[jira] [Created] (FLINK-17958) Kubernetes session constantly allocates taskmanagers after cancel a job

["Yang Wang (Jira)" <ji...@apache.org>]

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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