In this article I will briefly explain how to check and update java timezone on Linux and Windows servers with simple examples.
Linux and Unix Oracle JDK:
Check running java process
# ps -ef|grep -v grep|grep java|awk '{print $8}'|sort -rn|uniq
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.71-1.b15.el6_7.x86_64/jre/bin/java
java
Check java version
# java -version openjdk version "1.8.0_71" OpenJDK Runtime Environment (build 1.8.0_71-b15) OpenJDK 64-Bit Server VM (build 25.71-b15, mixed mode) [root@casesup ~]# /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.71-1.b15.el6_7.x86_64/jre/bin/java -version openjdk version "1.8.0_71" OpenJDK Runtime Environment (build 1.8.0_71-b15) OpenJDK 64-Bit Server VM (build 25.71-b15, mixed mode)
Downlod tzupdater and tzdata
Tzupdater tool (TimeZone Updater) is provided to allow you update jre and jdk timezone libraries to accommodate daylight saving time changes in different countries. Oracle company relies on the IANA's timezone database. So there will be two compressed files that you need to download from the link I added.
Extract files and check tzdata version
# ls -ld * -rw-r--r-- 1 root root 392087 Oct 28 10:39 tzdata2019c.tar.gz -rw-r--r-- 1 root root 166595 Oct 28 10:54 tzupdater.jar -rw-r--r-- 1 root root 159058 Oct 28 10:38 tzupdater-2_3_0.zip
# /usr/java/jdk1.8.0_231/bin/java -jar tzupdater.jar -v
Usage: java -jar tzupdater.jar options
options:
-h, --help Print this message and exit.
-V, --version Print tool version, tzdata version in JRE, tzdata version
that tool would update to and then exit.
-l, --location <URL link to tzdata.tar.gz archive file>
Compile, test and update JRE timezone data from provided tzdata.tar.gz bundle
e.g -l https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz
Supported URL protocols : http://, https://, file://
If no URL link is provided, tool will use latest IANA tzdata bundle at:
https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz
-f, --force Force a tzdata update. Use this option if updating to an older tzdata version.
-v, --verbose Display detailed messages to stdout.
# /usr/java/jdk1.8.0_231/bin/java -jar tzupdater.jar -V
tzupdater version 2.3.0-b01
JRE tzdata version: tzdata2019b
Update timezone libraries
Online:
Server needs internet access to get latest tzdata file.
# /usr/java/jdk1.8.0_231/bin/java -jar tzupdater.jar -l --verbose Using https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz as source for tzdata bundle. java.home: /usr/java/jdk1.8.0_231/jre java.vendor: Oracle Corporation java.version: 1.8.0_231 tzupdater version 2.3.0-b01 JRE tzdata version: tzdata2019b
Offline:
Download binary and upload to the server under /tmp.
[root@casesup javatimezone]# /usr/java/jdk1.8.0_231/bin/java -jar tzupdater.jar -l file:///tmp/tzdata2019c.tar.gz --verbose Outputting tzdb file: /usr/java/jdk1.8.0_231/jre/lib/tzdb.dat.dynamic Renaming /usr/java/jdk1.8.0_231/jre/lib/tzdb.dat to /usr/java/jdk1.8.0_231/jre/lib/tzdb.dat.tzdata2019b Renaming /usr/java/jdk1.8.0_231/jre/lib/tzdb.dat.dynamic to /usr/java/jdk1.8.0_231/jre/lib/tzdb.dat Validating for : tzdata2019c Validation complete JRE updated to version : tzdata2019c
Linux Open JDK:
There are two rpm packages are provided by linux distro to update tzdata libraries.
tzdata-2016j-1.el7.noarch <System tzdata libraries> tzdata-java-2016j-1.el7.noarch <OpenJDK java tzdata libraries>
# yum update tzdata Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast redhat7_Software | 4.0 kB 00:00:00 redhat7_Update | 4.0 kB 00:00:00 repo_opt | 4.0 kB 00:00:00 repoextra | 4.0 kB 00:00:00 (1/2): redhat7_Update/updateinfo | 3.4 MB 00:00:00 (2/2): redhat7_Update/primary_db | 100 MB 00:00:02 Resolving Dependencies --> Running transaction check ---> Package tzdata.noarch 0:2016j-1.el7 will be updated ---> Package tzdata.noarch 0:2019c-1.el7 will be an update --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================================================================================================ Package Arch Version Repository Size ============================================================================================================================================================================================================================================ Updating: tzdata noarch 2019c-1.el7 redhat7_Update 493 k Transaction Summary ============================================================================================================================================================================================================================================ Upgrade 1 Package Total download size: 493 k Is this ok [y/d/N]: y Downloading packages: No Presto metadata available for redhat7_Update tzdata-2019c-1.el7.noarch.rpm | 493 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Warning: RPMDB altered outside of yum. Updating : tzdata-2019c-1.el7.noarch 1/2 Cleanup : tzdata-2016j-1.el7.noarch 2/2 Verifying : tzdata-2019c-1.el7.noarch 1/2 Verifying : tzdata-2016j-1.el7.noarch 2/2 Updated: tzdata.noarch 0:2019c-1.el7 Complete! [root@eaglemonitorp01 javatimezone]# rpm -qa|grep tzda tzdata-2019c-1.el7.noarch tzdata-java-2016j-1.el7.noarch [root@casesup javatimezone]# yum update tzdata-java Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. Resolving Dependencies --> Running transaction check ---> Package tzdata-java.noarch 0:2016j-1.el7 will be updated ---> Package tzdata-java.noarch 0:2019c-1.el7 will be an update --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================================================================================================ Package Arch Version Repository Size ============================================================================================================================================================================================================================================ Updating: tzdata-java noarch 2019c-1.el7 redhat7_Update 187 k Transaction Summary ============================================================================================================================================================================================================================================ Upgrade 1 Package Total download size: 187 k Is this ok [y/d/N]: y Downloading packages: No Presto metadata available for redhat7_Update tzdata-java-2019c-1.el7.noarch.rpm | 187 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Updating : tzdata-java-2019c-1.el7.noarch 1/2 Cleanup : tzdata-java-2016j-1.el7.noarch 2/2 Verifying : tzdata-java-2019c-1.el7.noarch 1/2 Verifying : tzdata-java-2016j-1.el7.noarch 2/2 Updated: tzdata-java.noarch 0:2019c-1.el7 Complete! [root@casesup javatimezone]# # java -jar tzupdater.jar -V tzupdater version 2.3.0-b01 JRE tzdata version: tzdata2019 # java -version openjdk version "1.8.0_121" OpenJDK Runtime Environment (build 1.8.0_121-b13) OpenJDK 64-Bit Server VM (build 25.121-b13, mixed mode)
Windows Oracle JDK:
