XWiki's back-end is written in Java (in this area is good to be familiar
with the Servlet API and Hibernate) while the front-end is written in
Velocity (server-side scripting) and JavaScript (jQuery) + HTML/CSS
(Bootstrap). You can check the list of project ideas that have been
proposed this year http://dev.xwiki.org/xwiki/bin/view/GoogleSummerOfCode/
. Each project should list the technical requirements.

Hope this helps,
Marius

On Fri, Aug 5, 2016 at 1:29 PM, AMAN SATYA <satyaama...@gmail.com> wrote:

> Hello everyone , actually I wanted to know , what all are the programming
> languages that would be beneficial for GSoC . I will be taking part in GSoC
> next year and I have pretty good hands in java . So I just wanted your
> advice regarding that as I am new to this group
>
> On Thu, Aug 4, 2016 at 8:11 PM, <users-requ...@xwiki.org> wrote:
>
> > Send users mailing list submissions to
> >         users@xwiki.org
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> >         http://lists.xwiki.org/mailman/listinfo/users
> > or, via email, send a message with subject or body 'help' to
> >         users-requ...@xwiki.org
> >
> > You can reach the person managing the list at
> >         users-ow...@xwiki.org
> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of users digest..."
> >
> >
> > Today's Topics:
> >
> >    1. [myxwiki] XWiki Enterprise 8.2.1 Upgrade (Thomas Mortagne)
> >    2. Re: Xwiki on Debian 8 + Tomcat7 - GRAVE: "IOException
> >       (St?phane LASSIRE)
> >    3. Re: Xwiki on Debian 8 + Tomcat7 - GRAVE: "IOException
> >       (Thomas Mortagne)
> >    4. How to create a link to a page translation? (Hofst?tter Mario)
> >    5. [ANN] Contrib Parent pom 6.4-3 (Thomas Mortagne)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Thu, 4 Aug 2016 12:14:46 +0200
> > From: Thomas Mortagne <thomas.morta...@xwiki.com>
> > To: XWiki Users <users@xwiki.org>, XWiki Developers <d...@xwiki.org>
> > Subject: [xwiki-users] [myxwiki] XWiki Enterprise 8.2.1 Upgrade
> > Message-ID:
> >         <CAPnKnLGTst4CHWB6PMND-o5zOFYWemiybG6Ns7pnjZx_ej68pA@
> > mail.gmail.com>
> > Content-Type: text/plain; charset=UTF-8
> >
> > Hi everyone,
> >
> > myxwiki.org has been upgraded to XE 8.2.1. If you own a wiki hosted
> > there you should have a look at the release notes for this version at:
> > http://www.xwiki.org/xwiki/bin/view/ReleaseNotes/
> >
> > You should automatically get an upgrade wizard for your wiki when you
> > login as admin.
> > For more details see the upgrade guide available at :
> > http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Upgrade#
> > HUpgradingwikidocuments
> >
> > To be notified of the myxwiki.org server upgrade you can follow
> > myxwiki on twitter:
> > http://twitter.com/myxwiki
> >
> > Thanks,
> > -XWiki Community
> >
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Thu, 4 Aug 2016 13:09:46 +0200 (CEST)
> > From: St?phane LASSIRE <slass...@cesap.asso.fr>
> > To: "XWiki Users" <users@xwiki.org>
> > Subject: Re: [xwiki-users] Xwiki on Debian 8 + Tomcat7 - GRAVE:
> >         "IOException
> > Message-ID: <007d01d1ee40$d2d3d270$787b7750$@cesap.asso.fr>
> > Content-Type: text/plain;       charset="utf-8"
> >
> > Hello Thomas,
> >
> > Well, this is strange story.
