From 02c9bf087e50885bbc8028415c4e674947ee7a16 Mon Sep 17 00:00:00 2001
From: Xin Liu <xliu@openjdk.org>
Date: Wed, 16 Jun 2021 23:54:21 +0000
Subject: [PATCH] 8268852: AsyncLogWriter should not overide is_Named_thread()

Reviewed-by: dholmes, ysuenaga
---
 src/hotspot/share/logging/logAsyncWriter.hpp | 1 -
 src/hotspot/share/runtime/thread.cpp         | 4 +++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/hotspot/share/logging/logAsyncWriter.hpp b/src/hotspot/share/logging/logAsyncWriter.hpp
index 736a957b218..d80afe7eda7 100644
--- a/src/hotspot/share/logging/logAsyncWriter.hpp
+++ b/src/hotspot/share/logging/logAsyncWriter.hpp
@@ -157,7 +157,6 @@ class AsyncLogWriter : public NonJavaThread {
     log_debug(logging, thread)("starting AsyncLog Thread tid = " INTX_FORMAT, os::current_thread_id());
   }
   char* name() const override { return (char*)"AsyncLog Thread"; }
-  bool is_Named_thread() const override { return true; }
   void print_on(outputStream* st) const override {
     st->print("\"%s\" ", name());
     Thread::print_on(st);
diff --git a/src/hotspot/share/runtime/thread.cpp b/src/hotspot/share/runtime/thread.cpp
index 3ff07b2676e..0c31e502a03 100644
--- a/src/hotspot/share/runtime/thread.cpp
+++ b/src/hotspot/share/runtime/thread.cpp
@@ -646,7 +646,9 @@ void Thread::print_on_error(outputStream* st, char* buf, int buflen) const {
   else if (is_GC_task_thread())       { st->print("GCTaskThread"); }
   else if (is_Watcher_thread())       { st->print("WatcherThread"); }
   else if (is_ConcurrentGC_thread())  { st->print("ConcurrentGCThread"); }
-  else                                { st->print("Thread"); }
+  else if (this == AsyncLogWriter::instance()) {
+    st->print("%s", this->name());
+  } else                                { st->print("Thread"); }
 
   if (is_Named_thread()) {
     st->print(" \"%s\"", name());