[pbs-devel] [PATCH backup] fix #2909: handle missing chunks gracefully in garbage collection

[Oguz Bektas]

On Wed, Aug 05, 2020 at 12:11:37PM +0200, Fabian Grünbichler wrote:
> On August 5, 2020 6:50 am, Dietmar Maurer wrote:
> > But now the task finish with status Ok?
> > 
> > IMHO, this is a serious problem...
> >
> 
> for verify this should cause the task to fail, but for GC I am not so 
> sure. the garbage collection itself is fine (by definition, any missing 
> chunk the GC encounters is one that should not be garbage collected), it 
> just found an unrelated problem?

i was thinking the same.

but i'm sending a new version soon

using worker.warn instead of worker.log should make it continue with a
warning status.

> 
> >> On 08/04/2020 4:01 PM Oguz Bektas <o.bektas at proxmox.com> wrote:
> >> 
> >>  
> >> instead of bailing and stopping the entire GC process, log the missing
> >> chunk errors and continue.
> >> 
> >> Signed-off-by: Oguz Bektas <o.bektas at proxmox.com>
> >> ---
> >>  src/backup/datastore.rs | 4 ++--
> >>  1 file changed, 2 insertions(+), 2 deletions(-)
> >> 
> >> diff --git a/src/backup/datastore.rs b/src/backup/datastore.rs
> >> index ffd64b81..063fba53 100644
> >> --- a/src/backup/datastore.rs
> >> +++ b/src/backup/datastore.rs
> >> @@ -436,8 +436,8 @@ impl DataStore {
> >>              tools::fail_on_shutdown()?;
> >>              let digest = index.index_digest(pos).unwrap();
> >>              if let Err(err) = self.chunk_store.touch_chunk(digest) {
> >> -                bail!("unable to access chunk {}, required by {:?} - {}",
> >> -                      proxmox::tools::digest_to_hex(digest), file_name, err);
> >> +                worker.log(&format!("warning: unable to access chunk {}, required by {:?} - {}",
> >> +                      proxmox::tools::digest_to_hex(digest), file_name, err));
> >>              }
> >>          }
> >>          Ok(())
> >> -- 
> >> 2.20.1
> >> 
> >> 
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> > 
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