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“Failed to Start Advanced Key-Value Store” Error in Redis

by Nikhath K | Published on February 25, 2025 | Updated on February 25, 2025

Learn how to fix the “Failed to Start Advanced Key-Value Store” error in Redis. Our Redis Support team is here to help you with your questions and concerns.

“Failed to Start Advanced Key-Value Store” Error in Redis

"Failed to Start Advanced Key-Value Store" Error in RedisThe “failed to start advanced key-value store” error in Redis lets us know that the Redis server couldn’t initialize properly.

This error can cause severe issues, especially if Redis is central to the application’s data storage or caching mechanisms.

Impacts of the Error

  • Applications relying on Redis experience downtime, leading to degraded performance or unavailability of crucial features.
  • If the issue stems from corrupted persistence files like the Append Only File (AOF), unsaved data might be lost.
  • Redis failures can cascade, causing dependent services (like background processes) to halt.
  • Repeated restart attempts may spike CPU and memory usage, affecting other applications.
  • System administrators must spend time troubleshooting, diverting attention from other tasks.
  • End-users may face app instability, leading to frustration and negative feedback.

Common Causes and Fixes

1. Service Masked

Redis service may be masked, blocking it from starting.

Click here for the Solution.
  1. Unmask the service: 
    sudo systemctl unmask redis-server.serviceCopy Code
  2. Then, reload systemd daemon: 
    sudo systemctl daemon-reloadCopy Code
  3. Start Redis: 
    sudo systemctl start redis-server.service
Copy Code
  4. Confirm status: 
    sudo systemctl status redis-server.serviceCopy Code

2. Configuration Errors

Incorrect entries in the Redis configuration file.

Click here for the Solution.
  1. Validate configuration: 
     sudo redis-server /etc/redis/redis.conf --test-memory 1Copy Code
  2. Then, edit the config file: 
     sudo nano /etc/redis/redis.confCopy Code
  3. Restart Redis: 
    sudo systemctl restart redis-server.serviceCopy Code

3. Insufficient Memory

Redis may fail if the server runs out of memory.

Click here for the Solution.
  1. Edit sysctl configuration: 
    sudo nano /etc/sysctl.confCopy Code
  2. Enable memory overcommitment: 
    vm.overcommit_memory = 1Copy Code
  3. Apply changes: 
    sudo sysctl -pCopy Code
  4. Restart Redis: 
    sudo systemctl restart redis-server.serviceCopy Code

4. Missing Log Directory

The log directory specified in the Redis config may be missing.

Click here for the Solution.
  1. Create log directory: 
    sudo mkdir -p /var/log/redisCopy Code
  2. Set correct ownership: 
    sudo chown redis:redis /var/log/redisCopy Code
  3. Restart Redis: 
    sudo systemctl restart redis-server.serviceCopy Code

5. Running Directory Conflicts

Conflicts with existing directories Redis expects.

Click here for the Solution.
  1. Check directory conflicts: 
    ls /var/run/redisCopy Code
  2. Then, remove or rename directory: 
    sudo rm -rf /var/run/redisCopy Code
  3. Restart Redis: 
    sudo systemctl restart redis-server.serviceCopy Code

6. Systemd Configuration Issues

Misconfigured systemd service file.

Click here for the Solution.
  1. Edit service file: 
    sudo nano /etc/systemd/system/redis.serviceCopy Code
  2. Then, ensure correct entries: 
    
[Unit]
Description=Redis In-Memory Data Store
After=network.target
[Service]
User=redis
Group=redis
ExecStart=/usr/bin/redis-server /etc/redis/redis.conf
ExecStop=/usr/bin/redis-cli shutdown
Restart=always
[Install]
WantedBy=multi-user.target
Copy Code
  3. Reload systemd daemon: 
    sudo systemctl daemon-reloadCopy Code
  4. Start Redis: 
    sudo systemctl start redis-server.serviceCopy Code

Prevention Measures

  • Use monitoring tools to keep track of Redis’s memory usage and service health.
  • Always back up Redis configuration files before making changes.
  • Ensure Redis and system packages are up-to-date.
  • Allocate sufficient CPU and RAM for Redis workloads.

[Need assistance with a different issue? Our team is available 24/7.]

Conclusion

We can maintain Redis stability and keep our applications running smoothly by troubleshooting the error and implementing preventive strategies.

In brief, our Support Experts demonstrated how to fix the “Failed to Start Advanced Key-Value Store” error in Redis.

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  3. How to Fix Error “Getaddrinfo Eai_Again Redis?”
  4. How to Fix Error 99 connecting to localhost:6379 in Redis?
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