luoyuan3471 commented on PR #4726:
URL: https://github.com/apache/hadoop/pull/4726#issuecomment-1210199622
@yb12138 I want to ask two question:
+ @Override
+ public List<CSQueue> getChildQueuesByTryLock() {
+ try {
+ while (!readLock.tryLock()){
+ LockSupport.parkNanos(10000);
+ }
+ return new ArrayList<CSQueue>(childQueues);
+ } finally {
+ readLock.unlock();
+ }
+ }
1.Though you use tryLock and park, so refresh queue thread switch to block
state, but this thread still hold PremmptionManager lock ,so scheduler thread
still can allocate new container. Is it right?
2.Does this issue related to global Scheduler or just the preemption
function?
Looking forward to your reply, thanks!
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