[Bug 800597] [NEW] Latest postfix update breaks hash-based aliases.db (potentially other .db files too?)

[d1zzyg]

Public bug reported:

OS: Ubuntu 8.04.4 LTS
Package: 2.5.1-2ubuntu1.4

Errors were reported during the update:
  postfix/postfix-script: fatal: the Postfix mail system is already running     [fail]
  invoke-rc.d: initscript postfix, action "restart" failed.
  dpkg: error processing postfix (--configure):
   subprocess post-installation script returned error exit status 1
  dpkg: dependency problems prevent configuration of postfix-ldap:
   postfix-ldap depends on postfix (= 2.5.1-2ubuntu1.4); however:
    Package postfix is not configured yet.
  dpkg: error processing postfix-ldap (--configure):
   dependency problems - leaving unconfigured
  dpkg: dependency problems prevent configuration of postfix-pcre:
   postfix-pcre depends on postfix (= 2.5.1-2ubuntu1.4); however:
    Package postfix is not configured yet.
  dpkg: error processing postfix-pcre (--configure):
   dependency problems - leaving unconfigured
  Processing triggers for libc6 ...
  ldconfig deferred processing now taking place
  Errors were encountered while processing:
   postfix
   postfix-ldap
   postfix-pcre

Whenever postfix is restarted, the following errors are shown in /var/log/mail.err:
  Jun 22 09:50:04 colossus postfix/local[30997]: fatal: open database /etc/mail/aliases.db: Invalid argument

The *original* version of the aliases.db file gives (file /etc/postfix/aliases.db):
  /etc/postfix/aliases.db: Berkeley DB (Hash, version 8, native byte-order)
... whereas *after* the update it shows version 9.

TEMPORARY FIX: Changing the default_database_type to btree fixes
aliases.db, kills the mail.errors and allows postfix to run normally.

** Affects: postfix (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bdb hash postfix

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https://bugs.launchpad.net/bugs/800597

Title:
  Latest postfix update breaks hash-based aliases.db (potentially other
  .db files too?)

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