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[mrkramps <1700292@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

This issue affects Ubuntu 16.04.

When having openjdk-8-jre-headless (8u131-b11-0ubuntu1.16.04.2)
installed and installing openjdk-9-jre-headless (9~b114-0ubuntu1) all
links in the Debian Alternatives System are changed pointing to JRE 9:

$ sudo apt-get install openjdk-9-jre-headless
[…]
Setting up openjdk-9-jre-headless:amd64 (9~b114-0ubuntu1) ...
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/rmid to provide /usr/bin/rmid (rmid) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/java to provide /usr/bin/java (java) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/keytool to provide /usr/bin/keytool (keytool) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/jjs to provide /usr/bin/jjs (jjs) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/pack200 to provide /usr/bin/pack200 (pack200) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/rmiregistry to provide /usr/bin/rmiregistry (rmiregistry) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/unpack200 to provide /usr/bin/unpack200 (unpack200) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/orbd to provide /usr/bin/orbd (orbd) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/servertool to provide /usr/bin/servertool (servertool) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/tnameserv to provide /usr/bin/tnameserv (tnameserv) in auto mode
update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/lib/jexec to provide /usr/bin/jexec (jexec) in auto mode
[…]


If removing/purging openjdk-9-jre-headless the links are not changed back to JRE 8:

$ sudo apt-get purge openjdk-9-jre-headless
[…]
Removing openjdk-9-jre-headless:amd64 (9~b114-0ubuntu1) ...
update-alternatives: using /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/jexec to provide /usr/bin/jexec (jexec) in auto mode
Purging configuration files for openjdk-9-jre-headless:amd64 (9~b114-0ubuntu1) ...
dpkg: warning: while removing openjdk-9-jre-headless:amd64, directory '/usr/lib/jvm/java-9-openjdk-amd64/lib/amd64/server' not empty so not removed
[…]


Checking Java version outputs:

$ java -version
The program 'java' can be found in the following packages:
 * default-jre
 * gcj-5-jre-headless
 * openjdk-8-jre-headless
 * gcj-4.8-jre-headless
 * gcj-4.9-jre-headless
 * openjdk-9-jre-headless
Try: sudo apt install <selected package>


Reinstalling openjdk-8-jre-headless does not help:

$ sudo install --reinstall openjdk-8-jre-headless
[…]
Setting up openjdk-8-jre-headless:amd64 (8u131-b11-0ubuntu1.16.04.2) ...
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
[…]


Checking Java version again still outputs:

$ java -version
The program 'java' can be found in the following packages:
 * default-jre
 * gcj-5-jre-headless
 * openjdk-8-jre-headless
 * gcj-4.8-jre-headless
 * gcj-4.9-jre-headless
 * openjdk-9-jre-headless
Try: sudo apt install <selected package>


Checking entry in Alternatives System outputs:

$ update-alternatives --display java
update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
java - auto mode
  link best version is /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
  link currently points to /usr/lib/jvm/java-9-openjdk-amd64/bin/java
  link java is /usr/bin/java
  slave java.1.gz is /usr/share/man/man1/java.1.gz
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java - priority 1081
  slave java.1.gz: /usr/lib/jvm/java-8-openjdk-amd64/jre/man/man1/java.1.gz


Current workaround is to manually change the links back to JRE 8:

$ for a in rmid java keytool jjs pack200 rmiregistry unpack200 orbd
servertool tnameserv jexec ; do ; sudo update-alternatives --auto "$a" ;
done


Or purge and reinstall the complete JRE 8 which will also affect all packages depending on it.

** Affects: openjdk-9 (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of OpenJDK,
which is subscribed to openjdk-9 in Ubuntu.
https://bugs.launchpad.net/bugs/1700292

Title:
  Removing package openjdk-9-jre-headless does not delete/change links
  in Debian Alternatives System

Status in openjdk-9 package in Ubuntu:
  New

Bug description:
  This issue affects Ubuntu 16.04.

