[postgis-tickets] [PostGIS] #4129: Cannot update SecondarySnapshot during a parallel operation

[PostGIS]

#4129: Cannot update SecondarySnapshot during a parallel operation
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  Reporter:  davidp  |      Owner:  Bborie Park
      Type:  defect  |     Status:  new
  Priority:  high    |  Milestone:  PostGIS 2.4.6
 Component:  raster  |    Version:  2.4.x
Resolution:          |   Keywords:  SecondarySnapshot parallel
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Comment (by pramsey):

 So, that particular error message arises from
 [https://github.com/postgres/postgres/blob/705d433fd5e29ac173ef46a5acd4a2d7336f5573/src/backend/utils/time/snapmgr.c#L379
 GetLatestSnapshot] which is not called at all in the PostGIS code base and
 pretty infrequently in the PgSQL code base. The only places that I can see
 that might happen during run time is some replication code paths? Are you
 running with replication on? I'm looking particularly at the
 st_transform() code line in PostGIS, and it all seems like it should be
 fine WRT parallelism. Any hints on replicating this?

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4129#comment:6>
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