Bibin A Chundatt created YARN-4254: -------------------------------------- Summary: ApplicationAttempt stuck for ever due to UnknowHostexception Key: YARN-4254 URL: https://issues.apache.org/jira/browse/YARN-4254 Project: Hadoop YARN Issue Type: Bug Reporter: Bibin A Chundatt Assignee: Bibin A Chundatt
Scenario ======= 1. RM HA and 5 NMs available in cluster and are working fine 2. Add one more NM to the same cluster but RM /etc/hosts not updated. 3. Submit application to the same cluster If Am get allocated to the newly added NM the *application attempt will get stuck for ever*.User will not get to know why the same happened. Impact 1.RM logs gets overloaded with exception 2.Application gets stuck for ever. Handling suggestion YARN-261 allows for Fail application attempt . If we fail the same next attempt could get assigned to another NM. -- This message was sent by Atlassian JIRA (v6.3.4#6332)