additional logging (#19664) (#19803)

Author: swalrus1

ydb/core/tx/columnshard/engines/reader/actor/actor.cpp

@@ -114,6 +114,7 @@ void TColumnShardScan::HandleScan(NKqp::TEvKqpCompute::TEvScanDataAck::TPtr& ev)
 
 void TColumnShardScan::HandleScan(NKqp::TEvKqpCompute::TEvScanPing::TPtr&) {
     if (!AckReceivedInstant) {
+        AFL_WARN(NKikimrServices::TX_COLUMNSHARD_SCAN)("event", "ping_from_kqp");
         LastResultInstant = TMonotonic::Now();
     }
 }
@@ -173,15 +174,14 @@ void TColumnShardScan::CheckHanging(const bool logging) const {
 }
 
 void TColumnShardScan::HandleScan(TEvents::TEvWakeup::TPtr& /*ev*/) {
-    LOG_ERROR_S(*TlsActivationContext, NKikimrServices::TX_COLUMNSHARD_SCAN,
-        "Scan " << ScanActorId << " guard execution timeout"
-                << " txId: " << TxId << " scanId: " << ScanId << " gen: " << ScanGen << " tablet: " << TabletId);
-
+    AFL_ERROR(NKikimrServices::TX_COLUMNSHARD_SCAN)("event", "guard execution timeout")("scan_actor_id", ScanActorId);
     CheckHanging(true);
     if (!AckReceivedInstant && TMonotonic::Now() >= GetComputeDeadline()) {
+        AFL_ERROR(NKikimrServices::TX_COLUMNSHARD_SCAN)("event", "scan_termination")("deadline", GetComputeDeadline())("timeout", Timeout);
         SendScanError("ColumnShard scanner timeout: HAS_ACK=0");
         Finish(NColumnShard::TScanCounters::EStatusFinish::Deadline);
     } else {
+        AFL_WARN(NKikimrServices::TX_COLUMNSHARD_SCAN)("event", "scan_continue")("deadline", GetComputeDeadline())("timeout", Timeout)("now", TMonotonic::Now());
         ScheduleWakeup(TMonotonic::Now() + Timeout / 5);
     }
 }
@@ -406,7 +406,7 @@ void TColumnShardScan::SendScanError(const TString& reason) {
     auto issue = NYql::YqlIssue({}, NYql::TIssuesIds::KIKIMR_RESULT_UNAVAILABLE, msg);
     NYql::IssueToMessage(issue, ev->Record.MutableIssues()->Add());
     AFL_ERROR(NKikimrServices::TX_COLUMNSHARD_SCAN)("event", "scan_finish")("compute_actor_id", ScanComputeActorId)("stats", Stats->ToJson())(
-        "iterator", (ScanIterator ? ScanIterator->DebugString(false) : "NO"));
+        "iterator", (ScanIterator ? ScanIterator->DebugString(false) : "NO"))("reason", reason);
 
     Send(ScanComputeActorId, ev.Release());
 }