Mryange opened a new pull request, #28814:
URL: https://github.com/apache/doris/pull/28814
## Proposed changes
pipeline logic
``` C++
_sink->channel_all_can_write();
for (auto channel : _channels) {
if (!channel->can_write()) {
return false;
}
}
bool can_write() {
if (!is_local()) {
return true;
}
// if local recvr queue mem over the exchange node mem limit, we
must ensure each queue
// has one block to do merge sort in exchange node to prevent the
logic dead lock
return !_local_recvr || _local_recvr->is_closed() ||
!_local_recvr->exceeds_limit(0) ||
_local_recvr->sender_queue_empty(_parent->sender_id());
}
```
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