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[Launchpad Bug Tracker <1666570@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package tomcat7 - 7.0.52-1ubuntu0.11

---------------
tomcat7 (7.0.52-1ubuntu0.11) trusty; urgency=medium

  * Fix an upgrade error when JAVA_OPTS in /etc/default/tomcat7 contains
    the '%' character (LP: #1666570).
  * Fix javax.servlet.jsp POM to use servlet-api version 3.0 instead of
    2.2 (LP: #1664179).

 -- Joshua Powers <josh.powers@xxxxxxxxxxxxx>  Wed, 22 Mar 2017 13:42:56
-0600

** Changed in: tomcat7 (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1666570

Title:
  Post install script has error in RegEx

Status in tomcat7 package in Ubuntu:
  Invalid
Status in tomcat8 package in Ubuntu:
  Fix Released
Status in tomcat7 source package in Trusty:
  Fix Released
Status in tomcat7 source package in Xenial:
  Fix Committed
Status in tomcat8 source package in Xenial:
  Fix Committed
Status in tomcat7 source package in Yakkety:
  Fix Committed
Status in tomcat8 source package in Yakkety:
  Fix Committed
Status in tomcat7 source package in Zesty:
  Invalid
Status in tomcat8 source package in Zesty:
  Fix Released
Status in tomcat7 package in Debian:
  New

Bug description:
  == Begin SRU Template ==
  [Impact]

   * On upgrade of tomcat7 package, if a user has updated their JAVA_OPTS variable to include a '%' an upgrade will fail. The sed command in the postinst uses the '%' character to act as a delimiter, previous versions used '/' however it was updated to '%' in hopes it was far less common.
   * This SRU updates it to a character that should not be found in the JAVA_ARGS value, namely '\001'.
   * This is the same solution Debian and tomcat maintainers are now using for Tomcat8.

  [Test Case]

  An example to test Tomcat7 on Trusty. The same instructions can apply
  to Tomcat8 on the other releases.

  Overview: Install the version from the current release. Modify
  JAVA_OPTS and then install the version from proposed to validate it
  upgrades successfully.

   * lxc launch ubuntu-daily:trusty trusty
   * lxc exec trusty bash
   * apt install tomcat7
   * Edit /etc/default/tomcat7, set JAVA_OPTS="-Djava.awt.headless=true -XX:ErrorFile=/var/log/tomcat7/java_error%p.log -XX:+DisableExplicitGC -XX:+UseG1GC"
   * # Enable proposed
   * apt update
   * apt install tomcat7
   * When asked, 'Keep the local version currently installed'
   * With the fix, install will complete
   * Without the fix, the error as described under "Other Info" will appear

  [Regression Potential]

   * Users currently experiencing this issue would be expecting a SRU fix to come from us. Working around it would require changing their JAVA_OPTS temporarily, accepting the maintainers version of the defaults script, or modifying the package's postinst script directly.
  * In either case the proposed fix will over write any changes an end user may have made to the postinst, and all for correctly working expected behavior.
   * There is the slight, albeit incredibly low chance, that someone actually has the '\001' character in their JAVA_OPTS. In which, case the upgrade would fail as this bug describes.

  [Other Info]

   * Using a new delimiter that is far less likely to be in someone's path. This is not the first time the delimiter has changed, as it originally as '/' which is obviously going to show up as soon as someone adds a path.
   * Upstream change to tomcat8: https://anonscm.debian.org/cgit/pkg-java/tomcat8.git/patch/?id=7664221d66701e2c31a31fe3b4f22e8bea4158dc
   * Error message on failure:

  Setting up tomcat7 (7.0.52-1ubuntu0.10) ...
  sed: -e expression #1, char 97: unknown option to `s'
  dpkg: error processing package tomcat7 (--configure):
   subprocess installed post-installation script returned error exit status 1
  Errors were encountered while processing:
   tomcat7
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  == End SRU Template ==

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