[GitHub] [spark] igorcalabria opened a new pull request #26152: [SPARK-27812][K8S][2.4] Bump K8S client version to 4.6.1

[GitBox <gi...@apache.org>]

igorcalabria opened a new pull request #26152: [SPARK-27812][K8S][2.4] Bump K8S client version to 4.6.1
URL: https://github.com/apache/spark/pull/26152
 
 
   # What changes were proposed in this pull request?
   
   Backport of #26093 to `branch-2.4`
   
   ### Why are the changes needed?
   
   https://issues.apache.org/jira/browse/SPARK-27812
   https://issues.apache.org/jira/browse/SPARK-27927
   
   We need this fix https://github.com/fabric8io/kubernetes-client/pull/1768 that was released on version 4.6 of the client. The root cause of the problem is better explained in https://github.com/apache/spark/pull/25785
   
   ### Does this PR introduce any user-facing change?
   
   No
   
   ### How was this patch tested?
   
   This patch was tested manually using a simple pyspark job
   
   ```python
   from pyspark.sql import SparkSession
   
   if __name__ == '__main__':
       spark = SparkSession.builder.getOrCreate()
   ```
   
   The expected behaviour of this "job" is that both python's and jvm's process exit automatically after the main runs. This is the case for spark versions <= 2.4. On version 2.4.3, the jvm process hangs because there's a non daemon thread running 
   
   ```
   "OkHttp WebSocket https://10.96.0.1/..." #121 prio=5 os_prio=0 tid=0x00007fb27c005800 nid=0x24b waiting on condition [0x00007fb300847000]
   "OkHttp WebSocket https://10.96.0.1/..." #117 prio=5 os_prio=0 tid=0x00007fb28c004000 nid=0x247 waiting on condition [0x00007fb300e4b000]
   ```
   This is caused by a bug on `kubernetes-client` library, which is fixed on the version that we are upgrading to.
   
   When the mentioned job is run with this patch applied, the behaviour from spark <= 2.4.0 is restored and both processes terminate successfully  
   

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