Edit pq write actor logs (#15677)

Author: kardymonds

ydb/library/yql/providers/pq/async_io/dq_pq_write_actor.cpp

@@ -88,6 +88,10 @@ struct TEvPrivate {
     struct TEvPqEventsReady : public TEventLocal<TEvPqEventsReady, EvPqEventsReady> {};
 };
 
+TString MakeStringForLog(const NDqProto::TCheckpoint& checkpoint) {
+    return TStringBuilder() << "[Checkpoint " << checkpoint.GetGeneration() << "." << checkpoint.GetId() << "] ";
+}
+
 } // namespace
 
 class TDqPqWriteActor : public NActors::TActor<TDqPqWriteActor>, public IDqComputeActorAsyncOutput {
@@ -155,6 +159,7 @@ class TDqPqWriteActor : public NActors::TActor<TDqPqWriteActor>, public IDqCompu
         , LogPrefix(TStringBuilder() << "SelfId: " << this->SelfId() << ", TxId: " << TxId << ", TaskId: " << taskId << ", PQ sink. ")
         , FreeSpace(freeSpace)
         , PqGateway(pqGateway)
+        , TaskId(taskId)
     { 
         EgressStats.Level = statsLevel;
     }
@@ -215,11 +220,11 @@ class TDqPqWriteActor : public NActors::TActor<TDqPqWriteActor>, public IDqCompu
 
         if (checkpoint) {
             if (Buffer.empty() && WaitingAcks.empty()) {
-                SINK_LOG_D("Send checkpoint state immediately");
+                SINK_LOG_D(MakeStringForLog(*checkpoint) << "Send checkpoint state immediately");
                 Callbacks->OnAsyncOutputStateSaved(BuildState(*checkpoint), OutputIndex, *checkpoint);
             } else {
                 ui64 seqNo = NextSeqNo + Buffer.size() - 1;
-                SINK_LOG_D("Defer sending the checkpoint, seqNo: " << seqNo);
+                SINK_LOG_D(MakeStringForLog(*checkpoint) << "Defer sending the checkpoint, seqNo: " << seqNo);
                 Metrics.InFlyCheckpoints->Inc();
                 DeferredCheckpoints.emplace(seqNo, *checkpoint);
             }
@@ -275,10 +280,18 @@ class TDqPqWriteActor : public NActors::TActor<TDqPqWriteActor>, public IDqCompu
     )
 
     void Handle(TEvPrivate::TEvPqEventsReady::TPtr&) {
+        if (!Inited) {
+            Init();
+            Inited = true;
+        }
         while (HandleNewPQEvents()) { }
         SubscribeOnNextEvent();
     }
 
+    void Init() {
+        LogPrefix = TStringBuilder() << "SelfId: " << this->SelfId() << ", TxId: " << TxId << ", TaskId: " << TaskId << ", PQ sink. ";
+    }
+
     // IActor & IDqComputeActorAsyncOutput
     void PassAway() override { // Is called from Compute Actor
         if (WriteSession) {
@@ -433,7 +446,7 @@ class TDqPqWriteActor : public NActors::TActor<TDqPqWriteActor>, public IDqCompu
                 if (!Self.DeferredCheckpoints.empty() && std::get<0>(Self.DeferredCheckpoints.front()) == it->SeqNo) {
                     Self.ConfirmedSeqNo = it->SeqNo;
                     const auto& checkpoint = std::get<1>(Self.DeferredCheckpoints.front());
-                    LOG_D(Self.LogPrefix << "Send a deferred checkpoint, seqNo: " << it->SeqNo);
+                    LOG_D(Self.LogPrefix << MakeStringForLog(checkpoint) << "Send a deferred checkpoint, seqNo: " << it->SeqNo);
                     Self.Callbacks->OnAsyncOutputStateSaved(Self.BuildState(checkpoint), Self.OutputIndex, checkpoint);
                     Self.DeferredCheckpoints.pop();
                     Self.Metrics.InFlyCheckpoints->Dec();
@@ -479,7 +492,7 @@ class TDqPqWriteActor : public NActors::TActor<TDqPqWriteActor>, public IDqCompu
     NYdb::TDriver Driver;
     std::shared_ptr<NYdb::ICredentialsProviderFactory> CredentialsProviderFactory;
     IDqComputeActorAsyncOutput::ICallbacks* const Callbacks;
-    const TString LogPrefix;
+    TString LogPrefix;
     i64 FreeSpace = 0;
     bool Finished = false;
 
@@ -495,6 +508,8 @@ class TDqPqWriteActor : public NActors::TActor<TDqPqWriteActor>, public IDqCompu
     std::queue<TAckInfo> WaitingAcks; // Size of items which are waiting for acks (used to update free space)
     std::queue<std::tuple<ui64, NDqProto::TCheckpoint>> DeferredCheckpoints;
     IPqGateway::TPtr PqGateway;
+    ui64 TaskId;
+    bool Inited = false;
 };
 
 std::pair<IDqComputeActorAsyncOutput*, NActors::IActor*> CreateDqPqWriteActor(