vagetablechicken commented on a change in pull request #5111:
URL: https://github.com/apache/incubator-doris/pull/5111#discussion_r548948800
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File path: be/src/exec/olap_scan_node.cpp
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@@ -1250,12 +1250,25 @@ void OlapScanNode::transfer_thread(RuntimeState* state)
{
state->resource_pool()->release_thread_token(true);
VLOG(1) << "TransferThread finish.";
- std::unique_lock<std::mutex> l(_row_batches_lock);
- _transfer_done = true;
+ {
+ std::unique_lock<std::mutex> l(_row_batches_lock);
+ _transfer_done = true;
+ }
_row_batch_added_cv.notify_all();
+
+ std::unique_lock<std::mutex> l(_scan_batches_lock);
+ while (_running_thread != 0) {
+ l.unlock();
+ SleepFor(MonoDelta::FromMilliseconds(5));
+ l.lock();
Review comment:
I don't want use `_scan_batch_added_cv`, it's hard to understand the
relationship between `_scan_batch_added_cv` & `_running_thread `. I'll add a
new condition variable.
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