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https://issues.apache.org/jira/browse/HDFS-12974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16309210#comment-16309210
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fang zhenyi commented on HDFS-12974:
------------------------------------

Thanks [~xiaochen] for giving me sugesstion.
I find that AuthorizationException class does not provide the stack trace. The 
exception I got from creating the encrypted zone was an AuthorizationException.
StringUtils # stringifyException Requires the stack trace to return the 
result.StringUtils # stringifyException will return null if exception is 
AuthorizationException.So CryptoAdmin#prettifyException can not get useful 
exeception infomation. Do you have any better suggestions to fix it? I am very 
happy to get your sugesstions.


AuthorizationException.java
{code:java}
/**
 * An exception class for authorization-related issues.
 * 
 * This class <em>does not</em> provide the stack trace for security purposes.
 */
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class AuthorizationException extends AccessControlException {
{code} .

StringUtils # stringifyException
{code:java}
  public static String stringifyException(Throwable e) {
    StringWriter stm = new StringWriter();
    PrintWriter wrt = new PrintWriter(stm);
    e.printStackTrace(wrt);
    wrt.close();
    return stm.toString();
  }
{code}


> Exception information can not be returned when I create transparent 
> encryption zone.
> ------------------------------------------------------------------------------------
>
>                 Key: HDFS-12974
>                 URL: https://issues.apache.org/jira/browse/HDFS-12974
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: encryption
>    Affects Versions: 3.0.0
>            Reporter: fang zhenyi
>            Assignee: fang zhenyi
>            Priority: Minor
>             Fix For: 3.1.0
>
>         Attachments: HDFS-12974.001.patch
>
>
> When I add the following configuration to the kms-acl.xml file, I create 
> encrypted space and I can not get any exception information.
> <property>
>   <name>key.acl.key2.GENERATE_EEK</name>
>   <value>mr</value>
> </property>
> root@fangzhenyi01:~# hdfs crypto -createZone -keyName key2 -path /zone
> 2018-01-02 10:41:44,632 WARN util.NativeCodeLoader: Unable to load 
> native-hadoop library for your platform... using builtin-java classes where 
> applicable
> RemoteException: 
> root@fangzhenyi01:~# 



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