Upgrading JDK

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Article Information

This article applies to the following ZCS versions.

ZCS 8.0 Article ZCS 8.0

ZCS 7.0 Article ZCS 7.0
ZCS 6.0 Article ZCS 6.0
ZCS 5.0 Article ZCS 5.0

Upgrading JDK

Manually upgrading Java JDK with ZCS

For security and performance reasons, it would be a good idea for customers running older versions of ZCS to manually upgrade their Java JDK version. The following steps provide the instructions on doing this - it is a low-risk activity with an easy method to rollback to the current JDK release - both versions remain on the server.

0. Download the correct version of the JDK for your version of Zimbra ZCS:

  • ZCS8 - Java SE Development Kit (JDK) 7
  • ZCS7 - Java SE Development Kit (JDK) 1.6
  • ZCS6 - Java SE Development Kit (JDK) 1.6
  • ZCS5 - Java SE Development Kit (JDK) 1.6

Manual Install Instructions (using JDK 1.6 as an example, for ZCS7)

1. Download jdk1.6 (latest)

Java SE Development Kit: [1]

2. Download appropriate version

Use .bin version (not rpm.bin), x64 or x86 as appropriate for your OS install.

3. Move download to mailstore(s) into /var/tmp, open binary

  1. chmod 755 /var/tmp/jdk-6u45-linux-x64.bin
  2. ./jdk-6u45-linux-x64.bin

Unpacking... Checksumming... Extracting... UnZipSFX 5.50 of 17 February 2002, by Info-ZIP (Zip-Bugs@lists.wku.edu).

  creating: jdk1.6.0_45/
  creating: jdk1.6.0_45/db/
  creating: jdk1.6.0_45/db/bin/
 inflating: jdk1.6.0_45/db/bin/ij  

<snip> Creating jdk1.6.0_45/jre/lib/javaws.jar Creating jdk1.6.0_45/jre/lib/deploy.jar Done.

4. Move to /opt/zimbra

(as root)

  1. mv -i jdk1.6.0_45 /opt/zimbra/

5. Copy cacerts file from existing Java setup

  1. p /opt/zimbra/java/jre/lib/security/cacerts /opt/zimbra/jdk1.6.0_45/jre/lib/security #replace the existing file
  2. chown zimbra:zimbra /opt/zimbra/jdk1.6.0_45/jre/lib/security/cacerts

6. Remove and replace the symlink

  1. cd /opt/zimbra
  2. rm java
  3. ln -s /opt/zimbra/jdk1.6.0_45 java

7. Restart the java processes

  1. su - zimbra

$ zmmailboxdctl restart $ zmconfigdctl restart

8. Rollback Plan

Leave the old java version intact just in case. Rolling back is just a matter of altering the symlink for /opt/zimbra/java, and restarting the processes again.


Verified Against: ZCS 8.0 ZCS 7.0 ZCS 6.0 ZCS 5.0 Date Created: 12/17/2013
Article ID: https://wiki.zimbra.com/index.php?title=Upgrading_JDK Date Modified: 2013-12-17



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