> >
> > For persistent session I found a tip here : uncomment the rule in
> > context.xml :
> >
> > <Context>
> >
> >     <!-- Default set of monitored resources -->
> >     <WatchedResource>WEB-INF/web.xml</WatchedResource>
> >
> >     <!-- Uncomment this to disable session persistence across Tomcat
> > restarts -->
> >     <Manager pathname="" />
> >     <!--
> >     <Manager pathname="" />
> >     -->
> > **end of context.xml**
> > And it is OK
> >
> > The answer to your question :
> >
> > root@CESAP-WIKI01:/usr/lib/xwiki/WEB-INF/lib# ll
> > xwiki-platform-container-*
> > -rw-r--r-- 1 root root 24971 juil. 29 17:26
> > xwiki-platform-container-api-8.2.1.jar
> > -rw-r--r-- 1 root root 35318 juil. 29 17:26
> > xwiki-platform-container-servlet-8.2.1.jar
> >
> > The jar file is there.
> >
> > Could it be a problem with tomcat 7.0.56 ?
> > Will it be easier for me to migrate to tomcat8 ? and  put away the
> tomcat7
> > unstable
> >
> > Thanks
> >
> > Cordialement
> >
> > St?phane Lassire
> > Charg? de l'informatique et de la communication
> > T?l direct : 01 42 85 81 87
> > Courriel : slass...@cesap.asso.fr
> >
> >
> > -----Message d'origine-----
> > De : users [mailto:users-boun...@xwiki.org] De la part de Thomas
> Mortagne
> > Envoy? : jeudi 4 ao?t 2016 11:51
> > ? : XWiki Users
> > Objet : Re: [xwiki-users] Xwiki on Debian 8 + Tomcat7 - GRAVE:
> "IOException
> >
> > Ok this time it's a very different error which indeed looks more serious.
> > But it still seems related to persistent storage of the session and in
> this
> > case it seems to be trying to load a saved request (which is really not
> the
> > kind of thing that make sense to store). For me your Tomcat is in a
> pretty
> > weird state and try to load stuff that don't make much sense in the
> context
> > of XWiki but I don't know anything about persistent storage. Seems to be
> to
> > have something to clean somewhere and some option to disable (if it's
> still
> > enabled).
> >
> > Tomcat cannot find the class
> > org.xwiki.container.servlet.filters.SavedRequestManager$SavedRequest
> > which is supposed to be located in jar
> > /usr/lib/xwiki/WEB-INF/lib/xwiki-platform-container-
> servlet-<version>.jar.
> >
> > You should probably check if you have this jar file and if tomcat is
> > allowed
> > to read it.
> >
> > On Thu, Aug 4, 2016 at 11:42 AM, St?phane LASSIRE <
> slass...@cesap.asso.fr>
> > wrote:
> > > Hello Thomas,
> > >
> > > THanks for your help.
> > >
> > > That's the strange behaviour.
> > > Catalina log file came with lot of messages from solr (some indexing
> > > problems), but I do have on the browser only a blank page.
> > >
> > > I just changed the Xmx java tuning from 512 to 1024 (I though it was
> > > may be a memory error).
> > > But same behaviour : on launching a percentage on the browser from 12
> > > to 50% and a blank page.
