Summary

Bamboo build fails with bad pack header in the logs.

Environment

All Bamboo versions.

Diagnosis

The following error appears in the <bamboo-home>/logs/atlassian-bamboo.log:

Warning: Permanently added '[127.0.0.1]:32495' (RSA) to the list of known hosts.
Connection to 127.0.0.1 closed by remote host.
fatal: the remote end hung up unexpectedly
fatal: protocol error: bad pack header

Cause

This issue often indicates memory problems on the server.

Solution

1. Login to the Bamboo server as the Bamboo user used to start the service and run the commands below:

   git config --global pack.windowMemory "100m"
   git config --global pack.packSizeLimit "100m"
   git config --global pack.threads "1" 
   git config --global pack.deltaCacheSize "512m" 

   The memory values above may change according to each server. The values above are just a recommendation, but if the problem persists, feel free to adjust those memory values according to your server settings.

2. Go to Overview > Repository Settings and manually clean the caches for all Git repositories