Independent local content stores only coordinate writers within each
store instance. Concurrent cache exports to the same directory can open
the same ingest files, causing rename failures or incomplete writes.
Acquire a filesystem lock per ingest reference before opening a writer
or aborting an ingest. Release it when the writer closes or commits,
including error paths, and report contention as unavailable so existing
retry logic can wait. Preserve references so interrupted uploads remain
resumable, and retain lock files to avoid races with replacement inodes.
Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>
CrazyMax
68162560a9