[DM-17739] Recent update to TaskLoader breaks pickle - Jira

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Michelle Gower reported issues with pickling QuantumGraph which produces diagnostics like this:

Failed to build graph: Can't pickle <class 'lsst.ip.isr.isrTask.IsrTaskConfig'>: it's not the same object as lsst.ip.isr.isrTask.IsrTaskConfig

Traceback (most recent call last):

  File "/home/mgower/gen3work/full_hsc/git/ctrl_mpexec/bin/pipetask", line 26, in <module>

    sys.exit(CmdLineFwk().parseAndRun())

  File "/home/mgower/gen3work/full_hsc/git/ctrl_mpexec/python/lsst/ctrl/mpexec/cmdLineFwk.py", line 127, in parseAndRun

    qgraph = self.makeGraph(pipeline, taskFactory, args)

  File "/home/mgower/gen3work/full_hsc/git/ctrl_mpexec/python/lsst/ctrl/mpexec/cmdLineFwk.py", line 359, in makeGraph

    pickle.dump(qgraph, pickleFile)

_pickle.PicklingError: Can't pickle <class 'lsst.ip.isr.isrTask.IsrTaskConfig'>: it's not the same object as lsst.ip.isr.isrTask.IsrTaskConfig

This seems to be related to last change in module import in TaskLoader.

blocks

DM-18044 Run ci_hsc using Pegasus

is triggered by

DM-17148 pipeline task activator squashes import errors