Steve Loughran created HDFS-13951:
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Summary: HDFS DelegationTokenFetcher can't print non-HDFS tokens
in a tokenfile
Key: HDFS-13951
URL: https://issues.apache.org/jira/browse/HDFS-13951
Project: Hadoop HDFS
Issue Type: Bug
Components: tools
Affects Versions: 3.2.0
Reporter: Steve Loughran
Assignee: Steve Loughran
the fetchdt command can fetch tokens for filesystems other than hdfs (s3a,
abfs, etc), but it can't print them, as it assumes all tokens in the file are
subclasses of
{{org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier}}
& uses this fact in its decoding. It deserializes the token byte array without
checking kind and so ends up with invalid data.
Fix: ask the tokens to decode themselves; only call toStableString() if an HDFS
token.
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