I see you are using tomcat 7.0.28 - probably your are still on wheezy?
There are some bug reports for that message; it seems upgrading tomcat helps, e.g.:
http://stackoverflow.com/q/23541532
http://stackoverflow.com/q/23484098
However the tomcat with wheezy is just too old:
https://packages.debian.org/wheezy/tomcat7
The tomcat with jessie should work
https://packages.debian.org/stable/tomcat7
Maybe try "wheezy-backports" if you do not want to update to jessie
(I have never done that myself, so I cannot be of much help here)
Alternatively it might help editing xwiki's web.xml manually by adding a
metadata-complete="true"
as suggested here:
http://stackoverflow.com/a/12730059
though I have not tried this and do not really understand why it should help
HTH
Clemens
----- Ursprüngliche Nachricht -----
Von: Stéphane Lassire
Am: Wednesday, 25.05.2016, 12:48
An: Xwiki Users
Betreff: Re: [xwiki-users] Error upgrading Debian
Hello Thomas,
The answer :
root@CESAP-WIKI01:/var/log/tomcat7# ps aux | grep tomcat
tomcat7 6355 7.3 6.7 2182572 275136 ? Sl 12:34 0:59
/usr/lib/jvm/java-8-oracle/bin/java
-Djava.util.logging.config.file=/var/lib/tomcat7/conf/logging.properties
-Djava.awt.headless=true -Xmx512m -XX:+UseConcMarkSweepGC
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
-Djava.endorsed.dirs=/usr/share/tomcat7/endorsed -classpath
/usr/share/tomcat7/bin/bootstrap.jar:/usr/share/tomcat7/bin/tomcat-juli.jar
-Dcatalina.base=/var/lib/tomcat7 -Dcatalina.home=/usr/share/tomcat7
-Djava.io.tmpdir=/tmp/tomcat7-tomcat7-tmp
org.apache.catalina.startup.Bootstrap start
thanks for the help
Cordialement
Stéphane Lassire
-----Message d'origine-----
De : users [mailto:users-bounces@xwiki.org] De la part de Thomas Mortagne
Envoyé : mercredi 25 mai 2016 12:46
À : XWiki Users
Objet : Re: [xwiki-users] Error upgrading Debian
"Invalid byte tag in constant pool: 15" still looks like a Java version
issue.
Could you check what version of Java started with "ps aux | grep tomcat" ?
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