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https://issues.apache.org/jira/browse/HIVE-19900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16513040#comment-16513040
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BELUGA BEHR edited comment on HIVE-19900 at 6/14/18 9:50 PM:
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This only affects the deprecated HiveCLI and only applies to HoS. The
workaround is to use shorter user names when necessary.
was (Author: belugabehr):
This only effects the deprecated HiveCLI and the workaround is to use shorter
user names when necessary.
> HiveCLI HoS Performs Invalid Impersonation If User Name Truncated
> -----------------------------------------------------------------
>
> Key: HIVE-19900
> URL: https://issues.apache.org/jira/browse/HIVE-19900
> Project: Hive
> Issue Type: Improvement
> Components: CLI, Spark
> Affects Versions: 1.2.2, 3.0.0, 2.3.2, 4.0.0
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Minor
> Fix For: 1.2.3, 2.3.3, 4.0.0
>
>
> The HiveCLI HoS code relies on the system property {{user.name}} when
> performing impersonations. The code decides to do an impersonation if the
> {{user.name}} system property does not match the current user who is
> launching the HiveCLI client. However, when confronted with a long user
> name, some shells and linux distros may opt to truncate the user name to a
> certain size to conserve screen space. In these scenarios, the current user
> name does not match the {{user.name}} system property and never will, so
> impersonation will always happen, even though the user is trying to
> impersonate themselves. If YARN is not setup to allow the current user to
> impersonate, YARN will reject the request.
> {code:java}
> if (hiveConf.getBoolVar(HiveConf.ConfVars.HIVE_SERVER2_ENABLE_DOAS)) {
> try {
> String currentUser = Utils.getUGI().getShortUserName();
> // do not do impersonation in CLI mode
> if (!currentUser.equals(System.getProperty("user.name"))) {
> LOG.info("Attempting impersonation of " + currentUser);
> addProxyUser(currentUser);
> }
> } catch (Exception e) {
> String msg = "Cannot obtain username: " + e;
> throw new IllegalStateException(msg, e);
> }
> }
> {code}
>
> [https://github.com/apache/hive/blob/da66386662fbbcbde9501b4a7b27d076bcc790d4/spark-client/src/main/java/org/apache/hive/spark/client/AbstractSparkClient.java#L354-L366]
> Assuming a kerberos enabled environment, the error message in the YARN
> Resource Manager will be:
> {code:java}
> [email protected] is not allowed to
> impersonate my-really-really-long-user-name
> {code}
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