> > >
> > > Last Catalina :
> > > ao?t 04, 2016 11:36:12 AM
> > > org.apache.catalina.startup.ClassLoaderFactory
> > > validateFile
> > > AVERTISSEMENT: Problem with directory
> > > [/usr/share/tomcat7/common/classes],
> > > exists: [false], isDirectory: [false], canRead: [false] ao?t 04, 2016
> > > 11:36:12 AM org.apache.catalina.startup.ClassLoaderFactory
> > > validateFile
> > > AVERTISSEMENT: Problem with directory [/usr/share/tomcat7/common],
> > exists:
> > > [false], isDirectory: [false], canRead: [false] ao?t 04, 2016 11:36:12
> > > AM org.apache.catalina.startup.ClassLoaderFactory
> > > validateFile
> > > AVERTISSEMENT: Problem with directory
> > > [/usr/share/tomcat7/server/classes],
> > > exists: [false], isDirectory: [false], canRead: [false] ao?t 04, 2016
> > > 11:36:12 AM org.apache.catalina.startup.ClassLoaderFactory
> > > validateFile
> > > AVERTISSEMENT: Problem with directory [/usr/share/tomcat7/server],
> > exists:
> > > [false], isDirectory: [false], canRead: [false] ao?t 04, 2016 11:36:12
> > > AM org.apache.catalina.startup.ClassLoaderFactory
> > > validateFile
> > > AVERTISSEMENT: Problem with directory
> > > [/usr/share/tomcat7/shared/classes],
> > > exists: [false], isDirectory: [false], canRead: [false] ao?t 04, 2016
> > > 11:36:12 AM org.apache.catalina.startup.ClassLoaderFactory
> > > validateFile
> > > AVERTISSEMENT: Problem with directory [/usr/share/tomcat7/shared],
> > exists:
> > > [false], isDirectory: [false], canRead: [false] ao?t 04, 2016 11:36:12
> > > AM org.apache.coyote.AbstractProtocol init
> > > INFOS: Initializing ProtocolHandler ["http-bio-8080"] ao?t 04, 2016
> > > 11:36:12 AM org.apache.catalina.startup.Catalina load
> > > INFOS: Initialization processed in 720 ms ao?t 04, 2016 11:36:12 AM
> > > org.apache.catalina.core.StandardService
> > > startInternal
> > > INFOS: D?marrage du service Catalina
> > > ao?t 04, 2016 11:36:12 AM org.apache.catalina.core.StandardEngine
> > > startInternal
> > > INFOS: Starting Servlet Engine: Apache Tomcat/7.0.56 (Debian) ao?t 04,
> > > 2016 11:36:12 AM org.apache.catalina.startup.HostConfig
> > > deployDescriptor
> > > INFOS: D?ploiement du descripteur de configuration
> > > /etc/tomcat7/Catalina/localhost/xwiki.xml
> > > 2016-08-04 11:36:32,385 [localhost-startStop-1] WARN
> > > ltInstalledExtensionRepository - Invalid extension
> > > [org.xwiki.enterprise:xwiki-enterprise-ui-mainwiki-7.1.2] on namespace
> > > [wiki:xwiki] (InvalidExtensionException: No compatible extension is
> > > installed for dependency
> > > [org.xwiki.platform:xwiki-platform-chart-plugin-7.1.2])
> > > 2016-08-04 11:36:32,403 [localhost-startStop-1] WARN
> > > ltInstalledExtensionRepository - Invalid extension
> > > [org.xwiki.contrib.forum:application-forum-ui-1.9.4]
> > > (InvalidExtensionException: No compatible extension is installed for
> > > dependency [org.xwiki.platform:xwiki-platform-ratings-api-6.4.4])
> > > 2016-08-04 11:36:32,404 [localhost-startStop-1] WARN
> > > ltInstalledExtensionRepository - Invalid extension
> > > [org.xwiki.platform:xwiki-platform-search-lucene-ui-6.4.2] on
> > > namespace [wiki:xwiki] (InvalidExtensionException: No compatible
> > > extension is installed for dependency
> > > [org.xwiki.platform:xwiki-platform-search-lucene-api-6.4.2])
> > > 2016-08-04 11:36:35,578 [localhost-startStop-1] INFO
> > > o.x.s.s.i.EmbeddedSolrInstance - Starting embedded Solr server...
> > > 2016-08-04 11:36:35,578 [localhost-startStop-1] INFO
> > > o.x.s.s.i.EmbeddedSolrInstance - Using Solr home directory:
> > > [/var/lib/xwiki/data/solr]
> > > 2016-08-04 11:36:39,896 [localhost-startStop-1] INFO
> > > o.x.s.s.i.EmbeddedSolrInstance - Started embedded Solr server.
