[jira] [Commented] (HADOOP-15234) NPE when initializing KMSWebApp

["fang zhenyi (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-15234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16371023#comment-16371023 ] 

fang zhenyi commented on HADOOP-15234:
--------------------------------------

Thanks [~xiaochen] for report this.I will attach a patch later.

I'm able to reproduce this on trunk when I add the following configuration to kms-site.xml.

 
{code:java}
<configuration>
    <property>
        <name>hadoop.kms.key.provider.uri</name>
        <value>jcek://file@/${user.home}/kms.keystore</value>
    </property>
</configuration>
{code}
I replace 'jceks' with 'jcek'. \{{hadoop.kms.key.provider.uri}}  is not null when  \{{keyProvider}} is initialized.But \{{keyProvider}} is not initialized  when we give  wrong \{{hadoop.kms.key.provider.uri}}.\{{keyProvider}}  is initialized by scheme \{{jceks}} in \{{JavaKeyStoreProvider.java}}.

 
{code:java}
/**
 * The factory to create JksProviders, which is used by the ServiceLoader.
 */
public static class Factory extends KeyProviderFactory {
  @Override
  public KeyProvider createProvider(URI providerName,
                                    Configuration conf) throws IOException {
    if (SCHEME_NAME.equals(providerName.getScheme())) {
      return new JavaKeyStoreProvider(providerName, conf);
    }
    return null;
  }
}
{code}
what do you think?

 

 

 

> NPE when initializing KMSWebApp
> -------------------------------
>
>                 Key: HADOOP-15234
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15234
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: kms
>            Reporter: Xiao Chen
>            Assignee: fang zhenyi
>            Priority: Major
>
> During KMS startup, if the {{keyProvider}} is null, it will NPE inside KeyProviderExtension.
> {noformat}
> java.lang.NullPointerException
> 	at org.apache.hadoop.crypto.key.KeyProviderExtension.<init>(KeyProviderExtension.java:43)
> 	at org.apache.hadoop.crypto.key.CachingKeyProvider.<init>(CachingKeyProvider.java:93)
> 	at org.apache.hadoop.crypto.key.kms.server.KMSWebApp.contextInitialized(KMSWebApp.java:170)
> {noformat}
> We're investigating the exact scenario that could lead to this, but the NPE and log around it can be improved.



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