The following error was encountered during logging in to D365. I am not sure what the reason was.

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Posted on by Stone Huang

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https://dev.XXXXXX.com/_common/error/errorhandler.aspx?BackUri=https://adfs.XXXXXX.com/&ErrorCode=0x80040216&Parm0=
Error Details: Could not acquire Write lock in time 180000 milliseconds. Lock mode: Write. Lock name: MASTER_SITE_MAP: {XXXXXXXX-25ad-44f0-800c-1497337d5bb8}1033&RequestUri=/main.aspx&user_lcid=1033

Does anyone know why?

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Microsoft Dynamics CRM

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Holly Huffman 6,534 Super User 2025 Season 2 on at

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Hi there! Good morning, evening, or afternoon - depending on where you are :) Hope you are well today!

The error message indicates that Dynamics 365 encountered a timeout while trying to acquire a write lock on the MASTER_SITE_MAP. This issue can arise due to several reasons, such as:

High Server Load: If the server is under heavy load, it may struggle to process requests in a timely manner. This could be caused by high CPU or memory usage, possibly from other processes running on the server.

Database Locking: The error suggests a locking issue in the database. This could happen if multiple processes are trying to access or modify the same resource simultaneously, leading to contention.

Configuration or Deployment Issues: If there have been recent updates or changes to the system, such as a CRM update or deployment, it might have caused inconsistencies or locking issues.

Suggested Steps to Resolve:

Check Server Performance: Monitor the server's CPU, memory, and disk usage to ensure it’s not overloaded. Address any performance bottlenecks.

Review Recent Changes: If there were recent updates or deployments, ensure that all components (server, database, etc.) are fully updated and configured correctly.

Restart Services: Restarting the Dynamics 365 services or the server itself can sometimes resolve transient locking issues.

Database Maintenance: Check for any locks in the database and release them if necessary. Ensure regular database maintenance tasks are being performed.

Consult Logs: Review the event logs and trace files for more detailed information about what might be causing the issue.

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Stone Huang 455 on at

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Hi Holly,

Thanks for your reply, I found out the cause of this problem，It was because the D365 I built locally could not find the correct IP address. I turned off the Internet network card in the virtual machine's dual network card and only kept the connection to another virtual machine.

I just didn't understand why this would happen if I had configured the ip address in my virtual machine's host file.

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