tree 66b836c5642e8977cd65b70bb7ccac6f8e7527fc
parent 36581c07b5fc46b6ab7811b14af0aa308ad398d3
author Kaushik Lingarkar <klingarkar@nvidia.com> 1789777609 -0700
committer Kaushik Lingarkar <klingarkar@nvidia.com> 1790028146 -0700

ProjectRepairer: Sweep stale snapshots before repairing

Delete snapshots older than a day at the start of each repair. A
snapshot directory is deleted in a finally block once its transfer
finishes, which covers every normal path, including failures and
interrupts. It cannot cover an abnormal JVM exit, such as a kill or an
out of memory kill, between creating the hardlinks and deleting them.
The links that survive keep the objects they point at alive, so gc
cannot reclaim the space until someone removes the directory by hand.

Change-Id: Ia49e874ab39cc1eb86d0ca3fa898f2e7b31fa91d