[jira] [Created] (FLINK-21902) A deadlock while using K8s HA service

["Yi Tang (Jira)" <ji...@apache.org>]

Yi Tang created FLINK-21902:
-------------------------------

             Summary: A deadlock while using K8s HA service
                 Key: FLINK-21902
                 URL: https://issues.apache.org/jira/browse/FLINK-21902
             Project: Flink
          Issue Type: Bug
            Reporter: Yi Tang


The `KubernetesStateHandleStore` using the same threadPoolExecutor with the Dispatcher to check `checkAndUpdateConfigMap`, which will lead to a deadlock.

example:
{code:java}
 private CompletableFuture<Void> removeJob(JobID jobId, CleanupJobState cleanupJobState)

{ final DispatcherJob job = checkNotNull(runningJobs.remove(jobId)); final CompletableFuture<Void> jobTerminationFuture = job.closeAsync(); return jobTerminationFuture.thenRunAsync( () -> cleanUpJobData(jobId, cleanupJobState.cleanupHAData), ioExecutor); }
{code}
 will finally call
{code:java}
 public CompletableFuture<Boolean> checkAndUpdateConfigMap(
 String configMapName,
 Function<KubernetesConfigMap, Optional<KubernetesConfigMap>> function) {
 ...
 CompletableFuture.supplyAsync(..., kubeClientExecutorService)
 ...
 }
{code}

And the ioExecutor and kubeClientExecutorService  is the same executor.



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