Hi
I've recently expired my reflog to prune loose objects. On a live, bare,
repository I ran 'git gc --prune=now'
All clients ended up having problems, they would report:
error: refs/heads/master does not point to a valid object!
Running 'git log' on the bare repo gave : fatal: bad object HEAD
So I did a couple of tries reproducing the issue and with this little
test I got a couple of interesting different/similar outcomes
A: mkdir -p /tmp/test; cd /tmp/test ; git init --bare bare ;
B: cd /tmp/test ; git clone bare 1 ; cd 1; touch test; git add test;
while true; do date >> test ; git commit -m "$(date)" test ; git push ||
break; done
A: cd bare; git gc --prune=now (or run it in a loop)
1)
fatal: bad object 22f0351258fa0bb4cd28984b6473510957fbce69
fatal: bad object 22f0351258fa0bb4cd28984b6473510957fbce69
To /tmp/test/bare
! [remote rejected] master -> master (missing necessary objects)
2)
remote: error: unable to write sha1 filename
objects/05/cdb51bb0ea3e229734a4b1bddd5ec70fbc65ed: No such file or directory
remote: fatal: failed to write object
error: unpack failed: unpack-objects abnormal exit
To /tmp/test/bare
! [remote rejected] master -> master (unpacker error)
3)
error: Ref refs/heads/master is at
e992810e70949e797d33041bf6bc961c9fa4f3e5 but expected
0000000000000000000000000000000000000000
remote: error: Cannot lock ref 'refs/heads/master':
To /tmp/test/bare
! [remote rejected] master -> master (failed to update ref)
4)
remote: error: cannot lock ref 'refs/heads/master': Unable to create
'/tmp/test/bare/refs/heads/master.lock': File exists.
remote:
remote: If no other git process is currently running, this probably means a
remote: git process crashed in this repository earlier. Make sure no
other git
remote: process is running and remove the file manually to continue.
To /tmp/test/bare
! [remote rejected] master -> master (failed to update ref)
error: failed to push some refs to '/tmp/test/bare'
And eventually running 'git gc --prune=now/all' on the bare repository
could end with this message:
$ git gc --prune=all
error: refs/heads/master does not point to a valid object!
fatal: bad object refs/heads/master
error: failed to run repack
$ git log -1
fatal: bad object HEAD
This behaviour has been observed with version 2.4.4, 2.5.[12] and 2.6.1
Thank you
- Jan
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