Litedb transactions. After a little while, LiteDB starts at LiteDB.

0 / NETStandard 1. x, PageSize is 8196. NET framework version are you using. Version 5. Simple API, similar to MongoDB. Validate (); var transacion = _monitor. dll Database lock timeout when entering in transaction mode after 00:01:00 I assume this means that I have a deadlock somewhere. } also found more examples of handling it the same way. System. When multiple transactions are opened in a single thread, it crashes like this. Async version 0. Find: Find one or many files in _files However, as you know, LiteDB transactions depend on thread. Insert(T entity) this is not a full report of any error, of course. And yes, you can use for gaming. Fix #2435 Transactions are not removed in LiteDB 5. From Collections Jun 10, 2024 · Transactions and Concurrency in LiteDB LiteDB supports ACID transactions, ensuring that your data operations are processed reliably and safely. The database handles concurrency using a simple locking mechanism, which is vital for applications with multiple users accessing the database simultaneously. See your data in grid or as JSON string. We are excited to see where this project goes and are looking forward to working with the community to make LiteDB the best it Dec 6, 2016 · at LiteDB. Generic. Transaction are created "per-thread". InvalidCastException: Spe The following structure defines the SQL insert syntax in LiteDB. 20) which includes #2435 :) 👍 4. This can easily be reproduced. NET 3. Mar 1, 2018 · Database is locked for more than 00:01:00. No milestone. <ToDocuments>d__26. SQLiteは良くも悪くもC May 26, 2017 · at LiteDB. If you are running in a web environment, make sure that your IIS user has write permission to the data folder. 3/2. 7 star rating. Without an index, LiteDB must execute a query using a full document scan. Should I create one singleton of LiteDB or better to create instance for each request/controller. Max * page size (4096) = 16TB for version 4. LiteDB has internal transactions (even in v4) but not expose to user to avoid keep opened. For example in some ASP. Note that if we repeat the test with version 4. I've seen this issue #597, but it doesn't look like our case. x, NETStandard 1. MoveNext() at System. ENSURE(Boolean conditional, String message) at LiteDB. LiteCollection1. I hesitate updating LiteDB to 5. いくつかの特徴はSQLiteともかぶっていると思いますが、個人的には以下の場合はLiteDBを使います。. In this article we will have a closer look at LiteDB, a . Works with a single database per domain and async read/write operations only. Commit() at LiteDB. 1 Xamarin. Code to LiteDB - A . There is no disk access in browsers so all your data will be sotored into IndexedDB and/or LocalStorage. Transaction are not thread safe. LiteDB improves search performance by using indexes on document fields or expressions. DbEngine. LiteCollection is just a simple stub (has no state). LiteDB is serverless MongoDB-like database delivered in a single DLL (less than 350kb) fully written in . All SQL commands are supported in new LiteDB. Interesting fact: it was just once since November 2017, and gone after app The LiteDB team is excited to announce that we have added two new maintainers to the project. LINQ expressions (lambda functions) can be used to create fluent API query in your C# code. The difference is: if flush = false and power off occurs AFTER database commit - this last transaction can be lost (but you program received OK for this transaction). Serverless NoSQL Document Store. LiteDB is not a plain json file that needs load everything to memory. Feb 26, 2020 · "LiteDB. Environment dotnet-sdk-3. Apr 11, 2023 · Note that we tried removing all locking on our side, but this resulted in us hitting "Lock timeout on transaction after 01:00" exceptions, followed by the "Maximum number of transactions reached". Therefore will be recommending Direct connections from LiteDb. HeaderPage. 0 Steps to reproduce create dotnet console project with TargetFramework=netcoreap LiteDB stores data as documents, which are JSON-like objects containing key-value pairs. That means that all your data resides in a single file. Collection. Aug 30, 2016 · get rid of SSD. 10 . You can write N concurrent transactions (one transaction PER thread) - but only 1 write transaction PER collection. NET NoSQL Document Store in a single data file - mbdavid/LiteDB. org. LiteException: Datafile is not a LiteDB database. Support multiple tabs - multiple transactions. I think it has to do with the update of the TaskExecution collection in between but it was always working in at least 5. 