#116 Files missing from some replicas

open
nobody
Repository (41)
7
2006-02-08
2006-02-08
No

Development of the agreement checker (vcheckagreement,
which went into the main line in repltools/24) revealed
a small number of cases in which some replicas of an
immutable directory was missing some of its contents.
This is a serious problem which warrants further
investigation.

All the cases where we observed this problem were in a
partcular directory in different versions of the same
package. Each of them had zero-length base chain.
This means that the directory was deleted and
re-created in subsequent versions, not simply modified.

So far, attempts to reproduce the problem have failed.

Since the replications of these directories happened in
the past, there's a possibility that the cause is a bug
which has already been fixed. If that's the case we
should identify the exact bug in question.

Likely places to look for this problem are:

- The code which replicates an immutable directory by
reading it out of the source repository:
ReplicateImmDir and ReplicateImmDirCallback in
Replication.C

- The client-side implementation of the
VestaSource::list function: VDirSurrogate::list in
VDirSurrogate.C

- The server-side implementation of the
VestaSource::list function for immutable directories:
VDirChangeable::list in VDirChangeable.C

Discussion


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