Java Daylight Saving Time

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We made the change to the 2018 daylight saving time entry in the Operating System (Linux or Windows), but the JAVA application shows the wrong time (with daylight saving time).

    
asked by anonymous 23.10.2018 / 18:20

1 answer

3

We found that JAVA has its own Daylight Saving Time (DST) and that it is necessary to update the configuration due to the default change.

JAVA ORACLE or OPENJDK

  • Download latest version of TZDATA
  • Download the TZUpdater Tool

  • Run the command below (specify the full path) 

    export JAVA_HOME=caminho do java
java -jar tzupdater.jar -f -l file:///home/USER/Downloads/tzdata-latest.tar.gz

    • If the error occurs, simply unzip the tzdata file, comment the file line and recompress TZDATA

    . 

    Using file:///home/USER/Downloads/tzdata-latest.tar.gz as source for tzdata bundle.
Failed: java.lang.Exception: Failed while parsing file '/tmp/tz.tmp_6/asia' on line 1655 'Rule  Japan   1948    1951    -   Sep Sat>=8  25:00   0   S'
java.lang.Exception: Failed while parsing file '/tmp/tz.tmp_6/asia' on line 1655 'Rule  Japan   1948    1951    -   Sep Sat>=8  25:00   0   S'
    at tools.tzdb.TzdbZoneRulesCompiler.parseFile(TzdbZoneRulesCompiler.java:377)
    at tools.tzdb.TzdbZoneRulesCompiler.compile(TzdbZoneRulesCompiler.java:191)
    at tools.tzdb.TzdbZoneRulesCompiler.<init>(TzdbZoneRulesCompiler.java:307)
    at com.sun.tools.tzupdater.ExternalModule.compileToJSRBinary(ExternalModule.java:153)
    at com.sun.tools.tzupdater.TimezoneUpdater.run(TimezoneUpdater.java:230)
    at com.sun.tools.tzupdater.TimezoneUpdater.main(TimezoneUpdater.java:634)
Caused by: tools.tzdb.DateTimeException: Invalid value for SecondOfDay value: 90000
    at tools.tzdb.ChronoField.checkValidValue(ChronoField.java:173)
    at tools.tzdb.LocalTime.ofSecondOfDay(LocalTime.java:210)
    at tools.tzdb.TzdbZoneRulesCompiler.parseMonthDayTime(TzdbZoneRulesCompiler.java:475)
    at tools.tzdb.TzdbZoneRulesCompiler.parseRuleLine(TzdbZoneRulesCompiler.java:399)
    at tools.tzdb.TzdbZoneRulesCompiler.parseFile(TzdbZoneRulesCompiler.java:354)
    ... 5 more

  • Standard output 

    java -jar tzupdater.jar -f -l file:///home/USER/Downloads/tzupdater-2.2.0/tzdata/tzdata.tar.gz 

Using file:///home/USER/Downloads/tzupdater-2.2.0/tzdata/tzdata.tar.gz as source for tzdata bundle.

    • IBM JAVA

  • Perform the IBM Time Zone Update Utility

    li>

  • Create directory /tmp/jtzu , copy file to folder and decompress file 

    mkdir /tmp/jtzu
cd /tmp/jtzu
scp jtzu-1.7.18e.zip /tmp/jtzu
unzip jtzu-1.7.18e.zip

  • Change the runjtzuenv.sh file by setting NOGUI to disable the graphical interface 

    NOGUI=true

  • Run the file to perform discovery of the JVMs 

    bash runjtzu.sh

  • The above command generates the SDKList.txt file with all Java installations found.

  • Change the file runjtzuenv.sh 

    NOGUI=true
DISCOVERONLY=false
SILENTPATCH=false

  • Run the file again 

    bash runjtzu.sh
    • 23.10.2018 / 18:36
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