This has happened to be three times today... it seems that the daemons get locked up somehow and refuse to import new commits.
```
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] [2015-06-26 17:05:34] EXCEPTION: (PhutilProxyException) Error while updating the "rD" repository. {>} (CommandException) Command failed with error #255!
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] COMMAND
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] '/usr/src/phabricator/bin/repository' update -- 'D'
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] STDOUT
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] (empty)
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] STDERR
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] [2015-06-26 17:05:34] EXCEPTION: (Exception) git fetch failed with error #128:
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] stdout:
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] stderr:Warning: Permanently added 'git.freelancer.com,10.10.53.37' (RSA) to the list of known hosts.
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] error: insufficient permission for adding an object to repository database objects
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] fatal: failed to write object
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] fatal: unpack-objects failed
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] at [<phabricator>/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php:337]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] arcanist(head=master, ref.master=29839e8c72c5), phabricator(head=master, ref.master=cee1835bb01c), phlab(head=master, ref.master=0aee3d237436), phutil(head=master, ref.master=992abe4a420c)
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] #0 PhabricatorRepositoryPullEngine::executeGitUpdate() called at [<phabricator>/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php:93]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] #1 PhabricatorRepositoryPullEngine::pullRepository() called at [<phabricator>/src/applications/repository/management/PhabricatorRepositoryManagementUpdateWorkflow.php:80]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] #2 PhabricatorRepositoryManagementUpdateWorkflow::e... (343 more bytes) ... at [<phutil>/src/future/exec/ExecFuture.php:416]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] arcanist(head=master, ref.master=29839e8c72c5), phabricator(head=master, ref.master=cee1835bb01c), phlab(head=master, ref.master=0aee3d237436), phutil(head=master, ref.master=992abe4a420c)
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] #0 <#3> ExecFuture::resolvex() called at [<phabricator>/src/applications/repository/daemon/PhabricatorRepositoryPullLocalDaemon.php:361]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] #1 phlog(PhutilProxyException) called at [<phabricator>/src/applications/repository/daemon/PhabricatorRepositoryPullLocalDaemon.php:368]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] #2 PhabricatorRepositoryPullLocalDaemon::resolveUpdateFuture(PhabricatorRepository, ExecFuture, integer) called at [<phabricator>/src/applications/repository/daemon/PhabricatorRepositoryPullLocalDaemon.php:201]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] #3 PhabricatorRepositoryPullLocalDaemon::run() called at [<phutil>/src/daemon/PhutilDaemon.php:183]
Daemon 16915 STDE [Fri, 26 Jun 2015 17:05:35 +1000] #4 PhutilDaemon::execute() called at [<phutil>/scripts/daemon/exec/exec_daemon.php:125]
Daemon 16915 DONE [Fri, 26 Jun 2015 17:05:35 +1000] Process exited normally.
Daemon 16916 DONE [Fri, 26 Jun 2015 17:05:35 +1000] Process exited normally.
Daemon 16917 DONE [Fri, 26 Jun 2015 17:05:35 +1000] Process exited normally.
Daemon 16926 DONE [Fri, 26 Jun 2015 17:05:35 +1000] (2) Graceful shutdown in response to signal 2 (SIGINT).
Daemon 16926 DONE [Fri, 26 Jun 2015 17:05:36 +1000] Process exited normally.
```
To fix, I just restart the daemons.