0x0000012c – Error_Oplock_Not_Granted – the Oplock Request Is Denied

The error code 0x0000012c means that a request for an opportunistic lock (oplock) was not allowed.

This usually happens when too many users or programs are trying to open the same file at the same time, causing conflicts. When this error occurs, you might notice slow file access, trouble sharing files, or even some programs crashing.

To fix it, check if users have the right permissions and update software or network settings. It's important to solve these issues, as they can slow down the network and make it harder to work together. Taking steps to prevent this can help keep everything running smoothly.

Error meaning:

The "Error: Oplock Not Granted" means a request to temporarily lock a file for faster access was denied.

This usually happens when another program is using the file, which can cause problems with sharing and saving information.

Causes:

  • Multiple users or apps trying to open the same file at the same time, causing permission conflicts.
  • Problems with the network that interrupt communication between the client and server.
  • Not enough system resources like memory or processing power to support oplock functions.
  • Incorrect settings on the server, especially related to file sharing.
  • Old drivers or software that don't support oplock features.

Symptoms:

Symptoms of the "Oplock Not Granted" error:

  1. Slower file access: Opening, saving, or editing files takes much longer than usual.
  2. File locking problems: Difficulty accessing shared files on a network, leading to error messages.
  3. Application crashes: Programs may freeze or crash when trying to open files on affected servers.
  4. Syncing issues: Problems when multiple users try to make changes at the same time, causing conflicts.

Solutions:

Step 1: Check User Permissions

Make sure all users have the right access to the shared files and folders.

You can do this by going to the file or folder properties and looking at the permissions.

Step 2: Adjust Network Settings

Look at the Client-Server communication settings.

Try changing the network settings to make sure everything works better together.

Step 3: Update Software

Check if there are any updates or patches available for your operating system and any programs you are using.

Installing these updates can fix bugs that cause errors.

Step 4: Disable Opportunistic Locking (Oplocks)

If the error continues, try turning off opportunistic locking for a little while.

This will help you see if it solves the problem.

Step 5: Review Network Logs

Look at the network logs to find any strange activities or problems that could be causing issues with file access.

This can help you understand if there are deeper network problems.

Impact:

  • Slower file access: Without an oplock, files take longer to open and save.
  • Increased network traffic: Clients have to talk to the server more often, which uses up more internet bandwidth.
  • Higher latency: There's a delay in communication between the client and server, making everything feel slower.
  • Reduced application performance: Programs may run poorly or take longer to respond.
  • Risk of file corruption: More people accessing the same file at once can lead to mistakes and lost information.
  • Errors in applications: Some programs might not work correctly, causing frustration and interruptions.
  • Lower productivity: Users can't work as efficiently, which can slow down the whole organization.

Relevance:

Oplock errors are important for organizations that use networked file systems, especially with Windows versions like Windows 10, Windows Server 2016, and Windows Server 2019.

These errors can happen with software that accesses files over a network, like Microsoft Office or file-sharing programs. When an oplock request is denied, it can cause problems with accessing files and slow down the system.

It might also lead to mistakes in the data. If these errors happen a lot, it could mean there are problems with the network or the way files are shared.

Organizations need to pay attention to these errors to keep everything running smoothly and to protect their data.

Prevention:

How to Avoid Oplock Errors in the Future:

1. Check Oplock Settings:

Make sure to regularly review and adjust the oplock settings on your servers based on what your organization needs.

2. Update Client Software:

Always keep your software up-to-date to prevent compatibility problems that can cause oplock errors.

3. Use Network Monitoring Tools:

Set up tools that watch your network for issues, so you can catch potential problems before they become big issues.

4. Teach Proper File Access:

Educate users on how to correctly access files to avoid actions that could lead to oplock denials.

5. Back Up Data Regularly:

Make regular backups of important files to protect against losses caused by oplock issues.

6. Review File-Sharing Policies:

Update your file-sharing rules to keep them effective and reduce disruptions from oplock problems.

People Also Ask

What Does "Oplock" Stand for in Networking?

In networking, "oplock" means "opportunistic locking." It's a way for computers to work faster by letting one computer keep a copy of a file. This helps it access the file quickly while still making sure the main server has the right and updated information.

How Can I Check My System's Oplock Status?

To check your system's oplock status, use tools like Windows Performance Monitor or Process Monitor. These programs show you how oplocks are working. They can help you find problems with file access and network speed.

Are There Different Types of Oplocks?

Yes, there are different types of oplocks! They include Batch Oplocks, Exclusive Oplocks, and Level II Oplocks. Each type helps manage how files are accessed and keeps things running smoothly when many people use the same files on a network.

Does This Error Affect All Operating Systems?

The error mostly affects operating systems like Windows that use something called opportunistic locking or oplock. How much it affects each system can depend on how it's set up and the file-sharing methods it uses.

Can Antivirus Software Interfere With Oplock Requests?

Yes, antivirus software can mess with oplock requests. When it checks files while they are being used, it can cause problems between your computer and the file server. This might slow things down or even stop some requests from going through.

Anand Thakur

Early on, I worked extensively on a project to find and fix errors in these systems, and I now share tips and solutions on my blog. I enjoy troubleshooting complex problems and find it rewarding to offer practical advice that makes technology more accessible for others.

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