Yang Wang created FLINK-17958:
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Summary: Kubernetes session constantly allocates taskmanagers after cancel a job
Key: FLINK-17958
URL:
https://issues.apache.org/jira/browse/FLINK-17958 Project: Flink
Issue Type: Bug
Components: Runtime / Coordination
Affects Versions: 1.11.0, 1.12.0
Reporter: Yang Wang
Fix For: 1.11.0
When i am testing the {{kubernetes-session.sh}}, i find that the {{KubernetesResourceManager}} will constantly allocate taskmanager after cancel a job. I think it may be caused by a bug of the following code. When the {{dividend}} is 0 and {{divisor}} is bigger than 1, the return value will be 1. However, we expect it to be 0.
{code:java}
/**
* Divide and rounding up to integer.
* E.g., divideRoundUp(3, 2) returns 2.
* @param dividend value to be divided by the divisor
* @param divisor value by which the dividend is to be divided
* @return the quotient rounding up to integer
*/
public static int divideRoundUp(int dividend, int divisor) {
return (dividend - 1) / divisor + 1;
}{code}
How to reproduce this issue?
# Start a Kubernetes session
# Submit a Flink job to the existing session
# Cancel the job and wait for the TaskManager released via idle timeout
# More and more TaskManagers will be allocated
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