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root cause analysis

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Joey Hess 2024-06-03 13:56:43 -04:00
parent da2c02162c
commit 61ed0b3f03
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2 changed files with 16 additions and 4 deletions

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doc/bugs/annex_merge__breaks_git_repository__33__/comment_4_c818e240e0d0ed8da3733e574694cc44._comment
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Spotchecked a few other OpenNeuro datasets in the same numeric range and
they seem ok, so this may have been a 1-off problem. It would be good to
check all 1.1k datasets.
One possible way this might happen: git-annex is performing a transition,
and gets interrupted after making the commit starting the new git-annex
branch, but before it can graft in the export trees.
"""]]

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doc/bugs/annex_merge__breaks_git_repository__33__/comment_5_0998f6d67fc6327ecbbb3c23ad7f5275._comment Normal file
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[[!comment format=mdwn
username="joey"
subject="""comment 5"""
date="2024-06-03T17:28:02Z"
content="""
performTransitionsLocked, when `neednewlocalbranch = True`,
first writes the new git-annex branch, and then calls
regraftexports which adds a second commit onto it.
In the window before regraftexports finishes, interrupting git-annex will
leave the repository in this state.
There may be some other way this could happen, but that seems like a likely
cause. It needs to avoid updating the git-annex branch ref until it's
grafted the exports into it.
"""]]