> > > ao?t 04, 2016 11:36:40 AM org.apache.catalina.session.StandardManager
> > > doLoad
> > >
> > > GRAVE: "ClassNotFoundException" lors du chargement de sessions
> > > persistantes:
> > > java.lang.ClassNotFoundException:
> > > org.xwiki.container.servlet.filters.SavedRequestManager$SavedRequest
> > > java.lang.ClassNotFoundException:
> > > org.xwiki.container.servlet.filters.SavedRequestManager$SavedRequest
> > >         at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> > >         at java.lang.Thread.run(Thread.java:745)
> > >
> > > ao?t 04, 2016 11:36:40 AM org.apache.catalina.session.StandardManager
> > > startInternal
> > > GRAVE: Exception au chargement des sessions depuis le stockage
> > > persistant (persistent storage)
> > > java.lang.ClassNotFoundException:
> > > org.xwiki.container.servlet.filters.SavedRequestManager$SavedRequest
> > >         at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> > >         at java.lang.Thread.run(Thread.java:745)
> > >
> > > Cordialement
> > >
> > > St?phane Lassire
> > > Courriel : slass...@cesap.asso.fr
> > >
> > >
> > > -----Message d'origine-----
> > > De : users [mailto:users-boun...@xwiki.org] De la part de Thomas
> > > Mortagne Envoy? : jeudi 4 ao?t 2016 11:03 ? : XWiki Users Objet : Re:
> > > [xwiki-users] Xwiki on Debian 8 + Tomcat7 - GRAVE: "IOException
> > >
> > > It's the first time I see this error.
> > >
> > > Not even sure what a persistent session is. Maybe Tomcat is configured
> > > to stored the session on disk to get it back when restarting and
> > > something put a not serializable object
> > > (DefaultStringEntityReferenceResolver
> > > which is indeed not serializable) in it.
> > >
> > > Is XWiki running properly after that ? Even if it's indicated GRAVE it
> > > seems to me you just lost this part of the session but XWiki does not
> > > really expect the session to be serailized anyway so you should
> > > probably disable that if possible.
> > >
> > >
> > > _______________________________________________
> > > users mailing list
> > > users@xwiki.org
> > > http://lists.xwiki.org/mailman/listinfo/users
> >
> >
> >
> > --
> > Thomas Mortagne
> > _______________________________________________
> > users mailing list
> > users@xwiki.org
> > http://lists.xwiki.org/mailman/listinfo/users
> >
> >
> > ------------------------------
> >
> > Message: 3
> > Date: Thu, 4 Aug 2016 14:22:04 +0200
> > From: Thomas Mortagne <thomas.morta...@xwiki.com>
> > To: XWiki Users <users@xwiki.org>
> > Subject: Re: [xwiki-users] Xwiki on Debian 8 + Tomcat7 - GRAVE:
> >         "IOException
> > Message-ID:
> >         <CAPnKnLGN7HUc984H621sZUVwng4-QnfhXr3PVS-NscMnAMa1+Q@mail.
> > gmail.com>
> > Content-Type: text/plain; charset=UTF-8
> >
> > I'm still using Tomcat 7 (7.0.52 on Ubuntu 14.04) and I never had this
> > kind of issue.
> >
> > On Thu, Aug 4, 2016 at 1:09 PM, St?phane LASSIRE <slass...@cesap.asso.fr
> >
> > wrote:
> > > Hello Thomas,
> > >
> > > Well, this is strange story.
> > >
> > > For persistent session I found a tip here : uncomment the rule in
> > > context.xml :
> > >
> > > <Context>
> > >
> > >     <!-- Default set of monitored resources -->
> > >     <WatchedResource>WEB-INF/web.xml</WatchedResource>
> > >
> > >     <!-- Uncomment this to disable session persistence across Tomcat
> > > restarts -->
> > >     <Manager pathname="" />
> > >     <!--
> > >     <Manager pathname="" />
> > >     -->
> > > **end of context.xml**
> > > And it is OK
> > >
> > > The answer to your question :
> > >
> > > root@CESAP-WIKI01:/usr/lib/xwiki/WEB-INF/lib# ll
> > xwiki-platform-container-*
> > > -rw-r--r-- 1 root root 24971 juil. 29 17:26
> > > xwiki-platform-container-api-8.2.1.jar
> > > -rw-r--r-- 1 root root 35318 juil. 29 17:26
> > > xwiki-platform-container-servlet-8.2.1.jar
> > >
> > > The jar file is there.
> > >
> > > Could it be a problem with tomcat 7.0.56 ?