5. Can be used with file or Stream. LiteDB v5 uses BsonExpressions, which are expressions that can be directly applied to a BsonDocument. This page is powered by a knowledgeable community that helps you make an informed decision. Serverless NoSQL Document Store; Simple API similar to MongoDB; 100% C# code for . Download: Get your file from database and copy to Stream parameter. ENSURE(Boolean conditional, String message) at Jun 25, 2020 · The discussion here would seem to suggest a re-introduction of transactions was being planned for LiteDB 5, and indeed db. 0 TargetFramework: netcoreapp3. LiteException: 'This engine instance already disposed' Lets say I get 10 tasks and iterate through them then the exception comes on "Next" after processing the first Task object. 18+ due to #2435 issue. Jun 10, 2024 · LiteDB. This article is an overview about my database project LiteDB - a small, fast and free embedded . GetCollectionPage(String name, Boolean addIfNotExits) at LiteDB. QueryExecutor. cs. 16 of LiteDb we started to have problems with transactions on Shared connections. x. LiteDB can use multiples FileStream in readonly mode. dll Database lock timeout when entering in transaction mode after 00:01:00 I guess this exception is thrown because there IS some deadlock. I receive a answer for this. 13 mbdavid/LiteDB#2444 [BUG] Transactions are not removed in LiteDB 5. Documents are storaged in fragmented data pages (each page has 4096 bytes). There is only one single transaction per thread. SQL code complete (use Ctrl+Space) Edit document field in grid. NET, LiteDB is easily accessible to PowerShell and works wonderfully as a local and flexible database. Add(String name) at LiteDB. Apr 7, 2022 · Which LiteDB version/OS/. Eventually, after 1 minute of this, I get the following exception: Exception thrown: 'LiteDB. Query(String collection, Query query) at LiteDB. and you will use InMemory LiteDB instance, then every 10 seconds or any period you want commit that changes to a file. }; collection. Hi @raizam, No. Direct: The engine will open the datafile in exclusive mode and will keep it open until Dispose(). 4 of LiteDB, we do not see this I am using LiteDb as a singleton without any explicit transactions. SQLite has tables, which have rows and columns. 4. Jul 27, 2021 · 0. This is a slow solution if you compare to use BeginTrans() at start and Commit() on end, because auto transaction writes on disk after each document change. The FileStorage collection contains simple methods like: Upload: Send file or stream to database. "Small" is the primary reason people pick SQLite over the competition. " v5 was released in late Jan 2020. Collections are analogous to tables in LiteDB : 5. GetTransaction(Boolean create, Boolean queryOnly, Boolean& isNew) at LiteDB. Source code hosted on GitHub or Download Binary. 5 / NETStandard 1. NET embedded NoSQL database. BeginTrans () does exist, yet that issue is still open; so does LiteDB 5 now support transactions or not? LiteDB is a serverless database, so there is no installation. NET C# managed code (compatible with . 102 7. Journaling To guarantee data integrity and fail tolerance, LiteDB use a temporary file to write all changes before write on data file. Built-in encryption, SQL-like commands, and ACID-compliant with full transaction support LiteDB is simple and easy to use. IndexService. Insert(transactionTwo); collection. Studio admin tool. Nov 24, 2020 · I cannot find documentation on the use of transactions in LiteDB 5. – Ha Van Son. BasePage. (Concurrency of LiteDB instances). 19 and found that it resolves the "Maximum number of transactions reached" error, and also the DiskWriterQueue locking issue #2307 which has been preventing us from upgrading to v5. All locks will be removed and there is no support for Milestone. Here are multiple examples: System. Aug 25, 2017 · It operates correctly, however it returns not a string of Last Names, but the object name (System. ExitReadLock() at LiteDB. Assets4. Install it via NuGet or just copy the DLL to your bin project folder. Blazor runs in browser using WebAssembly. Nov 3, 2017 · Hi @masilver99, no. For that, I use a reader/writer async lock. LiteTransaction. Use the Commit/Rollback method to release the previous transaction. To review, open the file in an editor that reveals hidden Unicode characters. The datafile cannot be opened by another process. b__0(TransactionService transaction) at LiteDB. autoIdType is one of the supported auto id types supported ( GUID, INT, LONG, OBJECTID ). TransactionService. Rollback() LiteDB offers 2 types of connections: Direct and Shared. Threading. If you remember the good old times’ citation needed, you might remember SQL Server Compact , a single file database based on the SQL Server. NET NoSQL Document Store for . Mar 14, 2017 · Here's my scenario, I need to insert around 6 million records from a flat json file into LiteDB. After a little while, LiteDB starts throwing exceptions that the max number of transactions is reached. All tasks use their respective collections, with no concurrency at all on the collection level. IOException was occured. 