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https://issues.apache.org/jira/browse/FLUME-1216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13286527#comment-13286527
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Leslin (Hong Xiang Lin) commented on FLUME-1216:
------------------------------------------------
Hi, Mike
I reproduced this defect with MIT Kerberos security. There are two ways to
give useful message about keytab missing.
1. Just log this error and return false in HDFSEventSink#authenticate() like
below. This way is consistent with kerbConfPrincipal.isEmpty() or
kerbKeytab.isEmpty(). And HDFSEventSink will not fail.
LOG.error("The keyTab file: " + kerbKeytab + " is nonexistent or can't
read."
+ " Please specify a keytab to use for Kerberos auth. with read access");
return false;
2. Do keytab file check with this precondition, this will thrown exception and
failed immediately. I prefer to this way as it may help user figure out the
problem quickly if users already setup Hadoop with security.
File kfile = new File(kerbKeytab);
Preconditions.checkArgument(kfile.canRead(), "The keyTab file: %s is
nonexistent or can't read.", kerbKeytab );
What's your opinion? Can I take this JIRA? Thank you!
Regards
Leslin
> Need useful error message when keytab does not exist
> ----------------------------------------------------
>
> Key: FLUME-1216
> URL: https://issues.apache.org/jira/browse/FLUME-1216
> Project: Flume
> Issue Type: Bug
> Components: Sinks+Sources
> Reporter: Mike Percy
>
> If keytab file does not exist, no useful error message is printed by HDFS sink
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