Initialize Fair share thread pool threads correctly

* Changelog entry
Type: fix
Component: misc-server

Fixed bad initialization of threads within fair-share thread pool.
commit_hash:1db38c436c8ed4de3b5b86b7dab7e5bd8e1a3100

1 files changed, 3 insertions, 2 deletions

diff --git a/yt/yt/core/concurrency/two_level_fair_share_thread_pool.cpp b/yt/yt/core/concurrency/two_level_fair_share_thread_pool.cpp
index 4ca3f55a555..5661ba78120 100644
--- a/yt/yt/core/concurrency/two_level_fair_share_thread_pool.cpp
+++ b/yt/yt/core/concurrency/two_level_fair_share_thread_pool.cpp
@@ -1272,7 +1272,8 @@ public:
         : TSchedulerThread(
             std::move(callbackEventCount),
             threadGroupName,
-            threadName)
+            threadName,
+            {.ThreadInitializer = [this] () { Initialize(); }})
         , Queue_(std::move(queue))
         , Index_(index)
     { }
@@ -1281,7 +1282,7 @@ protected:
     const TTwoLevelFairShareQueuePtr Queue_;
     const int Index_;
 
-    void OnStart() override
+    void Initialize()
     {
         ThreadCookie() = TTaggedPtr(Queue_.Get(), static_cast<ui16>(Index_)).Pack();
     }