SOLR & Java Issue After cPanel Update Causing Roundcube Failures [Resolved]

There is issue reported and most of servers experiencing an issue with latest cPanel update to 11.110.0.68 with email accounts. When we search for specific emails within the account into Roundcube webmail interface, we receive the following error message:

"An error occurred! Server error! (Internal server error)"

Additionally, while we attempt to delete some emails using Roundcube, the deleted emails appear to be removed initially but then reappear in the account.

if you have tried converting the database from MySQL to SQLite, it’s also failing and now unable to login email accounts or access webmail.

This is known issue to the cPanel with latest updates due to cPanel Dovecot SOLR service with following errors that service is unable to start with following errors.

[/usr/local/cpanel/scripts/update-packages] Job for cpanel-dovecot-solr.service failed because the control process exited with error code. See "systemctl status cpanel-dovecot-solr.service" and "journalctl -xe" for details.

server.hostname solr[36301]: OpenJDK 64-Bit Server VM (build 25.422-b05, mixed mode)
server.hostname solr[36301]: Please install latest version of Java 11 or set JAVA_HOME properly.

This is due to recent update with “tzdata-java” to be compliant along with 2025 timezone changes. and Java version unable to read timezone data. Hence cPanel Dovecot SOLR service is unable to start with cPanel server.

This issue can be solved by downgrading the tzdata-java package on cPanel server.

For CentOS 7

yum downgrade tzdata-java

Once you have downgrade the package, its recommended to version lock tzdata-java package.

yum install https://vault.centos.org/7.9.2009/os/x86_64/Packages/yum-plugin-versionlock-1.1.31-54.el7_8.noarch.rpm
yum install yum-versionlock

For CloudLinux 8+, AlmaLinux and Rocky Linux:

dnf install python3-dnf-plugin-versionlock
yum versionlock tzdata-java

Once ackage is version locked, please run the following command to package is version locked for nest 15 dats :
echo “yum versionlock delete ” | at now + 15 days

To verify the packages which are currently version locked using below command :
yum versionlock list

For other OS than CloudLinux 7 and CentOS, you can edit following file :

/etc/sysconfig/cpanel-dovecot-solr

SOLR_JAVA_HOME="/usr/lib/jvm/jre-1.8.0"
to
SOLR_JAVA_HOME="/usr/lib/jvm/jre-11"

Save and exit file and restart cpanel_dovecot_solr service.

/scripts/restartsrv_cpanel_dovecot_solr