jlpedrosa commented on a change in pull request #24702: [Minor] [Kubernetes] [Core] Added retries on the connection to the driver for k8s URL: https://github.com/apache/spark/pull/24702#discussion_r291926003
########## 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: Hi @srowen @skonto The problem with Java and negative resolution is the moment you have ANY timeout in DNS resolution, you'll never be able to resolve that name. Which in some Kubernetes scenarios happens (pods network taking time to get fully operational). Basically no matter how many retries it will never work if you have a timeout. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
