LiteDB Configuration Issues

Oct 13, 2025 by leolavanderia.com.br 98 views

Introduction

LiteDB is a lightweight, NoSQL database that is widely used in various applications, including game servers. However, like any other database, it is not immune to errors and crashes. In this article, we will delve into a server crash caused by LiteDB and explore the possible reasons behind it.

The Server Crash

The server crash occurred on the Incroyaux server, and the stacktrace provided reveals a cryptic error message:

[20:57:36.631] [559] [Error] [Eco] System.Exception: LiteDB ENSURE: empty page must be defined as empty type
   at LiteDB.Constants.ENSURE(Boolean conditional, String message)
   at LiteDB.Engine.Snapshot.NewPage[T]()
   at LiteDB.Engine.Snapshot.GetFreeDataPage(Int32 bytesLength)
   at LiteDB.Engine.DataService.<>c__DisplayClass3_0.<<Insert>g__source|0>d.MoveNext()
   at LiteDB.Engine.DataService.Insert(BsonDocument doc)
   at LiteDB.Engine.LiteEngine.InsertDocument(Snapshot snapshot, BsonDocument doc, BsonAutoId autoId, IndexService indexer, DataService data)
   at LiteDB.Engine.LiteEngine.<>c__DisplayClass7_0.<Insert>b__0(TransactionService transaction)
   at LiteDB.Engine.LiteEngine.AutoTransaction[T](Func`2 fn)
   at Eco.Stats.Stats.<>c__DisplayClass31_0.<RecordBulk>b__1(IGrouping`2 group)
   at Eco.Shared.Utils.EnumerableExtensions.ForEach[T](IEnumerable`1 enumeration, Action`1 action)
   at Eco.Gameplay.GameActions.GameActionManager.TryPerformActions(PackFlags flags, List`1 actions, IEnumerable`1 preTests, IEnumerable`1 postEffects, AccountChangeSet acc)
   at Eco.Gameplay.GameActions.GameActionManager.GetResultWithLock(GameActionPack pack)
   at Eco.Gameplay.GameActions.GameActionManager.TryPerformActions(User userToNotify, GameActionPack pack)
   at Eco.Gameplay.Placement.WorldObjectPlacementUtils.TryPlaceWorldObjectNow(Player player, IPlaceableItem item, ItemStack containingStack, Vector3 pos, Quaternion rot, Int32 placeOnSurfaceOfObjectID)
   at Eco.Gameplay.Items.WorldObjectItem.Place(Player player, Vector3 pos, Quaternion rotation, Int32 placeOnSurfaceOfObjectID)
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_1(Object state)
   at System.Threading.QueueUserWorkItemCallback.Execute()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()

Possible Causes

After analyzing the stacktrace, we can identify several possible causes for the server crash:

LiteDB Configuration Issues: The error message suggests that there is a problem with the LiteDB configuration. Specifically, it mentions that an empty page must be defined as an empty type. This could be due to a misconfigured database or a bug in the LiteDB library.
Database Corruption: The error message also suggests that the database may be corrupted. This could be due to a variety of factors, including hardware failures, software bugs, or user errors.
Concurrency Issues: The stacktrace reveals that the error occurred while trying to insert a document into the database. This could be due to a concurrency issue, where multiple threads are trying to access the database simultaneously.

Investigation

To investigate the cause of the server crash, we need to gather more information about the server and the database. Here are some steps we can take:

Check the Server Logs: We need to check the server logs to see if there are any other error messages or warnings that may be related to the crash.
Analyze the Database: We need to analyze the database to see if there are any issues with the data or the database configuration.
Test the Server: We need to test the server to see if the crash is reproducible and if there are any other issues that may be related to the crash.

Conclusion

In conclusion, the server crash due to LiteDB is a complex issue that requires a thorough investigation. By analyzing the stacktrace, checking the server logs, and analyzing the database, we can identify the possible causes of the crash and take steps to prevent it from happening again in the future.

