Symptoms

After executing a git push the following output is displayed:

Counting objects: 84347, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (44724/44724), done.
Writing objects: 100% (84347/84347), 4.83 GiB | 1.68 MiB/s, done.
Total 84347 (delta 36315), reused 84347 (delta 36315)
fatal: Out of memory, malloc failed (tried to allocate 1797195454 bytes)
error: unpack failed: index-pack abnormal exit

Cause

This usually happens when the Bitbucket Server instance doesn't have available memory to fork out Git processes.

Resolution

• To dimension your Bitbucket Server instance correctly in terms of memory, please refer to Scaling Bitbucket Data Center where you can find more details on how Bitbucket Server forks out Git processes and how expensive it is.

• Add memory to your Bitbucket Server instance accordingly.