Error messages while performing Couchbase upgrade

1d [abhishek@galleon:/opt/couchbase/bin] $ sudo /etc/init.d/couchbase-server stop

 * Stopped couchbase-server

1d [abhishek@galleon:/opt/couchbase/bin] 28s $

1d [abhishek@galleon:/home/abhishek] 3s 1 $ sudo dpkg -i couchbase-server-enterprise_4.0.0-2046-ubuntu14.04_amd64.deb 

[sudo] password for abhishek: 

(Reading database ... 107424 files and directories currently installed.)

Preparing to unpack couchbase-server-enterprise_4.0.0-2046-ubuntu14.04_amd64.deb ...

 * Failed to stop couchbase-server

libssl1.0.0 is installed. Continue installing

Warning: Swappiness is not set to 0.

Please look at http://bit.ly/1hTySfg as for how to PERMANENTLY alter this setting.

Minimum RAM required  : 4 GB

System RAM configured : 157.39 GB

Minimum number of processors required : 4 cores

Number of processors on the system    : 24 cores

Upgrading previous couchbase ... (4.0.0-1927-1)

Stopping previous couchbase ... (4.0.0-1927-1)

 * Failed to stop couchbase-server

Saving previous couchbase config.dat ...

Cleaning symlinks ...

Unpacking couchbase-server (4.0.0-2046-1) over (4.0.0-1927-1) ...

Setting up couchbase-server (4.0.0-2046-1) ...

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: /raid1/couchbase

Buckets to upgrade: webnutshell,supportal,phonehome

Checking disk space available for buckets in directory:

  /raid1/couchbase

  Free disk bucket space wanted: 0.0

  Free disk bucket space available: 825846603776

  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

Copying /opt/couchbase/bin/install/../../etc/couchdb/local.ini.debsave

    cp /opt/couchbase/bin/install/../../etc/couchdb/local.ini.debsave /opt/couchbase/bin/install/../../etc/couchdb/local.ini

Ensuring bucket data directories.

Ensuring bucket data directory: /raid1/couchbase/webnutshell

    mkdir -p /raid1/couchbase/webnutshell

Ensuring bucket data directory: /raid1/couchbase/supportal

    mkdir -p /raid1/couchbase/supportal

Ensuring bucket data directory: /raid1/couchbase/phonehome

    mkdir -p /raid1/couchbase/phonehome

Ensuring dbdir owner/group: /raid1/couchbase

    chown -R couchbase:couchbase /raid1/couchbase

Ensuring dbdir owner/group: /opt/couchbase/var/lib/couchbase/data

    chown -R couchbase:couchbase /opt/couchbase/var/lib/couchbase/data

Upgrading buckets.

Traceback (most recent call last):

  File "/opt/couchbase/bin/install/cbupgrade", line 572, in <module>

    main()

  File "/opt/couchbase/bin/install/cbupgrade", line 567, in main

    dbdir, buckets, dry_run=dry_run)

  File "/opt/couchbase/bin/install/cbupgrade", line 206, in upgrade

    convert_sqlite_wal(bucket_dir_old, bucket)

  File "/opt/couchbase/bin/install/cbupgrade", line 267, in convert_sqlite_wal

    run_sql(sqlite, bucket_file, "PRAGMA wal_checkpoint(FULL)")

  File "/opt/couchbase/bin/install/cbupgrade", line 276, in run_sql

    stderr=subprocess.PIPE)

  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__

    errread, errwrite)

  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child

    raise child_exception

OSError: [Errno 13] Permission denied

dpkg: error processing package couchbase-server (--install):

 subprocess installed post-installation script returned error exit status 1

Processing triggers for ureadahead (0.100.0-16) ...

Errors were encountered while processing:

 couchbase-server