zclllyybb opened a new pull request, #19331:
URL: https://github.com/apache/doris/pull/19331
# Proposed changes
```
F0505 22:46:41.875746 497986 vdata_stream_recvr.cpp:87] Check failed:
_num_remaining_senders == 0 (26 vs. 0)
*** Check failure stack trace: ***
@ 0x55c8198dc95d google::LogMessage::Fail()
@ 0x55c8198dee99 google::LogMessage::SendToLog()
@ 0x55c8198dc4c6 google::LogMessage::Flush()
@ 0x55c8198df509 google::LogMessageFatal::~LogMessageFatal()
@ 0x55c81814cccb
doris::vectorized::VDataStreamRecvr::SenderQueue::_inner_get_batch()
@ 0x55c81815fa74
doris::vectorized::VDataStreamRecvr::PipSenderQueue::get_batch()
@ 0x55c818155072 doris::vectorized::VDataStreamRecvr::get_next()
@ 0x55c808360620 doris::vectorized::VExchangeNode::get_next()
@ 0x55c80071a114 doris::ExecNode::pull()
```
## Problem summary
the check of emptiness should be locked in the same lock of real use to
ensure correctness. usage before is defective. now fixed it.
## Checklist(Required)
* [ ] Does it affect the original behavior
* [ ] Has unit tests been added
* [ ] Has document been added or modified
* [ ] Does it need to update dependencies
* [x] Is this PR support rollback (If NO, please explain WHY)
## Further comments
the lock may could be split for the usage of the specific object.
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