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Posted to yarn-dev@hadoop.apache.org by "Aihua Xu (JIRA)" <ji...@apache.org> on 2019/02/12 23:28:00 UTC

[jira] [Created] (YARN-9297) Renaming RM could cause application to crash

Aihua Xu created YARN-9297:
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             Summary: Renaming RM could cause application to crash
                 Key: YARN-9297
                 URL: https://issues.apache.org/jira/browse/YARN-9297
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: security
    Affects Versions: 2.6.0
            Reporter: Aihua Xu


In this line, we are throwing UnknownHostException when any RM host can't resolve to ip address. 
https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/SecurityUtil.java#L448

There are some cases that one RM needs to rename or map to different ip address, then it will crash the application although other RMs are running fine. 



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