Github user dszeto commented on the issue:
https://github.com/apache/incubator-predictionio/issues/253
For the curious, the root cause of this is due to the implementation of
access key generation
(https://github.com/apache/incubator-predictionio/blob/develop/data/src/main/scala/org/apache/predictionio/data/storage/AccessKeys.scala#L68)
and the lack of entropy on virtual machines (whether locally or on the cloud)
explained here:
https://blog.cloudflare.com/ensuring-randomness-with-linuxs-random-number-generator/
tl;dr, if you are just testing out PredictionIO and are running into this
problem, please specify your own access key: `pio app new your_app_name
--access-key your_key` to workaround this problem.
We are looking to a way of adding a command line argument to unblock
progress at the cost of using a less secure random source.
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