cannot read blob message has been improved (ydb-platform#15323)

Author: dorooleg

ydb/core/kqp/ut/olap/tiering_ut.cpp

@@ -227,7 +227,7 @@ Y_UNIT_TEST_SUITE(KqpOlapTiering) {
             auto it = tableClient.StreamExecuteScanQuery(selectQuery, NYdb::NTable::TStreamExecScanQuerySettings()).GetValueSync();
             auto streamPart = it.ReadNext().GetValueSync();
             UNIT_ASSERT(!streamPart.IsSuccess());
-            UNIT_ASSERT_STRING_CONTAINS(streamPart.GetIssues().ToString(), "cannot read blob range");
+            UNIT_ASSERT_STRING_CONTAINS(streamPart.GetIssues().ToString(), "reading blob range for data");
         }
 
         testHelper.CreateTier("tier1");

ydb/core/tx/columnshard/engines/reader/common_reader/iterator/constructor.cpp

@@ -19,7 +19,7 @@ bool TBlobsFetcherTask::DoOnError(const TString& storageId, const TBlobRange& ra
         "storage_id", storageId);
     NActors::TActorContext::AsActorContext().Send(
         Context->GetCommonContext()->GetScanActorId(), std::make_unique<NColumnShard::TEvPrivate::TEvTaskProcessedResult>(
-                                                           TConclusionStatus::Fail("cannot read blob range " + range.ToString())));
+                                                           TConclusionStatus::Fail(TStringBuilder{} << "Error reading blob range for data: " << range.ToString() << ", error: " << status.GetErrorMessage() << ", status: " << NKikimrProto::EReplyStatus_Name(status.GetStatus()))));
     return false;
 }
 

ydb/core/tx/columnshard/engines/reader/common_reader/iterator/constructor.h

@@ -58,7 +58,7 @@ class TColumnsFetcherTask: public NBlobOperations::NRead::ITask, public NColumnS
             "status_code", status.GetStatus())("storage_id", storageId);
         NActors::TActorContext::AsActorContext().Send(Source->GetContext()->GetCommonContext()->GetScanActorId(),
             std::make_unique<NColumnShard::TEvPrivate::TEvTaskProcessedResult>(
-                TConclusionStatus::Fail("cannot read blob range " + range.ToString())));
+                TConclusionStatus::Fail(TStringBuilder{} << "Error reading blob range for columns: " << range.ToString() << ", error: " << status.GetErrorMessage() << ", status: " << NKikimrProto::EReplyStatus_Name(status.GetStatus()))));
         return false;
     }