  When having openjdk-8-jre-headless (8u131-b11-0ubuntu1.16.04.2)
  installed and installing openjdk-9-jre-headless (9~b114-0ubuntu1) all
  links in the Debian Alternatives System are changed pointing to JRE 9:

  $ sudo apt-get install openjdk-9-jre-headless
  […]
  Setting up openjdk-9-jre-headless:amd64 (9~b114-0ubuntu1) ...
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/rmid to provide /usr/bin/rmid (rmid) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/java to provide /usr/bin/java (java) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/keytool to provide /usr/bin/keytool (keytool) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/jjs to provide /usr/bin/jjs (jjs) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/pack200 to provide /usr/bin/pack200 (pack200) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/rmiregistry to provide /usr/bin/rmiregistry (rmiregistry) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/unpack200 to provide /usr/bin/unpack200 (unpack200) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/orbd to provide /usr/bin/orbd (orbd) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/servertool to provide /usr/bin/servertool (servertool) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/bin/tnameserv to provide /usr/bin/tnameserv (tnameserv) in auto mode
  update-alternatives: using /usr/lib/jvm/java-9-openjdk-amd64/lib/jexec to provide /usr/bin/jexec (jexec) in auto mode
  […]

  
  If removing/purging openjdk-9-jre-headless the links are not changed back to JRE 8:

  $ sudo apt-get purge openjdk-9-jre-headless
  […]
  Removing openjdk-9-jre-headless:amd64 (9~b114-0ubuntu1) ...
  update-alternatives: using /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/jexec to provide /usr/bin/jexec (jexec) in auto mode
  Purging configuration files for openjdk-9-jre-headless:amd64 (9~b114-0ubuntu1) ...
  dpkg: warning: while removing openjdk-9-jre-headless:amd64, directory '/usr/lib/jvm/java-9-openjdk-amd64/lib/amd64/server' not empty so not removed
  […]

  
  Checking Java version outputs:

  $ java -version
  The program 'java' can be found in the following packages:
   * default-jre
   * gcj-5-jre-headless
   * openjdk-8-jre-headless
   * gcj-4.8-jre-headless
   * gcj-4.9-jre-headless
   * openjdk-9-jre-headless
  Try: sudo apt install <selected package>

  
  Reinstalling openjdk-8-jre-headless does not help:

  $ sudo install --reinstall openjdk-8-jre-headless
  […]
  Setting up openjdk-8-jre-headless:amd64 (8u131-b11-0ubuntu1.16.04.2) ...
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  […]

  
  Checking Java version again still outputs:

  $ java -version
  The program 'java' can be found in the following packages:
   * default-jre
   * gcj-5-jre-headless
   * openjdk-8-jre-headless
   * gcj-4.8-jre-headless
   * gcj-4.9-jre-headless
   * openjdk-9-jre-headless
  Try: sudo apt install <selected package>

  
  Checking entry in Alternatives System outputs:

  $ update-alternatives --display java
  update-alternatives: warning: alternative /usr/lib/jvm/java-9-openjdk-amd64/bin/java (part of link group java) doesn't exist; removing from list of alternatives
  java - auto mode
    link best version is /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
    link currently points to /usr/lib/jvm/java-9-openjdk-amd64/bin/java
    link java is /usr/bin/java
    slave java.1.gz is /usr/share/man/man1/java.1.gz
  /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java - priority 1081
    slave java.1.gz: /usr/lib/jvm/java-8-openjdk-amd64/jre/man/man1/java.1.gz

  
  Current workaround is to manually change the links back to JRE 8:

  $ for a in rmid java keytool jjs pack200 rmiregistry unpack200 orbd
  servertool tnameserv jexec ; do ; sudo update-alternatives --auto "$a"
  ; done

  
  Or purge and reinstall the complete JRE 8 which will also affect all packages depending on it.

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