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The following commit(s) were added to refs/heads/master by this push:
new 13b9350aebb [Bug](scan)fix some case query timeout of not schedule
scanner (#28243)
13b9350aebb is described below
commit 13b9350aebb2e800040c7d58fd63d73d10d196b0
Author: zhangstar333 <[email protected]>
AuthorDate: Tue Dec 12 21:00:22 2023 +0800
[Bug](scan)fix some case query timeout of not schedule scanner (#28243)
now in pipeline, when result block queue is empty, will be reschedule, and
then choose a batch of scanner,
but sometimes, get_available_thread_slot_num() will return thread_slot_num
<= 0, so it's will do nothing,
and then block queue will always empty.
have no chance to reschedule again until query timeout.
---
be/src/vec/exec/scan/scanner_context.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/be/src/vec/exec/scan/scanner_context.h
b/be/src/vec/exec/scan/scanner_context.h
index 33d2162906d..a1824bf193d 100644
--- a/be/src/vec/exec/scan/scanner_context.h
+++ b/be/src/vec/exec/scan/scanner_context.h
@@ -161,6 +161,9 @@ public:
int thread_slot_num = 0;
thread_slot_num = (allowed_blocks_num() + _block_per_scanner - 1) /
_block_per_scanner;
thread_slot_num = std::min(thread_slot_num, _max_thread_num -
_num_running_scanners);
+ if (thread_slot_num <= 0) {
+ thread_slot_num = 1;
+ }
return thread_slot_num;
}
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