INFO, "min replayed log", K(pkey_), K(min_replay_log_ts), K(unreplay_log_ts), K(last_replay_log_ts));
-}
-
-int ObPartitionGroup::get_min_replayed_log_with_keepalive(uint64_t& min_replay_log_id, int64_t& min_replay_log_ts)
+int ObPartitionGroup::get_min_replayed_log_with_keepalive(uint64_t &min_replay_log_id, int64_t &min_replay_log_ts)
 {
   int ret = OB_SUCCESS;
   uint64_t unreplay_log_id = UINT64_MAX;
@@ -5406,12 +5383,13 @@ int ObPartitionGroup::get_min_replayed_log_with_keepalive(uint64_t& min_replay_l
   } else {
     // 2. The minimum continuously replayed log of replay engine.
     replay_status_->get_min_unreplay_log(unreplay_log_id, unreplay_log_ts);
-    if (unreplay_log_id <= next_replay_log_id - 1) {
-      min_replay_log_id = unreplay_log_id - 1;
-      min_replay_log_ts = unreplay_log_ts - 1;
-    } else {
+    if (unreplay_log_id == next_replay_log_id) {
+      // cold partition, return next_replay_log_ts instead of unreplay_log_ts,  unreplay_log_ts may be too small.
       min_replay_log_id = next_replay_log_id - 1;
       min_replay_log_ts = next_replay_log_ts - 1;
+    } else {
+      min_replay_log_id = unreplay_log_id - 1;
+      min_replay_log_ts = unreplay_log_ts - 1;
     }
 
     STORAGE_LOG(INFO,
@@ -5856,7 +5834,7 @@ int ObPartitionGroup::get_merge_log_ts(int64_t& merge_ts)
 
   ObPartitionGroupLockGuard guard(lock_, PGLOCKTRANS | PGLOCKREPLAY | PGLOCKCLOG, 0);
   uint64_t unused = 0;
-  get_min_replayed_log(unused, merge_ts);
+  get_min_replayed_log_with_keepalive(unused, merge_ts);
 
   if (OB_ISNULL(txs_)) {
     ret = OB_ERR_UNEXPECTED;

src/storage/ob_partition_group.h

@@ -343,7 +343,6 @@ public:
   int has_active_memtable(bool& found);
   virtual int enable_write_log(const bool is_replay_old) override;
   virtual uint64_t get_min_replayed_log_id() override;
-  virtual void get_min_replayed_log(uint64_t& min_replay_log_id, int64_t& min_replay_log_ts) override;
   virtual int get_min_replayed_log_with_keepalive(uint64_t& min_replay_log_id, int64_t& min_replay_log_ts) override;
   virtual int check_dirty_txn(
       const int64_t min_log_ts, const int64_t max_log_ts, int64_t& freeze_ts, bool& is_dirty) override;

src/storage/ob_partition_loop_worker.cpp

@@ -137,7 +137,15 @@ int ObPartitionLoopWorker::gen_readable_info_with_memtable_(ObPartitionReadableI
       STORAGE_LOG(WARN, "get_next_replay_log_info error", K(ret), K_(pkey));
     }
   } else {
-    readable_info.min_replay_engine_ts_ = replay_status_->get_min_unreplay_log_timestamp();
+    uint64_t min_unreplay_log_id = OB_INVALID_ID;
+    int64_t min_unreplay_log_ts = OB_INVALID_TIMESTAMP;
+    replay_status_->get_min_unreplay_log(min_unreplay_log_id, min_unreplay_log_ts);
+    if (min_unreplay_log_id == next_replay_log_id) {
+      // cold partition, min_unreplay_log_ts returned by replay engine may be too small
+      readable_info.min_replay_engine_ts_ = readable_info.min_log_service_ts_;
+    } else {
+      readable_info.min_replay_engine_ts_ = min_unreplay_log_ts;
+    }
     if (OB_FAIL(txs_->get_min_uncommit_prepare_version(pkey_, readable_info.min_trans_service_ts_))) {
       if (OB_PARTITION_NOT_EXIST == ret) {
         if (REACH_TIME_INTERVAL(60 * 1000 * 1000)) {

src/storage/ob_replay_status.cpp

@@ -526,6 +526,8 @@ uint64_t ObReplayStatus::get_min_unreplay_log_id()
 // the invoker needs to lock
 int64_t ObReplayStatus::get_min_unreplay_log_timestamp()
 {
+  // for cold partition: timestamp returned may be small then expected, need to be double check with
+  // value returned by log service
   uint64_t unused = UINT64_MAX;
   int64_t timestamp = INT64_MAX;
   get_min_unreplay_log(unused, timestamp);
@@ -534,19 +536,12 @@ int64_t ObReplayStatus::get_min_unreplay_log_timestamp()
 
 void ObReplayStatus::get_min_unreplay_log(uint64_t& unreplay_log_id, int64_t& timestamp)
 {
-  unreplay_log_id = UINT64_MAX;
-  timestamp = INT64_MAX;
+  // for cold partition: timestamp returned may be small then expected, need to be double check with
+  // value returned by log service
   {
     RLockGuard Rlock_guard(get_submit_log_info_rwlock());
-    uint64_t next_submit_log_id = get_next_submit_log_id();
-    int64_t next_submit_log_ts = get_next_submit_log_ts();
-    uint64_t last_slide_out_log_id = get_last_slide_out_log_id();
-    int64_t last_slide_out_log_ts = get_last_slide_out_log_ts();
-
-    if (next_submit_log_ts <= last_slide_out_log_ts) {
-      unreplay_log_id = next_submit_log_id;
-      timestamp = next_submit_log_ts;
-    }
+    unreplay_log_id = get_next_submit_log_id();
+    timestamp = get_next_submit_log_ts();
   }
 
   for (int64_t i = 0; i < REPLAY_TASK_QUEUE_SIZE; ++i) {

unittest/storage/mockcontainer/mock_ob_partition.h

@@ -302,7 +302,6 @@ public:
     return common::OB_SUCCESS;
   }
   MOCK_METHOD0(get_min_replayed_log_id, uint64_t());
-  MOCK_METHOD2(get_min_replayed_log, void(uint64_t& min_replay_log_id, int64_t& min_replay_log_ts));
   MOCK_METHOD2(get_min_replayed_log_with_keepalive, int(uint64_t& min_replay_log_id, int64_t& min_replay_log_ts));
   MOCK_CONST_METHOD1(get_table_store_cnt, int(int64_t& table_cnt));
   MOCK_METHOD4(