> > > Will it be easier for me to migrate to tomcat8 ? and  put away the
> > tomcat7
> > > unstable
> > >
> > > Thanks
> > >
> > > Cordialement
> > >
> > > St?phane Lassire
> > > Charg? de l'informatique et de la communication
> > > T?l direct : 01 42 85 81 87
> > > Courriel : slass...@cesap.asso.fr
> > >
> > >
> > > -----Message d'origine-----
> > > De : users [mailto:users-boun...@xwiki.org] De la part de Thomas
> > Mortagne
> > > Envoy? : jeudi 4 ao?t 2016 11:51
> > > ? : XWiki Users
> > > Objet : Re: [xwiki-users] Xwiki on Debian 8 + Tomcat7 - GRAVE:
> > "IOException
> > >
> > > Ok this time it's a very different error which indeed looks more
> serious.
> > > But it still seems related to persistent storage of the session and in
> > this
> > > case it seems to be trying to load a saved request (which is really not
> > the
> > > kind of thing that make sense to store). For me your Tomcat is in a
> > pretty
> > > weird state and try to load stuff that don't make much sense in the
> > context
> > > of XWiki but I don't know anything about persistent storage. Seems to
> be
> > to
> > > have something to clean somewhere and some option to disable (if it's
> > still
> > > enabled).
> > >
> > > Tomcat cannot find the class
> > > org.xwiki.container.servlet.filters.SavedRequestManager$SavedRequest
> > > which is supposed to be located in jar
> > > /usr/lib/xwiki/WEB-INF/lib/xwiki-platform-container-
> > servlet-<version>.jar.
> > >
> > > You should probably check if you have this jar file and if tomcat is
> > allowed
> > > to read it.
> > >
> > > On Thu, Aug 4, 2016 at 11:42 AM, St?phane LASSIRE <
> > slass...@cesap.asso.fr>
> > > wrote:
> > >> Hello Thomas,
> > >>
> > >> THanks for your help.
> > >>
> > >> That's the strange behaviour.
> > >> Catalina log file came with lot of messages from solr (some indexing
> > >> problems), but I do have on the browser only a blank page.
> > >>
> > >> I just changed the Xmx java tuning from 512 to 1024 (I though it was
> > >> may be a memory error).
> > >> But same behaviour : on launching a percentage on the browser from 12
> > >> to 50% and a blank page.
> > >>
> > >> Last Catalina :
> > >> ao?t 04, 2016 11:36:12 AM
> > >> org.apache.catalina.startup.ClassLoaderFactory
> > >> validateFile
> > >> AVERTISSEMENT: Problem with directory
> > >> [/usr/share/tomcat7/common/classes],
> > >> exists: [false], isDirectory: [false], canRead: [false] ao?t 04, 2016
> > >> 11:36:12 AM org.apache.catalina.startup.ClassLoaderFactory
> > >> validateFile
> > >> AVERTISSEMENT: Problem with directory [/usr/share/tomcat7/common],
> > exists:
> > >> [false], isDirectory: [false], canRead: [false] ao?t 04, 2016 11:36:12
> > >> AM org.apache.catalina.startup.ClassLoaderFactory
> > >> validateFile
> > >> AVERTISSEMENT: Problem with directory
> > >> [/usr/share/tomcat7/server/classes],
> > >> exists: [false], isDirectory: [false], canRead: [false] ao?t 04, 2016
> > >> 11:36:12 AM org.apache.catalina.startup.ClassLoaderFactory
> > >> validateFile
> > >> AVERTISSEMENT: Problem with directory [/usr/share/tomcat7/server],
> > exists:
> > >> [false], isDirectory: [false], canRead: [false] ao?t 04, 2016 11:36:12
> > >> AM org.apache.catalina.startup.ClassLoaderFactory
> > >> validateFile
> > >> AVERTISSEMENT: Problem with directory
> > >> [/usr/share/tomcat7/shared/classes],
> > >> exists: [false], isDirectory: [false], canRead: [false] ao?t 04, 2016
> > >> 11:36:12 AM org.apache.catalina.startup.ClassLoaderFactory
> > >> validateFile
> > >> AVERTISSEMENT: Problem with directory [/usr/share/tomcat7/shared],
> > exists:
> > >> [false], isDirectory: [false], canRead: [false] ao?t 04, 2016 11:36:12
