• Hosting Flash Sale: Starting at $0.43/mo for a limited time
Client Area
Client Area

Python Selector “IndexError: string index out of range” – Root Cause & Fix (CloudLinux Bug)

 Issue Summary

After a recent CloudLinux update, Python Selector and other related features stopped working. Attempting to use Python Selector in cPanel or CLI produced this error:

CloudLinux Official Doc but it wont help me : https://cloudlinux.zendesk.com/hc/en-us/articles/21103017760540-Error-in-Python-application-IndexError-string-index-out-of-range-Traceback
Error in Python application
IndexError: string index out of range
Traceback (most recent call last):
...

Meanwhile, the lvemanager service was either:

  • Not running (inactive (dead)), or

  • Throwing JSON-related errors.

 Root Cause

The issue was introduced by a buggy release of lvemanager — specifically:

lvemanager.noarch 7.11.24-1.el8.cloudlinux

In this version:

  • Critical configuration or cache files were missing or mislocated, such as:

    • /usr/share/l.v.e-manager/lvemanager/cache/users.json

    • /usr/share/l.v.e-manager/panelless-version/lvemanager/config.json

  • The Python Selector could not function due to broken internal state or missing cache.

  • Services relying on lvemanager logic, like Selector, silently failed or produced Python exceptions.

Diagnosis Steps

  1. Checked the LVE Manager service:

    systemctl status lvemanager

    Output showed:

    inactive (dead)

  2. Looked for JSON/config files:

    ls /usr/share/l.v.e-manager/lvemanager/cache/

    Result:

    No such file or directory

  3. Checked package availability:

    yum --enablerepo=* list lvemanager --showduplicates | grep 7.11.24

    Output:

    lvemanager.noarch 7.11.24-1.el8.cloudlinux cloudlinux-updates-testing

    This confirmed that the problematic version came from the cloudlinux-updates-testing repo.

 Solution (Fix)

  1. Removed broken version:

    yum remove lvemanager

  2. Installed stable version (from working server or previous release):

    yum install lvemanager-7.11.23 --enablerepo=cloudlinux-x86_64-server-8

    (You can also download the RPM manually from another server or CloudLinux repo mirror)

  3. Restarted related services:

    systemctl restart lvemanager
    cagefsctl --force-update

  4. Python Selector started working again, and the “IndexError” was gone.


 Final Status

  • ✅ Python Selector working

  • ✅ lvemanager service running

  • ✅ SSH access fixed

  • ✅ No IndexError in Python applications

 Recommendation

Avoid enabling the cloudlinux-updates-testing repo on production unless you’re testing in a staging environment. Stick to stable releases unless directed by CloudLinux support.

Tags:

Leave a Reply