15. collection is the name of the collection. create a services project, and connect that service to LiteDB, only that service, then use TCP local connection, to track your instances. Apr 3, 2020 · NullReferenceException on transaction + update + upsert Version The latest master. 17 everything works fine and transactions are released properly. 3 / NETStandard 2. 9 participants. Nov 27, 2020 · Built-in . Bugfix on memory usage â â mbdavid#102. You switched accounts on another tab or window. About LiteCollection doesnt metter, has no difference betten share same/re-create. LiteDB stores documents in collections. LiteException: Database lock timeout when entering in transaction mode after 00:01:00" Deleting the -log. To works fast with huge data in LiteDB, try to use: Apr 7, 2020 · Just like SQLite, LiteDB: is serverless, has ACID transactions, uses a single file for your data and indexes; In addition, it supports an external file storage mechanism for blobs greater than 1MB. dll into your Bin folder and add it as Reference. Development. PageService. May 15, 2024 · [BUG] LiteDB 5. f", DateTimeFormatInfo. cs This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. ReleaseTransaction(TransactionService transaction) at LiteDB. 5, 4. Data recovery after write failure (WAL log file) LiteDB is a small, fast and lightweight NoSQL embedded database. 5 / . at System. But outer transaction could not be committed because it’s cancelled. litedb. I am getting such an exception: LiteDB. LiteException: Maximum number of transactions reached at LiteDB. Windows Forms interface for LiteDB - . Each index uses: 41 bytes + LEN (name) + LEN (expression) - So if you have a two letter name for each index the maximum index count is 188. So yes, you can lost this last transaction. LiteException: The current thread already contains an open transaction. github-actions bot pushed a commit to Reddevildragg-UPM-Forks/LiteDB that referenced this issue on Nov 18, 2020. cs The operation required {length} free bytes, but the page had only {freeBytes} available. even if you leave it there, the batches should be highly unpredictable. Write () at LiteDB. Dec 23, 2016 · Have plans to use Transactions? Use an exclusive instance for that. Create a new folder inside of your models folder and name it Repos (short for repositories), inside of that folder create a new file named BlogRepo. Reload to refresh your session. I've added a simplified version of my server's code. EnsureIndex(x => x. Just copy LiteDB. Sep 17, 2021 · You signed in with another tab or window. answered Jul 27, 2021 at 10:27. LiteEngine Jun 9, 2017 · Saved searches Use saved searches to filter your results more quickly Indexes. 18 hizume/LiteDB. You can insert, update, delete or query your database using a very similar SQL relational language; LINQ expressions (lambda functions) can be used to create fluent API query in your C# code; All SQL commands are supported in new LiteDB. Using LiteDB in an ASP. LiteCollection`1. It's non systematically but it seems to happen sometimes when the application is closed and restarted like if the database file has been corrupted during the app closure. indexExpr is the expression being indexed. LiteException' in LiteDB. This is the recommended mode because it’s faster and cachable. WriteTransaction[T](String colName, Boolean addIfNotExists, Func2 action) at LiteDB. String name) [0x0003e] in :0 at LiteDB. 