[ 
https://issues.apache.org/jira/browse/FLINK-34960?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Kunal Rohitas updated FLINK-34960:
----------------------------------
    Description: 
While using the autoscaler for session jobs, the operator throws a 
NullPointerException while trying to apply parallelism overrides, though it's 
able to generate parallelism suggestion report for scaling. The versions used 
here are flink-1.18.1 and flink-kubernetes-operator-1.8.0. 
{code:java}
2024-03-26 08:41:21,617 o.a.f.a.JobAutoScalerImpl 
[ERROR][default/clientsession-job] Error applying overrides. 
java.lang.NullPointerException at 
org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:52)
 at 
org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:40)
 at 
org.apache.flink.autoscaler.JobAutoScalerImpl.applyParallelismOverrides(JobAutoScalerImpl.java:161)
 at 
org.apache.flink.autoscaler.JobAutoScalerImpl.scale(JobAutoScalerImpl.java:111) 
at 
org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.applyAutoscaler(AbstractFlinkResourceReconciler.java:192)
 at 
org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.reconcile(AbstractFlinkResourceReconciler.java:139)
 at 
org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:116)
 at 
org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:53)
 at 
io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:152)
 at 
io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:110)
 at 
org.apache.flink.kubernetes.operator.metrics.OperatorJosdkMetrics.timeControllerExecution(OperatorJosdkMetrics.java:80)
 at 
io.javaoperatorsdk.operator.processing.Controller.reconcile(Controller.java:109)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.reconcileExecution(ReconciliationDispatcher.java:140)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleReconcile(ReconciliationDispatcher.java:121)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleDispatch(ReconciliationDispatcher.java:91)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleExecution(ReconciliationDispatcher.java:64)
 at 
io.javaoperatorsdk.operator.processing.event.EventProcessor$ReconcilerExecutor.run(EventProcessor.java:417)
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
at java.base/java.lang.Thread.run(Unknown Source){code}
 
{code:java}
2024-03-26 08:41:21,617 o.a.f.a.JobAutoScalerImpl 
[ERROR][default/clientsession-job] Error while scaling job 
java.lang.NullPointerException at 
org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:52)
 at 
org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:40)
 at 
org.apache.flink.autoscaler.JobAutoScalerImpl.applyParallelismOverrides(JobAutoScalerImpl.java:161)
 at 
org.apache.flink.autoscaler.JobAutoScalerImpl.scale(JobAutoScalerImpl.java:111) 
at 
org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.applyAutoscaler(AbstractFlinkResourceReconciler.java:192)
 at 
org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.reconcile(AbstractFlinkResourceReconciler.java:139)
 at 
org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:116)
 at 
org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:53)
 at 
io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:152)
 at 
io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:110)
 at 
org.apache.flink.kubernetes.operator.metrics.OperatorJosdkMetrics.timeControllerExecution(OperatorJosdkMetrics.java:80)
 at 
io.javaoperatorsdk.operator.processing.Controller.reconcile(Controller.java:109)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.reconcileExecution(ReconciliationDispatcher.java:140)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleReconcile(ReconciliationDispatcher.java:121)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleDispatch(ReconciliationDispatcher.java:91)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleExecution(ReconciliationDispatcher.java:64)
 at 
io.javaoperatorsdk.operator.processing.event.EventProcessor$ReconcilerExecutor.run(EventProcessor.java:417)
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
at java.base/java.lang.Thread.run(Unknown Source){code}
The document suggests to use latest custom build of 1.18 or 1.19 that contains 
https://issues.apache.org/jira/browse/FLINK-33534 but a NullPointerException 
should never happen ?

