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https://issues.apache.org/jira/browse/HADOOP-14636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16079607#comment-16079607
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Steve Loughran commented on HADOOP-14636:
-----------------------------------------

bq. and/or Configuration can't deal with empty env vars.

the latter; doesn't resolve or reject any empty props. 

Java should be looking at PATH for library load too, shouldn't it? Certainly on 
windows I'd expect it, as that's how DLLs get resolved. Don't know about 
unix-land.

> TestKDiag failing intermittently on Jenkins/Yetus at login from keytab
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-14636
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14636
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security, test
>    Affects Versions: 3.0.0-beta1
>         Environment: {code}
> user.name = "jenkins"
> java.version = "1.8.0_131"
> java.security.krb5.conf = 
> "/testptch/hadoop/hadoop-common-project/hadoop-common/target/1499472499650/krb5.conf"
> kdc.resource.dir = "src/test/resources/kdc"
> hadoop.kerberos.kinit.command = "kinit"
> hadoop.security.authentication = "KERBEROS"
> hadoop.security.authorization = "false"
> hadoop.kerberos.min.seconds.before.relogin = "60"
> hadoop.security.dns.interface = "(unset)"
> hadoop.security.dns.nameserver = "(unset)"
> hadoop.rpc.protection = "authentication"
> hadoop.security.saslproperties.resolver.class = "(unset)"
> hadoop.security.crypto.codec.classes = "(unset)"
> hadoop.security.group.mapping = 
> "org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback"
> hadoop.security.impersonation.provider.class = "(unset)"
> dfs.data.transfer.protection = "(unset)"
> dfs.data.transfer.saslproperties.resolver.class = "(unset)"
> 2017-07-08 00:08:20,381 WARN  security.KDiag (KDiag.java:execute(365)) - The 
> default cluster security is insecure
> {code}
>            Reporter: Steve Loughran
>            Priority: Minor
>         Attachments: output.txt
>
>
> The test {{TestKDiag}} is failing intermittently on Yetus builds, 
> {code}
> org.apache.hadoop.security.KerberosAuthException: Login failure for user: 
> [email protected] from keytab 
> /testptch/hadoop/hadoop-common-project/hadoop-common/target/keytab 
> javax.security.auth.login.LoginException: Unable to obtain password from user
> {code}
> The tests that fail are all trying to log in using a keytab just created, the 
> JVM isn't having any of it.
> Possible causes? I can think of a few to start with
> # keytab generation
> # keytab path parameter wrong
> # JVM isn't doing the login
> # some race condition
> # Host OS
> # Other environment issues (clock, network...)
> There's no recent changes in the kdiag or UGI code.
> The failure is intermittent, not surfacing for me (others?) locally, which 
> which could point at: JVM, host OS, race condition, other env  issues.



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