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https://issues.apache.org/jira/browse/HADOOP-8997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13487809#comment-13487809
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Ingo Rauschenberg commented on HADOOP-8997:
-------------------------------------------
Sorry, the script-code that i have pasted in the description looks like a
autoformat trigger has ruined it :(
> Upgrade of the .deb Packege removes Hadoop Users (hdfs and mapred) and the
> hadoop-group
> ---------------------------------------------------------------------------------------
>
> Key: HADOOP-8997
> URL: https://issues.apache.org/jira/browse/HADOOP-8997
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 1.0.3, 1.0.4
> Environment: Debian Squeeze 64 Bit
> Reporter: Ingo Rauschenberg
>
> During the Package Upgrade the script postrm from the old package is the last
> script that is called.
> Because this script is called after the preinst-script of the new package is
> called the Haddop users and group is deleted.
> This happens because the Script don't check the parameter which is given to
> him.
> A solution may be to modify the script:
> #! /bin/sh
> # Licensed to the Apache Software Foundation (ASF) under one or more
> # contributor license agreements. See the NOTICE file distributed with
> # this work for additional information regarding copyright ownership.
> # The ASF licenses this file to You under the Apache License, Version 2.0
> # (the "License"); you may not use this file except in compliance with
> # the License. You may obtain a copy of the License at
> #
> # http://www.apache.org/licenses/LICENSE-2.0
> #
> # Unless required by applicable law or agreed to in writing, software
> # distributed under the License is distributed on an "AS IS" BASIS,
> # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
> # See the License for the specific language governing permissions and
> # limitations under the License.
> # Abort if any command returns an error value
> set -e
> # This script is called twice during the removal of the package; once
> # after the removal of the package's files from the system, and as
> # the final step in the removal of this package, after the package's
> # conffiles have been removed.
> case "$1" in
> remove)
> # This package has been removed, but its configuration has not yet
> # been purged.
> /usr/sbin/userdel hdfs 2> /dev/null >/dev/null
> /usr/sbin/userdel mapred 2> /dev/null >/dev/null
> /usr/sbin/groupdel hadoop 2> /dev/null >dev/null
> ;;
> purge)
> # This package has previously been removed and is now having
> # its configuration purged from the system.
> /usr/sbin/userdel hdfs 2> /dev/null >/dev/null
> /usr/sbin/userdel mapred 2> /dev/null >/dev/null
> /usr/sbin/groupdel hadoop 2> /dev/null >dev/null
> ;;
> disappear)
> if test "$2" != overwriter; then
> echo "$0: undocumented call to \`postrm $*'" 1>&2
> exit 1
> fi
> # This package has been completely overwritten by package $3
> # (version $4). All our files are already gone from the system.
> # This is a special case: neither "prerm remove" nor "postrm remove"
> # have been called, because dpkg didn't know that this package would
> # disappear until this stage.
> :
> ;;
> upgrade)
> # About to upgrade FROM THIS VERSION to version $2 of this package.
> # "prerm upgrade" has been called for this version, and "preinst
> # upgrade" has been called for the new version. Last chance to
> # clean up.
> :
> ;;
> failed-upgrade)
> # About to upgrade from version $2 of this package TO THIS VERSION.
> # "prerm upgrade" has been called for the old version, and "preinst
> # upgrade" has been called for this version. This is only used if
> # the previous version's "postrm upgrade" couldn't handle it and
> # returned non-zero. (Fix old postrm bugs here.)
> :
> ;;
> abort-install)
> # Back out of an attempt to install this package. Undo the effects of
> # "preinst install...". There are two sub-cases.
> /usr/sbin/userdel hdfs 2> /dev/null >/dev/null
> /usr/sbin/userdel mapred 2> /dev/null >/dev/null
> /usr/sbin/groupdel hadoop 2> /dev/null >dev/null
> if test "${2+set}" = set; then
> # When the install was attempted, version $2's configuration
> # files were still on the system. Undo the effects of "preinst
> # install $2".
> :
> else
> # We were being installed from scratch. Undo the effects of
> # "preinst install".
> :
> fi ;;
> abort-upgrade)
> # Back out of an attempt to upgrade this package from version $2
> # TO THIS VERSION. Undo the effects of "preinst upgrade $2".
> :
> ;;
> *) echo "$0: didn't understand being called with \`$1'" 1>&2
> exit 1;;
> esac
> exit 0
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