Created attachment 4278 [details]
BuildStep - Unpack shared repositories

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BUILDSTEP - Unpack shared repositories
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Traceback (most recent call last):
  File "/home/ab/yocto-worker/nightly-oe-selftest/yocto-autobuilder-helper/scripts/shared-repo-unpack", line 43, in <module>
    repos = json.load(f)
  File "/usr/lib64/python3.4/json/__init__.py", line 268, in load
    parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "/usr/lib64/python3.4/json/__init__.py", line 318, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python3.4/json/decoder.py", line 346, in decode
    raise ValueError(errmsg("Extra data", s, end, len(s)))
ValueError: Extra data: line 7 column 2 - line 25 column 2 (char 164 - 656)


This errors seems to be inherited from the step before this while executing BuildStep - Clobber build dir
1. errors seems to be coming from Json content @ repos = json.load(f)

However the error line seems to be error out on line 7 column 2 (Unpack shared repositories), compare to line 717 column 1 (Clobber build dir)

It appears this error is only found on this distribution (centos7) and seems to be consistent over other jobs executed. 
It also appear in my development machine running on Ubuntu 16.04
Need to further investigate this to narrow down the root cause.