hcq/oceanbase
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

fix plan core whiling concurrently deleting plan

Browse Source
This commit is contained in:
obdev
2023-02-08 11:56:31 +08:00
committed by ob-robot
parent 2467fc57a7
commit e05475cdbc
3 changed files with 20 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
src/sql/plan_cache/ob_plan_cache_callback.cpp
View File

@ -49,11 +49,26 @@ int ObLibCacheAtomicOp::get_value(ObILibCacheNode *&cache_node)
return ret;
}
/*
worker thread: | evict thread
| get all plan id array(contains plan id x)
deleting .... remove plan id x |
from map |
dec ref cnt => ref_cnt=0 |
| ref plan id x. inc_ref=1
deleting plan x |
| acess plan x --> cause core!
*/
void ObCacheObjAtomicOp::operator()(ObjKV &entry)
{
if (NULL != entry.second) {
cache_obj_ = entry.second;
cache_obj_->inc_ref_count(ref_handle_);
if (0 == entry.second->get_ref_count()) {
// do nothing
} else {
cache_obj_ = entry.second;
cache_obj_->inc_ref_count(ref_handle_);
}
SQL_PC_LOG(DEBUG, "succ to get plan", "ref_count", cache_obj_->get_ref_count());
} else {
// do nothing