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From "Serhiy Boychenko (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13322) Comment in Kerberos file is not properly parsed
Date Mon, 27 Jun 2016 09:15:52 GMT
Serhiy Boychenko created HADOOP-13322:
-----------------------------------------

             Summary: Comment in Kerberos file is not properly parsed
                 Key: HADOOP-13322
                 URL: https://issues.apache.org/jira/browse/HADOOP-13322
             Project: Hadoop Common
          Issue Type: Bug
    Affects Versions: 2.6.0
            Reporter: Serhiy Boychenko
            Priority: Minor


Hello,

I am receiving an error when trying to authenticate with Kerberos:
Exception in thread "main" java.lang.IllegalArgumentException: Can't get Kerberos realm
	at org.apache.hadoop.security.HadoopKerberosName.setConfiguration(HadoopKerberosName.java:65)
	at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:263)
	at org.apache.hadoop.security.UserGroupInformation.setConfiguration(UserGroupInformation.java:299)
	at com.example.HadoopWorkloadParquetMain.main(HadoopWorkloadParquetMain.java:147)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at org.apache.hadoop.security.authentication.util.KerberosUtil.getDefaultRealm(KerberosUtil.java:81)
	at org.apache.hadoop.security.HadoopKerberosName.setConfiguration(HadoopKerberosName.java:63)
	... 3 more
Caused by: KrbException: Illegal config content:; comment
	at sun.security.krb5.Config.parseStanzaTable(Config.java:609)
	at sun.security.krb5.Config.<init>(Config.java:177)
	at sun.security.krb5.Config.getInstance(Config.java:98)
	... 9 more

The krb5.conf file, somewhere in the middle has a comment starting with semicolumn (;) and
it crashes the code. I have tried with the hash and it seems to be working properly. The krb5.conf
file has semicolumn-started comments in the beginning and those are getting parsed correctly,
what is breaking the code in the semicolumn in the middle of the configuration. The file looks
like:
; Some comment.
[libdefaults]
 default_realm = EXAMPLE.COM
 ...
; comment
[realms]
 EXAMPLE.ORG = {
  ...
 }

I have been looking into the Web to understand if both characters can be used as comments
and it seems they can according to the following resource:
https://groups.google.com/forum/#!topic/comp.protocols.kerberos/i_Cl2d7TLGU

Thank you,
Serhiy.



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