[tor-bugs] #20440 [Metrics/metrics-lib]: endless wait in BlockingIteratorImpl

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#20440: endless wait in BlockingIteratorImpl
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 Reporter:  iwakeh               |          Owner:  karsten
     Type:  defect               |         Status:  new
 Priority:  High                 |      Milestone:
Component:  Metrics/metrics-lib  |        Version:
 Severity:  Normal               |     Resolution:
 Keywords:                       |  Actual Points:
Parent ID:                       |         Points:
 Reviewer:                       |        Sponsor:
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Comment (by iwakeh):

 Please test and review [https://gitweb.torproject.org/user/iwakeh/metrics-
 lib.git/commit/?h=task-20440-endless-
 while&id=b4e557ee5d92c133b49fc7e593bbb50ffa20f1c9 my branch].

 This only prevents the endless-while (hope this can be confirmed), but
 doesn't yet solve the underlying issue.

 I'll add a test later.

 At some point java.util.concurrent classes should be used (already
 suggested in #14071).

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Ticket URL: <https://troodi.torproject.org/projects/tor/ticket/20440#comment:1>
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