srowen commented on a change in pull request #24702: [SPARK-27989] [Kubernetes] 
[Core] Added retries on the connection to the driver for k8s
URL: https://github.com/apache/spark/pull/24702#discussion_r293355696
 
 

 ##########
 File path: 
resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile
 ##########
 @@ -51,6 +51,8 @@ ENV SPARK_HOME /opt/spark
 
 WORKDIR /opt/spark/work-dir
 RUN chmod g+w /opt/spark/work-dir
+#Disable negative dns reslolution 
https://docs.oracle.com/javase/8/docs/technotes/guides/net/properties.html
+RUN sed -i -e 
's/networkaddress.cache.negative.ttl=10/networkaddress.cache.negative.ttl=0/g'  
/usr/lib/jvm/java-1.8-openjdk/jre/lib/security/java.security
 
 Review comment:
   I'm neutral on that. It seems like a non-trivial change to the whole JVM to 
work around an env-specific DNS issue.

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