error " * Failed to stop couchbase-server" when try to upgrade/reinstall 3.0.0

3.0.0-629

I already had CB on the host when I'm trying to reinstall CB and always get the error:

Stopping previous couchbase ... (3.0.0)

• Failed to stop couchbase-server

sudo /etc/init.d/couchbase-server status

• couchbase-server is running
  andrey@baranouski:/tmp$ sudo dpkg -i couchbase-server-enterprise_x86_64_3.0.0-629-rel.deb
  (Reading database ... 872867 files and directories currently installed.)
  Preparing to replace couchbase-server 3.0.0 (using couchbase-server-enterprise_x86_64_3.0.0-629-rel.deb) ...
• Stopped couchbase-server
  libssl0.9.8 is installed. Continue installing
  Warning: Transparent hugepages may be enabled. To disable the usage
  of transparent hugepages, set the kernel settings at runtime with
  echo never > /sys/kernel/mm/transparent_hugepage/enabled
  Warning: Swappiness is not 0.
  You can set the swappiness at runtime with
  sysctl vm.swappiness=0
  Minimum RAM required : 4 GB
  System RAM configured : 15.56 GB

Minimum number of processors required : 4 cores
Number of processors on the system : 4 cores
Upgrading previous couchbase ... (3.0.0)
Stopping previous couchbase ... (3.0.0)

• Failed to stop couchbase-server
  Saving previous couchbase config.dat ...
  Cleaning symlinks ...
  Unpacking replacement couchbase-server ...
  Setting up couchbase-server (3.0.0) ...
  Upgrading couchbase-server ...
  /opt/couchbase/bin/install/cbupgrade -c /opt/couchbase/var/lib/couchbase/config -a yes
  Automatic mode: running without interactive questions or confirmations.
  Analysing...
  Previous config.dat file is /opt/couchbase/var/lib/couchbase/config/config.dat.debsave
  Target node: ns_1@127.0.0.1
  Upgrading from 2.0

Couchbase should not be running.
Please use: /etc/init.d/couchbase-server stop

Database dir: /opt/couchbase/var/lib/couchbase/data

Buckets to upgrade: default

Checking disk space available for buckets in directory:
/opt/couchbase/var/lib/couchbase/data
Free disk bucket space wanted: 0.0
Free disk bucket space available: 328790032384
Free disk space factor: 2.0
Ok.

Analysis complete.

Copying /opt/couchbase/var/lib/couchbase/config/config.dat.debsave
cp /opt/couchbase/var/lib/couchbase/config/config.dat.debsave /opt/couchbase/bin/install/../../var/lib/couchbase/config/config.dat
Ensuring bucket data directories.
Ensuring bucket data directory: /opt/couchbase/var/lib/couchbase/data/default
mkdir -p /opt/couchbase/var/lib/couchbase/data/default
Ensuring dbdir owner/group: /opt/couchbase/var/lib/couchbase/data
chown -R couchbase:couchbase /opt/couchbase/var/lib/couchbase/data
Ensuring dbdir owner/group: /opt/couchbase/var/lib/couchbase/data
chown -R couchbase:couchbase /opt/couchbase/var/lib/couchbase/data
Upgrading buckets.
Skipping already converted bucket: /opt/couchbase/var/lib/couchbase/data/default

Done.

• Started couchbase-server

You have successfully installed Couchbase Server.
Please browse to http://baranouski:8091/ to configure your server.
Please refer to http://couchbase.com for additional resources.

Please note that you have to update your firewall configuration to
allow connections to the following ports: 11211, 11210, 11209, 4369,
8091, 8092 and from 21100 to 21299.

By using this software you agree to the End User License Agreement.
See /opt/couchbase/LICENSE.txt.

Processing triggers for ureadahead ...

Please note, that I'm able to stop CB manually but sometimes it takes more than 1 min

Fri May 2 15:48:49 FET 2014
andrey@baranouski:/tmp$ sudo /etc/init.d/couchbase-server stop

• Stopped couchbase-server
  andrey@baranouski:/tmp$ date
  Fri May 2 15:50:07 FET 2014