Upgrades with large datasets fail on Ubuntu

Hi all,

The upgrade script for PXC fails on an Ubuntu (and possibly also debian) box because the init.d startup script does not wait long enough for PXC to start.

Setting up percona-xtradb-cluster-server-5.5 (5.5.29-23.7.2-389.lucid) ...
 * Stopping MySQL (Percona XtraDB Cluster) mysqld                                                                                                                                                                         [ OK ]
 * Starting MySQL (Percona XtraDB Cluster) database server mysqld                                                                                                                                                         [fail]
invoke-rc.d: initscript mysql, action "start" failed.
dpkg: error processing percona-xtradb-cluster-server-5.5 (--configure):
 subprocess installed post-installation script returned error exit status 1
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Errors were encountered while processing:
 percona-xtradb-cluster-server-5.5
E: Sub-process /usr/bin/dpkg returned an error code (1)

Any further invocations of apt-get upgrade result in the following:

pt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
  linux-generic linux-headers-generic linux-image-generic linux-image-virtual
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
1 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]?