Detecting a corrupted file

ROOT
1

I have a corrupted root file with 19498 events.
If I loop over the events, the first 4465 are read fine, but from event 4466 onwards when I do inputTree->GetEntry I get the error:

R__unzip: error -5 in inflate (zlib)
Error in <TBasket::ReadBasketBuffers>: fNbytes = 26379, fKeylen = 86, fObjlen = 31424, noutot = 0, nout=0, nin=26293, nbuf=31424
aborting

if I run file0->IsZombie(), the result is false.
Now, my question is, is there some other method that could help detecting the corruption of the file?

2

Hi,

I think we do not allow to check that upfront but rather allow users to recover as much as it is possible from the files.

Cheers,
D

3

Ok,

I think it would be good to have this possibility to detect a possible issue at an earlier stage. Most of the time the solution could be just to rerun the job.

4

The challenge is that checking the file is currently computationally equivalent to reading the whole file ā€¦