package postgres-xc 1.1-2ubuntu2 failed to uninstall: subprocess installed pre-removal script returned error exit status 1; upon a second try the package is removed successfully

[srinivas]

I tried removing the package postgres-xc after installing it(just 10 minutes before). and i encountered this error! but upon a second try on removing the package(through apt-get), the package was removed successfully without an error.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: postgres-xc 1.1-2ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10
Uname: Linux 3.13.0-40-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.6
AptOrdering: postgres-xc: Remove
Architecture: amd64
Date: Fri Dec 12 21:06:01 2014
DpkgTerminalLog:
 Removing postgres-xc (1.1-2ubuntu2) ...
  * Stopping Postgres-XC datanode 
 [ OK ]
  * Stopping Postgres-XC coordinator  ^[[B    pg_ctl: server does not shut down
 invoke-rc.d: initscript postgres-xc, action "stop" failed.
DuplicateSignature: package:postgres-xc:1.1-2ubuntu2:subprocess installed pre-removal script returned error exit status 1
ErrorMessage: subprocess installed pre-removal script returned error exit status 1
InstallationDate: Installed on 2014-10-30 (43 days ago)
InstallationMedia: Ubuntu-GNOME 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: postgres-xc
Title: package postgres-xc 1.1-2ubuntu2 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.