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ASF GitHub Bot commented on BEAM-1316: -------------------------------------- Github user asfgit closed the pull request at: https://github.com/apache/beam/pull/2715 > DoFn#startBundle should not be able to output > --------------------------------------------- > > Key: BEAM-1316 > URL: https://issues.apache.org/jira/browse/BEAM-1316 > Project: Beam > Issue Type: Bug > Components: sdk-java-core, sdk-py > Reporter: Thomas Groh > Assignee: Thomas Groh > Fix For: First stable release > > > While within startBundle and finishBundle, the window in which elements are > output is not generally defined. Elements must always be output from within a > windowed context, or the {{WindowFn}} used by the {{PCollection}} may not > operate appropriately. > startBundle and finishBundle are suitable for operational duties, similarly > to {{setup}} and {{teardown}}, but within the scope of some collection of > input elements. This includes actions such as clearing field state within a > DoFn and ensuring all live RPCs complete successfully before committing > inputs. > Sometimes it might be reasonable to output from {{@FinishBundle}} but it is > hard to imagine a situation where output from {{@StartBundle}} is useful in a > way that doesn't seriously abuse things. -- This message was sent by Atlassian JIRA (v6.3.15#6346)