Hi Marion,

I'm not an expert in Ubuntu but when I was trying to install DSpace 6.3 in 
a multi-pass instance I am taking down notes of the steps that I did. 
Please see below.

Install Tomcat9

sudo apt-get install tomcat9 -y

Add tomcat user to dspace user group

   - 
   
   sudo adduser tomcat dspace
   - 
   
   sudo adduser dspace tomcat
   
Add "ReadWritePaths=[dspace]" to the tomcat service file under the service 
section. For ubuntu, you can find at /lib/systemd/system/tomcat9.service. 
Then, please execute the following commands:

   - 
   
   systemctl daemon-reload
   - 
   
   service tomcat9 restart
   

For UTF-8 encoding, edit server.xml:

   <Connector port="8080" protocol="HTTP/1.1"

              minSpareThreads="25"

              enableLookups="false"

              redirectPort="8443"

              connectionTimeout="20000"

              disableUploadTimeout="true"

              URIEncoding="UTF-8"/>

Edit server.xml and change the AJP connector port:

   <Connector port="8009" UIEncoding="UTF-8" tomcatAuthentication="false"

        enableLookups="false" redirectPort="8080" protocol="AJP/1.3" 
secretRequired="false" />

In the portion "ReadWritePaths=[dspace]", replace it with the actual path 
of your dspace install directory.

Hope this helps,
euler
On Tuesday, April 5, 2022 at 8:37:00 PM UTC+8 Marion Rupp wrote:

> Hi all,
>
> Recently, we upgraded our DSpace testsystem (DSpace 6.3) up to Linux 
> Ubuntu LTS 20.04. This upgrade included Tomcat 9. Now, we have the 
> problem that this Tomcat version doesn´t recognize our solr index any more.
>
> For example when I select one of our browsing categories, I get the 
> message "SolrException: SolrCore "search" is not available due to init 
> failure: Error opening new searcher..."
>
> The reason for this seems to be the write.lock file in 
> dspace/solr/search/data/index (message: "File system is only readable"). 
> I changed the write permissions, unfortunately without success.
>
> Does anyone here has experience with Tomcat 9 and Solr?
>
> Thank you for your feedback and kind regards,
> Marion
>
>
> -- 
> Marion Rupp
> Bibliotheks-IT
> Universitäts- und Landesbibliothek Bonn
> Postfach 2460, D-53014 Bonn
> Tel. 0228 / 73 75 50 Fax: 0228 / 73 75 46
> eMail: [email protected]
> Internet: http://www.ulb.uni-bonn.de
> Twitter: http://twitter.com/ulbbonn
> Facebook: http://facebook.com/ulbbonn
>
>

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