acelyc111 commented on a change in pull request #5660:
URL: https://github.com/apache/incubator-doris/pull/5660#discussion_r613847503



##########
File path: be/src/agent/task_worker_pool.cpp
##########
@@ -316,6 +316,7 @@ void 
TaskWorkerPool::_create_tablet_worker_thread_callback() {
         TCreateTabletReq create_tablet_req;
         {
             lock_guard<Mutex> worker_thread_lock(_worker_thread_lock);
+            TRACE("get worker thread lock");

Review comment:
       Trace is created in line 407, TRACE here has no effect

##########
File path: be/src/agent/task_worker_pool.cpp
##########
@@ -402,6 +404,17 @@ void TaskWorkerPool::_drop_tablet_worker_thread_callback() 
{
             _tasks.pop_front();
         }
 
+        scoped_refptr<Trace> trace(new Trace);
+        MonotonicStopWatch watch;
+        watch.start();
+        SCOPED_CLEANUP({
+            if (watch.elapsed_time() / 1e9 > 
config::agent_task_trace_threshold_sec) {
+                LOG(WARNING) << "Trace:" << std::endl << 
trace->DumpToString(Trace::INCLUDE_ALL);
+            }
+        });

Review comment:
       Better to define a macro for these code, it's duplicate with code in 
ceate tablet, and if you add more traces for other tasks, there will be manu 
duplicate code.

##########
File path: be/src/agent/task_worker_pool.cpp
##########
@@ -390,6 +391,7 @@ void TaskWorkerPool::_drop_tablet_worker_thread_callback() {
         TDropTabletReq drop_tablet_req;
         {
             lock_guard<Mutex> worker_thread_lock(_worker_thread_lock);
+            TRACE("get worker thread lock");

Review comment:
       Same as above

##########
File path: be/src/agent/task_worker_pool.cpp
##########
@@ -402,6 +404,17 @@ void TaskWorkerPool::_drop_tablet_worker_thread_callback() 
{
             _tasks.pop_front();
         }
 
+        scoped_refptr<Trace> trace(new Trace);
+        MonotonicStopWatch watch;
+        watch.start();
+        SCOPED_CLEANUP({
+            if (watch.elapsed_time() / 1e9 > 
config::agent_task_trace_threshold_sec) {
+                LOG(WARNING) << "Trace:" << std::endl << 
trace->DumpToString(Trace::INCLUDE_ALL);
+            }
+        });
+        ADOPT_TRACE(trace.get());
+        
+        TRACE("begin to drop tablet");

Review comment:
       How about add another TRACE after line 422 when tablet got?




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