Hello, Issue: Around mid-November 2017, ran into an issue with datanodes not coming up, and namenode therefore not coming out of safe node when we kerberized (MIT kerberos KDC) a cluster after we provisioned via Cloudbreak. Reference: https://issues.apache.org/jira/browse/HDFS-12029 https://access.redhat.com/errata/RHBA-2017:1674 https://community.hortonworks.com/articles/109940/after-os-patching-all-the-datanodes-nodes-are-up-b.html Temporary Fix: Hortonworks support was consulted, and they applied a temporary fix: Updated hadoop-env.sh configs in HDFS configs in ambari as follows: Original entry: export HADOOP_OPTS="-Djava.net.preferIPv4Stack=true ${HADOOP_OPTS}" With fix: export HADOOP_OPTS="-Djava.net.preferIPv4Stack=true -Xss1280k ${HADOOP_OPTS}” Restarted services and we were good to go. Strategic solution: Upgrade the underlying OS image to a version that includes a patch. 3.10.0-514.26.2.el7.x86_64 version, per the support engineer Reporting this since an upgrade is being worked, should have done it earlier 😞 @pdarvasi ... View more

Just found Cloudbreak missing in the marketplace. Please let me know if this is a Microsoft issue so I can escalate internally. I am in the middle of a PoC with strict timelines and am pretty badly impacted. Your support is much appreciated. ... View more