  was:
While using the autoscaler for session jobs, the operator throws a 
NullPointerException while trying to apply parallelism overrides, though it's 
able to generate parallelism suggestion report for scaling. The versions used 
here are flink-1.18.1 and flink-kubernetes-operator-1.8.0. 
{code:java}
2024-03-26 08:41:21,617 o.a.f.a.JobAutoScalerImpl 
[ERROR][default/clientsession-job] Error applying overrides. 
java.lang.NullPointerException at 
org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:52)
 at 
org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:40)
 at 
org.apache.flink.autoscaler.JobAutoScalerImpl.applyParallelismOverrides(JobAutoScalerImpl.java:161)
 at 
org.apache.flink.autoscaler.JobAutoScalerImpl.scale(JobAutoScalerImpl.java:111) 
at 
org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.applyAutoscaler(AbstractFlinkResourceReconciler.java:192)
 at 
org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.reconcile(AbstractFlinkResourceReconciler.java:139)
 at 
org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:116)
 at 
org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:53)
 at 
io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:152)
 at 
io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:110)
 at 
org.apache.flink.kubernetes.operator.metrics.OperatorJosdkMetrics.timeControllerExecution(OperatorJosdkMetrics.java:80)
 at 
io.javaoperatorsdk.operator.processing.Controller.reconcile(Controller.java:109)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.reconcileExecution(ReconciliationDispatcher.java:140)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleReconcile(ReconciliationDispatcher.java:121)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleDispatch(ReconciliationDispatcher.java:91)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleExecution(ReconciliationDispatcher.java:64)
 at 
io.javaoperatorsdk.operator.processing.event.EventProcessor$ReconcilerExecutor.run(EventProcessor.java:417)
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
at java.base/java.lang.Thread.run(Unknown Source){code}
 
{code:java}
2024-03-26 08:41:21,617 o.a.f.a.JobAutoScalerImpl 
[ERROR][default/clientsession-job] Error while scaling job 
java.lang.NullPointerException at 
org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:52)
 at 
org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:40)
 at 
org.apache.flink.autoscaler.JobAutoScalerImpl.applyParallelismOverrides(JobAutoScalerImpl.java:161)
 at 
org.apache.flink.autoscaler.JobAutoScalerImpl.scale(JobAutoScalerImpl.java:111) 
at 
org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.applyAutoscaler(AbstractFlinkResourceReconciler.java:192)
 at 
org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.reconcile(AbstractFlinkResourceReconciler.java:139)
 at 
org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:116)
 at 
org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:53)
 at 
io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:152)
 at 
io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:110)
 at 
org.apache.flink.kubernetes.operator.metrics.OperatorJosdkMetrics.timeControllerExecution(OperatorJosdkMetrics.java:80)
 at 
io.javaoperatorsdk.operator.processing.Controller.reconcile(Controller.java:109)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.reconcileExecution(ReconciliationDispatcher.java:140)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleReconcile(ReconciliationDispatcher.java:121)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleDispatch(ReconciliationDispatcher.java:91)
 at 
io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleExecution(ReconciliationDispatcher.java:64)
 at 
io.javaoperatorsdk.operator.processing.event.EventProcessor$ReconcilerExecutor.run(EventProcessor.java:417)
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
at java.base/java.lang.Thread.run(Unknown Source){code}
{code:java}
 {code}
The document suggests to use latest custom build of 1.18 or 1.19 that contains 
https://issues.apache.org/jira/browse/FLINK-33534 but a NullPointerException 
should never happen ?


