ChartMacro - could not initialize class org.jfree.chart.JFreeChart

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Hi Vincent,

i’ve checked the asked information:

  1. Not sure how exactly to find this out. But searching for “webapp” on the server give following results:

    locate -b webapp

    /etc/tomcat9/policy.d/04webapps.policy
    /usr/lib/xwiki/WEB-INF/lib/xwiki-platform-velocity-webapp-11.10.2.jar
    /usr/lib/xwiki/WEB-INF/lib/xwiki-platform-velocity-webapp-11.10.2.xed
    /var/lib/tomcat9/webapps

    And

    ls -lah /var/lib/tomcat9/webapps/ROOT

    -rw-r–r-- 1 root root 1.9K Nov 11 17:05 index.html
    drwxr-xr-x 2 root root 4.0K Nov 11 17:05 META-INF

    ls -lah /var/lib/tomcat9/webapps/ROOT/META-INF/

    -rw-r–r-- 1 root root 49 Nov 11 17:05 context.xml

    INFO: I’ve configured “Short URLs” according to this How To:
    https://www.xwiki.org/xwiki/bin/view/Documentation/AdminGuide/ShortURLs/

  2. “tar” archive seems to be broken?

    sudo tar tvf /usr/lib/xwiki/WEB-INF/lib/jfreechart-1.0.19.jar

    tar: This does not look like a tar archive
    tar: Skipping to next header
    tar: Exiting with failure status due to previous errors

    EDIT: You probably meant “jar” and not “tar” :slight_smile:

    → Couldn’t find “jar” command on my system at “/usr/lib/jvm/java-1.8.0-openjdk-amd64/bin/”
    or “/usr/lib/jvm/java-8-openjdk-amd64/bin/”

    java -jar /usr/lib/xwiki/WEB-INF/lib/jfreechart-1.0.19.jar

    gives this message:

    no main manifest attribute, in /usr/lib/xwiki/WEB-INF/lib/jfreechart-1.0.19.jar

    Searched for solutions and looked if “jdk” is installed.
    Only “openjdk-8-jre-headless” was installed, so i additionally installed the “openjdk-8-jdk-headless” package.
    Now i could run “jar” command successfull:

    jar tvf /usr/lib/xwiki/WEB-INF/lib/jfreechart-1.0.19.jar

    jar_tvf_jfreechart-1.0.19.jar.txt (58.6 KB)

  3. Restarted Tomcat and checked logfiles. No entries for “chart” (?)

    /var/log/tomcat9/catalina.2020-01-07.log

    xwiki_logfile_2020-01-07.txt (40.9 KB)

Hope this helps.

Conclusion:
EDIT: removed first conclusion because of the wrong command

Have a nice week!

Best,
Dolo