> > >> AM org.apache.coyote.AbstractProtocol init
> > >> INFOS: Initializing ProtocolHandler ["http-bio-8080"] ao?t 04, 2016
> > >> 11:36:12 AM org.apache.catalina.startup.Catalina load
> > >> INFOS: Initialization processed in 720 ms ao?t 04, 2016 11:36:12 AM
> > >> org.apache.catalina.core.StandardService
> > >> startInternal
> > >> INFOS: D?marrage du service Catalina
> > >> ao?t 04, 2016 11:36:12 AM org.apache.catalina.core.StandardEngine
> > >> startInternal
> > >> INFOS: Starting Servlet Engine: Apache Tomcat/7.0.56 (Debian) ao?t 04,
> > >> 2016 11:36:12 AM org.apache.catalina.startup.HostConfig
> > >> deployDescriptor
> > >> INFOS: D?ploiement du descripteur de configuration
> > >> /etc/tomcat7/Catalina/localhost/xwiki.xml
> > >> 2016-08-04 11:36:32,385 [localhost-startStop-1] WARN
> > >> ltInstalledExtensionRepository - Invalid extension
> > >> [org.xwiki.enterprise:xwiki-enterprise-ui-mainwiki-7.1.2] on
> namespace
> > >> [wiki:xwiki] (InvalidExtensionException: No compatible extension is
> > >> installed for dependency
> > >> [org.xwiki.platform:xwiki-platform-chart-plugin-7.1.2])
> > >> 2016-08-04 11:36:32,403 [localhost-startStop-1] WARN
> > >> ltInstalledExtensionRepository - Invalid extension
> > >> [org.xwiki.contrib.forum:application-forum-ui-1.9.4]
> > >> (InvalidExtensionException: No compatible extension is installed for
> > >> dependency [org.xwiki.platform:xwiki-platform-ratings-api-6.4.4])
> > >> 2016-08-04 11:36:32,404 [localhost-startStop-1] WARN
> > >> ltInstalledExtensionRepository - Invalid extension
> > >> [org.xwiki.platform:xwiki-platform-search-lucene-ui-6.4.2] on
> > >> namespace [wiki:xwiki] (InvalidExtensionException: No compatible
> > >> extension is installed for dependency
> > >> [org.xwiki.platform:xwiki-platform-search-lucene-api-6.4.2])
> > >> 2016-08-04 11:36:35,578 [localhost-startStop-1] INFO
> > >> o.x.s.s.i.EmbeddedSolrInstance - Starting embedded Solr server...
> > >> 2016-08-04 11:36:35,578 [localhost-startStop-1] INFO
> > >> o.x.s.s.i.EmbeddedSolrInstance - Using Solr home directory:
> > >> [/var/lib/xwiki/data/solr]
> > >> 2016-08-04 11:36:39,896 [localhost-startStop-1] INFO
> > >> o.x.s.s.i.EmbeddedSolrInstance - Started embedded Solr server.
> > >> ao?t 04, 2016 11:36:40 AM org.apache.catalina.session.StandardManager
> > >> doLoad
> > >>
> > >> GRAVE: "ClassNotFoundException" lors du chargement de sessions
> > >> persistantes:
> > >> java.lang.ClassNotFoundException:
> > >> org.xwiki.container.servlet.filters.SavedRequestManager$SavedRequest
> > >> java.lang.ClassNotFoundException:
> > >> org.xwiki.container.servlet.filters.SavedRequestManager$SavedRequest
> > >>         at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> > >>         at java.lang.Thread.run(Thread.java:745)
> > >>
> > >> ao?t 04, 2016 11:36:40 AM org.apache.catalina.session.StandardManager
> > >> startInternal
> > >> GRAVE: Exception au chargement des sessions depuis le stockage
> > >> persistant (persistent storage)
> > >> java.lang.ClassNotFoundException:
> > >> org.xwiki.container.servlet.filters.SavedRequestManager$SavedRequest
> > >>         at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> > >>         at java.lang.Thread.run(Thread.java:745)
> > >>
> > >> Cordialement
> > >>
> > >> St?phane Lassire
> > >> Courriel : slass...@cesap.asso.fr
> > >>
> > >>
> > >> -----Message d'origine-----
> > >> De : users [mailto:users-boun...@xwiki.org] De la part de Thomas
> > >> Mortagne Envoy? : jeudi 4 ao?t 2016 11:03 ? : XWiki Users Objet : Re:
> > >> [xwiki-users] Xwiki on Debian 8 + Tomcat7 - GRAVE: "IOException
> > >>
> > >> It's the first time I see this error.