Recommendations

Based on our investigation, we recommend the following:

Check the LiteDB Configuration: We recommend checking the LiteDB configuration to ensure that it is correctly set up and that there are no issues with the database.
Analyze the Database: We recommend analyzing the database to see if there are any issues with the data or the database configuration.
Test the Server: We recommend testing the server to see if the crash is reproducible and if there are any other issues that may be related to the crash.

Future Work

In the future, we plan to:

Improve the LiteDB Configuration: We plan to improve the LiteDB configuration to ensure that it is correctly set up and that there are no issues with the database.
Analyze the Database: We plan to analyze the database to see if there are any issues with the data or the database configuration.
Test the Server: We plan to test the server to see if the crash is reproducible and if there are any other issues that may be related to the crash.

Conclusion

Introduction

In our previous article, we delved into a server crash caused by LiteDB and explored the possible reasons behind it. In this article, we will provide a comprehensive Q&A section to help you better understand the issue and how to prevent it from happening again in the future.

Q: What is LiteDB and how does it relate to the server crash?

A: LiteDB is a lightweight, NoSQL database that is widely used in various applications, including game servers. In this case, the server crash was caused by a LiteDB error, which suggests that there may be an issue with the database configuration or the LiteDB library itself.

Q: What is the error message "LiteDB ENSURE: empty page must be defined as empty type" and what does it mean?

A: The error message "LiteDB ENSURE: empty page must be defined as empty type" is a cryptic error message that suggests that there is a problem with the LiteDB configuration. Specifically, it means that an empty page must be defined as an empty type, which is a requirement for LiteDB to function correctly.

Q: What are the possible causes of the server crash?

A: The possible causes of the server crash include:

LiteDB Configuration Issues: The error message suggests that there is a problem with the LiteDB configuration. Specifically, it means that an empty page must be defined as an empty type, which is a requirement for LiteDB to function correctly.
Database Corruption: The error message also suggests that the database may be corrupted. This could be due to a variety of factors, including hardware failures, software bugs, or user errors.
Concurrency Issues: The stacktrace reveals that the error occurred while trying to insert a document into the database. This could be due to a concurrency issue, where multiple threads are trying to access the database simultaneously.

Q: How can I prevent the server crash from happening again in the future?

A: To prevent the server crash from happening again in the future, you can take the following steps:

Check the LiteDB Configuration: Ensure that the LiteDB configuration is correctly set up and that there are no issues with the database.
Analyze the Database: Analyze the database to see if there are any issues with the data or the database configuration.
Test the Server: Test the server to see if the crash is reproducible and if there are any other issues that may be related to the crash.

Q: What are the best practices for using LiteDB in a game server?

A: The best practices for using LiteDB in a game server include:

Use a consistent database configuration: Ensure that the LiteDB configuration is consistently set up across all servers.
Monitor the database for errors: Monitor the database for errors and take corrective action if necessary.
Test the server regularly: Test the server regularly to ensure that it is functioning correctly and that there are no issues with the database.

Q: What are the common issues that can cause a server crash due to LiteDB?

A: The common issues that can cause a server crash due to LiteDB include:

Database corruption: Database corruption can cause a server crash due to LiteDB.
Concurrency issues: Concurrency issues can cause a server crash due to LiteDB.
LiteDB configuration issues: LiteDB configuration issues can cause a server crash due to LiteDB.

Q: How can I troubleshoot a server crash due to LiteDB?

A: To troubleshoot a server crash due to LiteDB, you can take the following steps:

Check the server logs: Check the server logs to see if there are any error messages or warnings that may be related to the crash.
Analyze the database: Analyze the database to see if there are any issues with the data or the database configuration.
Test the server: Test the server to see if the crash is reproducible and if there are any other issues that may be related to the crash.

Conclusion

In conclusion, the server crash due to LiteDB is a complex issue that requires a thorough investigation. By understanding the possible causes of the crash and taking steps to prevent it from happening again in the future, you can ensure that your game server is running smoothly and efficiently.