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https://issues.apache.org/jira/browse/FLINK-3929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15404000#comment-15404000
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ASF GitHub Bot commented on FLINK-3929:
---------------------------------------
Github user mxm commented on a diff in the pull request:
https://github.com/apache/flink/pull/2275#discussion_r73159038
--- Diff: flink-core/src/main/java/org/apache/flink/util/Preconditions.java
---
@@ -293,6 +293,16 @@ private static String format(@Nullable String
template, @Nullable Object... args
return builder.toString();
}
+
+ /**
+ * Returns {@code true} if the given string is null or is the empty
string.
+ * @param string a string reference to check
+ * @return {@code true} if the string is null or is the empty string
+ */
+ public static boolean isNullOrEmpty(@Nullable String string) {
--- End diff --
Yes, even better :)
> Support for Kerberos Authentication with Keytab Credential
> ----------------------------------------------------------
>
> Key: FLINK-3929
> URL: https://issues.apache.org/jira/browse/FLINK-3929
> Project: Flink
> Issue Type: New Feature
> Reporter: Eron Wright
> Assignee: Vijay Srinivasaraghavan
> Labels: kerberos, security
> Original Estimate: 672h
> Remaining Estimate: 672h
>
> _This issue is part of a series of improvements detailed in the [Secure Data
> Access|https://docs.google.com/document/d/1-GQB6uVOyoaXGwtqwqLV8BHDxWiMO2WnVzBoJ8oPaAs/edit?usp=sharing]
> design doc._
> Add support for a keytab credential to be associated with the Flink cluster,
> to facilitate:
> - Kerberos-authenticated data access for connectors
> - Kerberos-authenticated ZooKeeper access
> Support both the standalone and YARN deployment modes.
>
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