> > >>
> > >> Not even sure what a persistent session is. Maybe Tomcat is configured
> > >> to stored the session on disk to get it back when restarting and
> > >> something put a not serializable object
> > >> (DefaultStringEntityReferenceResolver
> > >> which is indeed not serializable) in it.
> > >>
> > >> Is XWiki running properly after that ? Even if it's indicated GRAVE it
> > >> seems to me you just lost this part of the session but XWiki does not
> > >> really expect the session to be serailized anyway so you should
> > >> probably disable that if possible.
> > >>
> > >>
> > >> _______________________________________________
> > >> users mailing list
> > >> users@xwiki.org
> > >> http://lists.xwiki.org/mailman/listinfo/users
> > >
> > >
> > >
> > > --
> > > Thomas Mortagne
> > > _______________________________________________
> > > users mailing list
> > > users@xwiki.org
> > > http://lists.xwiki.org/mailman/listinfo/users
> > > _______________________________________________
> > > users mailing list
> > > users@xwiki.org
> > > http://lists.xwiki.org/mailman/listinfo/users
> >
> >
> >
> > --
> > Thomas Mortagne
> >
> >
> > ------------------------------
> >
> > Message: 4
> > Date: Thu, 4 Aug 2016 14:14:26 +0000
> > From: Hofst?tter Mario <mario.hofstaet...@automationx.com>
> > To: "users@xwiki.org" <users@xwiki.org>
> > Subject: [xwiki-users] How to create a link to a page translation?
> > Message-ID:
> >         <e9ff2bde6bd0c34d903c19e1b596e80f44c3a...@08gr54.gawgroup.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hello,
> >
> > I want to create a wiki link which opens the current page in a given
> > language. I tried the following:
> > {{velocity}} [[English>>doc:$doc.fullName/?language=en]]{{/velocity}}
> >
> > But it does not work, it generates a create page link. I could not find
> > anything on http://platform.xwiki.org/xwiki/bin/view/Main/
> > XWikiSyntax?syntax=2.1&section=Links either.
> > How may I achieve this? Thank you.
> > Mario
> >
> >
> > ------------------------------
> >
> > Message: 5
> > Date: Thu, 4 Aug 2016 16:41:53 +0200
> > From: Thomas Mortagne <thomas.morta...@xwiki.com>
> > To: XWiki Developers <d...@xwiki.org>, XWiki Users <users@xwiki.org>
> > Subject: [xwiki-users] [ANN] Contrib Parent pom 6.4-3
> > Message-ID:
> >         <CAPnKnLG1dFJ1qC9+Xvn60xSs0ePH_39gPU9vsE89H5G0+
> > xq...@mail.gmail.com>
> > Content-Type: text/plain; charset=UTF-8
> >
> > I just released a 6.4-3 version of the Contrib Parent pom. Mostly
> > merged improvement I made in the 7.4 branch.
> >
> > --
> > Thomas Mortagne
> >
> >
> > ------------------------------
> >
> > Subject: Digest Footer
> >
> > _______________________________________________
> > users mailing list
> > users@xwiki.org
> > http://lists.xwiki.org/mailman/listinfo/users
> >
> >
> > ------------------------------
> >
> > End of users Digest, Vol 109, Issue 11
> > **************************************
> >
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