From a6423bf330c10089d7a0e2aaa8d971d0dcbb3fcf Mon Sep 17 00:00:00 2001
From: maybenotilya <maybenotilya@yandex-team.com>
Date: Fri, 17 Apr 2026 11:57:44 +0300
Subject: YT-26179: Add Abort for readers

* Changelog entry
  Type: feature
  Component: cpp-sdk

Add Abort for table readers
commit_hash:be5026883c90d18333f20468946f1e5a5b71839b
---
 yt/cpp/mapreduce/client/client_reader.cpp | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'yt/cpp/mapreduce/client/client_reader.cpp')

diff --git a/yt/cpp/mapreduce/client/client_reader.cpp b/yt/cpp/mapreduce/client/client_reader.cpp
index 1eade18397a..0bbc6fa1322 100644
--- a/yt/cpp/mapreduce/client/client_reader.cpp
+++ b/yt/cpp/mapreduce/client/client_reader.cpp
@@ -84,6 +84,11 @@ bool TClientReader::Retry(
     const TMaybe<ui64>& rowIndex,
     const std::exception_ptr& error)
 {
+    // We always stop retries if reader is aborted
+    if (IAbortableInputStream::IsAbortedError(error)) {
+        std::rethrow_exception(error);
+    }
+
     if (CurrentRequestRetryPolicy_) {
         TMaybe<TDuration> backoffDuration;
         try {
@@ -124,6 +129,16 @@ void TClientReader::ResetRetries()
     CurrentRequestRetryPolicy_ = nullptr;
 }
 
+void TClientReader::Abort()
+{
+    Input_->Abort();
+}
+
+bool TClientReader::IsAborted() const
+{
+    return Input_->IsAborted();
+}
+
 size_t TClientReader::DoRead(void* buf, size_t len)
 {
     return Input_->Read(buf, len);
@@ -178,7 +193,7 @@ void TClientReader::CreateRequest(const TMaybe<ui32>& rangeIndex, const TMaybe<u
         ranges->begin()->LowerLimit(TReadLimit().RowIndex(*rowIndex));
     }
 
-    Input_ = NDetail::RequestWithRetry<std::unique_ptr<IInputStream>>(
+    Input_ = NDetail::RequestWithRetry<std::unique_ptr<IAbortableInputStream>>(
         CurrentRequestRetryPolicy_,
         [this, &transactionId] (TMutationId /*mutationId*/) {
             return RawClient_->ReadTable(transactionId, Path_, Format_, Options_);
-- 
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