[MacPorts] #53595: hadoop fails to install before and after selfupdate to 2.40

[MacPorts]

#53595: hadoop fails to install before and after selfupdate to 2.40
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  Reporter:  TheLastLovemark  |      Owner:
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.4.0
Resolution:                   |   Keywords:
      Port:  hadoop           |
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Comment (by kencu):

 Google is your friend ... this looks promising, but I haven't tried it
 <https://wimdeblauwe.wordpress.com/2014/03/20/switching-easily-between-
 java-jdks-on-mac-os-x/>

 No idea about what problems it might cause, sorry.

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Ticket URL: <https://trac.macports.org/ticket/53595#comment:9>
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