Accessing the HDFS Delegation token from a non-java (streaming) job?

[Erik Forsberg <fo...@opera.com>]

Hi!

 From a java program, I can get access to secure HDFS from a task by use 
of the HDFS delegation tokens. They are available in a file which is 
pointed to by the HADOOP_TOKEN_FILE_LOCATION environment variable, and 
there's a Java API for reading this file and get the token.

However, if I have a streaming job and that job needs to do something to 
HDFS - in my case reading a configuration file, how can I retrieve the 
token? The file is a java-serialized binary one, so it's not as simple 
as just reading the file from say python.

Writing a small java program that reads the file and outputs the token 
as json is one option. Are there any other options?

Regards,
\EF

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