[jira] [Created] (SPARK-32067) [K8s] Pod template from subsequently submission inadvertently applies to the ongoing submission

["James Yu (Jira)" <ji...@apache.org>]

James Yu created SPARK-32067:
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             Summary: [K8s] Pod template from subsequently submission inadvertently applies to the ongoing submission
                 Key: SPARK-32067
                 URL: https://issues.apache.org/jira/browse/SPARK-32067
             Project: Spark
          Issue Type: Bug
          Components: Kubernetes
    Affects Versions: 3.0.0, 2.4.6
            Reporter: James Yu


THE BUG:

The bug is reproducible by spark-submit two different apps (app1 and app2) with different pod templates to K8s sequentially, and app2 launches while app1 is still ramping up all its executor pods. The unwanted result is that some launched executor pods of app1 appear to have app2's pod template applied.

The root cause is that app1's podspec-configmap got overwritten by app2 during the launching period because the configmap names of the two apps are the same. This causes some app1's executor pods being ramped up after app2 is launched to be inadvertently launched with the app2's pod template.

# Launch app1
{code:java}
NAMESPACE    NAME                                       DATA    AGE
default      app1-1111111111111111-driver-conf-map      1       9m46s
default      podspec-configmap                          1       12m{code}

# Then launch app2 while app1 is still ramping up its executors
{code:java}
NAMESPACE    NAME                                       DATA    AGE
default      app1-1111111111111111-driver-conf-map      1       11m43s
default      app2-2222222222222222-driver-conf-map      1       10s
default      podspec-configmap                          1       13m57s{code}
 

PROPOSED SOLUTION:

Properly prefix the podspec-configmap for each submitted app.
{code:java}
NAMESPACE    NAME                                       DATA    AGE
default      app1-1111111111111111-driver-conf-map      1       11m43s
default      app2-2222222222222222-driver-conf-map      1       10s
default      app1-1111111111111111-podspec-configmap    1       13m57s
default      app2-2222222222222222-podspec-configmap    1       13m57s{code}



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