Details
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Bug
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Status: In Progress
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Major
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Resolution: Unresolved
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None
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None
Description
The hadoop dtutil cancel command gives NullPointerException.
java.lang.NullPointerException at org.apache.hadoop.security.authentication.util.KerberosName.getShortName(KerberosName.java:422) at org.apache.hadoop.security.User.<init>(User.java:48) at org.apache.hadoop.security.User.<init>(User.java:43) at org.apache.hadoop.security.UserGroupInformation.createRemoteUser(UserGroupInformation.java:1418) at org.apache.hadoop.security.UserGroupInformation.createRemoteUser(UserGroupInformation.java:1402) at org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier.getUser(AbstractDelegationTokenIdentifier.java:80) at org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier.getUser(DelegationTokenIdentifier.java:81) at org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier.toString(DelegationTokenIdentifier.java:91) at java.base/java.lang.String.valueOf(String.java:2951) at java.base/java.lang.StringBuilder.append(StringBuilder.java:168) at org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier.stringifyToken(DelegationTokenIdentifier.java:123) at org.apache.hadoop.hdfs.DFSClient$Renewer.cancel(DFSClient.java:804) at org.apache.hadoop.security.token.Token.cancel(Token.java:527) at org.apache.hadoop.security.token.DtFileOperations.removeTokenFromFile(DtFileOperations.java:283) at org.apache.hadoop.security.token.DtUtilShell$Remove.execute(DtUtilShell.java:320) at org.apache.hadoop.tools.CommandShell.run(CommandShell.java:72) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:81) at org.apache.hadoop.security.token.DtUtilShell.main(DtUtilShell.java:361)
This is because it is trying to create a User and in User.java we are calling this line.
But due to this direct call it doesn't initialize the auth_to_local rules and causes NPE in here in KerberosName.java
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