[HDFS-2956] calling fetchdt without a --renewer argument throws NPE

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha, 3.0.0-alpha1
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: security
• Hadoop Flags: Reviewed
• Assignee: Vinayakumar B
• Reporter: Todd Lipcon
• Created: 15/Feb/12 23:02
• Updated: 30/Aug/16 01:42
• Resolved: 10/Jul/15 10:29

Description

If I call "bin/hdfs fetchdt /tmp/mytoken" without a "--renewer foo" argument, then it will throw a NullPointerException:

Exception in thread "main" java.lang.NullPointerException
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getDelegationToken(ClientNamenodeProtocolTranslatorPB.java:830)

this is because getDelegationToken is being called with a null renewer