> NullPointerException while applying parallelism overrides for session jobs
> --------------------------------------------------------------------------
>
>                 Key: FLINK-34960
>                 URL: https://issues.apache.org/jira/browse/FLINK-34960
>             Project: Flink
>          Issue Type: Bug
>          Components: Kubernetes Operator
>    Affects Versions: 1.8.0
>            Reporter: Kunal Rohitas
>            Priority: Major
>
> While using the autoscaler for session jobs, the operator throws a 
> NullPointerException while trying to apply parallelism overrides, though it's 
> able to generate parallelism suggestion report for scaling. The versions used 
> here are flink-1.18.1 and flink-kubernetes-operator-1.8.0. 
> {code:java}
> 2024-03-26 08:41:21,617 o.a.f.a.JobAutoScalerImpl 
> [ERROR][default/clientsession-job] Error applying overrides. 
> java.lang.NullPointerException at 
> org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:52)
>  at 
> org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:40)
>  at 
> org.apache.flink.autoscaler.JobAutoScalerImpl.applyParallelismOverrides(JobAutoScalerImpl.java:161)
>  at 
> org.apache.flink.autoscaler.JobAutoScalerImpl.scale(JobAutoScalerImpl.java:111)
>  at 
> org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.applyAutoscaler(AbstractFlinkResourceReconciler.java:192)
>  at 
> org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.reconcile(AbstractFlinkResourceReconciler.java:139)
>  at 
> org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:116)
>  at 
> org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:53)
>  at 
> io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:152)
>  at 
> io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:110)
>  at 
> org.apache.flink.kubernetes.operator.metrics.OperatorJosdkMetrics.timeControllerExecution(OperatorJosdkMetrics.java:80)
>  at 
> io.javaoperatorsdk.operator.processing.Controller.reconcile(Controller.java:109)
>  at 
> io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.reconcileExecution(ReconciliationDispatcher.java:140)
>  at 
> io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleReconcile(ReconciliationDispatcher.java:121)
>  at 
> io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleDispatch(ReconciliationDispatcher.java:91)
>  at 
> io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleExecution(ReconciliationDispatcher.java:64)
>  at 
> io.javaoperatorsdk.operator.processing.event.EventProcessor$ReconcilerExecutor.run(EventProcessor.java:417)
>  at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
> Source) at 
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
> at java.base/java.lang.Thread.run(Unknown Source){code}
>  
> {code:java}
> 2024-03-26 08:41:21,617 o.a.f.a.JobAutoScalerImpl 
> [ERROR][default/clientsession-job] Error while scaling job 
> java.lang.NullPointerException at 
> org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:52)
>  at 
> org.apache.flink.kubernetes.operator.autoscaler.KubernetesScalingRealizer.realizeParallelismOverrides(KubernetesScalingRealizer.java:40)
>  at 
> org.apache.flink.autoscaler.JobAutoScalerImpl.applyParallelismOverrides(JobAutoScalerImpl.java:161)
>  at 
> org.apache.flink.autoscaler.JobAutoScalerImpl.scale(JobAutoScalerImpl.java:111)
>  at 
> org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.applyAutoscaler(AbstractFlinkResourceReconciler.java:192)
>  at 
> org.apache.flink.kubernetes.operator.reconciler.deployment.AbstractFlinkResourceReconciler.reconcile(AbstractFlinkResourceReconciler.java:139)
>  at 
> org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:116)
>  at 
> org.apache.flink.kubernetes.operator.controller.FlinkSessionJobController.reconcile(FlinkSessionJobController.java:53)
>  at 
> io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:152)
>  at 
> io.javaoperatorsdk.operator.processing.Controller$1.execute(Controller.java:110)
>  at 
> org.apache.flink.kubernetes.operator.metrics.OperatorJosdkMetrics.timeControllerExecution(OperatorJosdkMetrics.java:80)
>  at 
> io.javaoperatorsdk.operator.processing.Controller.reconcile(Controller.java:109)
>  at 
> io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.reconcileExecution(ReconciliationDispatcher.java:140)
>  at 
> io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleReconcile(ReconciliationDispatcher.java:121)
>  at 
> io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleDispatch(ReconciliationDispatcher.java:91)
>  at 
> io.javaoperatorsdk.operator.processing.event.ReconciliationDispatcher.handleExecution(ReconciliationDispatcher.java:64)
>  at 
> io.javaoperatorsdk.operator.processing.event.EventProcessor$ReconcilerExecutor.run(EventProcessor.java:417)
>  at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
> Source) at 
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
> at java.base/java.lang.Thread.run(Unknown Source){code}
> The document suggests to use latest custom build of 1.18 or 1.19 that 
> contains https://issues.apache.org/jira/browse/FLINK-33534 but a 
> NullPointerException should never happen ?



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