Import crash on big svn repo with "core git rejected index" error

[wudong]

I'm trying to migrate a huge svn repo (76G in size). It crashes in the middle after about 24 hours.

fast-import crash report:
    fast-import process: 15424
    parent process     : 23192
    at Tue Mar 20 09:41:13 2018

fatal: core git rejected index objects/pack/pack-2aa286062dcf4aa1d6bed58a2693a6cd00dba5a6.idx

Most Recent Commands Before Crash:

....

Active Branch LRU
-----------------
    active_branches = 1 cur, 5 max

  pos  clock name
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1)   9999 refs/heads/master

Inactive Branches
-----------------
refs/heads/master:
  status      : active loaded
  tip commit  : de565fa294b19e927915f4343d192ed36aed7c2d
  old tree    : 0572758db74396179eb9473ab8e0fa881cf4cc33
  cur tree    : 0572758db74396179eb9473ab8e0fa881cf4cc33
  commit clock: 9999
  last pack   : 0

Not quite sure why the repo is that big tbh, cause it has only 19000 revisions. and we have other repo that has way more revisions but only a few G.