Duration fails between AGENT_STAGING_OUTPUT_PENDING and unschedule_stop

[mturilli]

Stack:

python               : 3.7.7
  pythonpath           : 
  virtualenv           : /Users/mturilli/.virtualenvs/analytics-devel

  radical.analytics    : 0.90.7-v0.72.0-57-gf903ac4@devel
  radical.entk         : 1.4.1.post1-v1.4.1-9-ga1961e7f@devel
  radical.pilot        : 1.4.0-v1.4.0-48-gafbdfc311@devel
  radical.saga         : 1.4.0
  radical.utils        : 1.4.0

Verified that events are indeed present in unit.events:

1639.3962714672089,   'put',   'agent_executing.0000',   'Thread-3',   'unit.000014',   'AGENT_STAGING_OUTPUT_PENDING',   'agent_staging_output_queue.put.0000',   'unit'
1639.4496746063232,   'unschedule_stop',   'agent_scheduling.0000',   'Thread-1',   'unit.000014',   '',   '',   'unit'

[andre-merzky]

Matteo, would you mind pasting the function call which triggers this? Thanks!