18 Describe the bug We use a single IDatabase instance registered as singleton. It is ideal for mobile apps or for small desktop/web apps, and its API is very similar to MongoDB C# Official Driver. get rid of transaction. Initial pre-release version. IO. Transaction[T](String collection, Boolean addIfNotExists, Func2 action) at LiteDB. I am randomly getting exceptions like this (not always mind you, just once every few thousand lookups or so): System. Complete(LiteTransaction trans) at LiteDB. More examples and online shell at LiteDB. I will provide a fix for this. First off, fantastic work on this project, very impressive. Skip to content. Max Index Value Size: 1024 B (after BSON Serialisation) Up to 255 indexes per collections, including the _id primary key, but limited to 8096 bytes for index definition. Studio admin tool The FileStorage collection contains simple methods like: Upload: Send file or stream to database. Each document stores both its data and its structure. LiteDB studio is supporting v5, my litedb is v4, i have to tick this before connect. Apr 16, 2024 · Hi. ReaderWriterLockSlim. db file lets the system carry on. Remove the predictability, toss the yield keyword out of the window. Find: Find one or many files in _files Aug 3, 2023 · Exception thrown: 'LiteDB. From version 5. Core. BsonExpression s can either be used natively (there is an implicit conversion between string and BsonExpression ) or by mapping a lambda expression (methods that take a lambda expression do this automatically). BotContext [0] [2024-01-04 07:07:23] [EventInvoker] [EXCEPTION]: at LiteDB. 18 mbdavid/LiteDB#2435 (This one probably being the best report) mbdavid/LiteDB#2436 is listed as a likely fix Jul 3, 2024 · Download LiteDB for free. 18, but 5. Find is rolled back (and outer transaction cancelled). Aug 1, 2020 · LiteDB. It does not support multiple transactions in one single thread, which means I'll now be able to use transactions at all in my scenario. x version. /// Return true if transaction was created or false if current thread already in a transaction. Upper in the stack exception get caught and index created, and query succeeds. NET Core API. Exception: LiteDB ENSURE: empty page must be defined as empty Nov 30, 2019 · Setting up LiteDB. /// If current transaction contains too much pages, now is safe to Nov 24, 2019 · Overview when testing litedb-5-beta with concurrent transaction, System. While inspecting TransactionMonitor, we only see an increasing number of transactions. TransactionMonitor. Apr 20, 2020 · I have solve my problem. NET web app. Each index storess the value of a specific expression ordered by the value (and type). LiteDB is an ACID (Atomicity, Consistency, Isolation, Durability) database, so your data transactions are always consistent across concurrency access. LiteDB supports SQL-like language for data and structure manipulations. Linq. Jan 15, 2016 · Now the same application use not more than 40Mb in RAM. Those examples are more like demo projects though, was not able to find a real project. LiteDB stores data as documents, which are JSON-like objects containing key-value pairs. mbdavid closed this as completed on Jan 18, 2016. 11. 10 - Maximum number of transactions reached mbdavid/LiteDB#1976 [BUG]Maximum number of transactions reached in 5. NET NoSQL embedded database. Jun 8, 2022 · The read lock is being released without being held. This reason is because LiteDB implement a full transaction and journal backup save. LiteEngine. Jul 23, 2020 · SQLiteとLiteDBの比較. AutoTransaction[T](Func2 fn) at LiteDB. ToString("d-MMM-yyyy:HH:mm:ss. await asyncDb2. AddNode (CollectionIndex index, BsonValue key, PageAddress dataBlock, Byte level, IndexNode la Feb 22, 2024 · Our application performs reads and writes from many different threads. a batch of 1 record, then a batch of 10 records, then a batch of 2 records, then a batch of 1 record. Try running a db. I'd like some description on what steps are required and what happens with a 'using' scope and disposal. 0 in a single DLL (less than 450kb) Thread-safe. Documents are a schema-less data structure. I love LiteDb, but its Achilles heel is the lack of support or community (a forum or Discord would be good, but sadly, no dice). That happens because when there is no index, IndexNotFoundException is thrown first, and inner transaction in DbEngine. You signed out in another tab or window. LiteDB. Update(BsonValue id, T document) Value == transaction, " current thread must contains transaction parameter "); // clear thread slot for new transaction: _slot. DamnScandalous. We will also explore what are the differences between a NoSQL and a classical SQL database are and LiteDB is a small, fast and lightweight . 0 in a single DLL (less than 300kb) Thread safe and process safe; ACID in document/operation level; Data recovery after write failure (journal mode) Oct 19, 2019 · There is not lock for read operations. LiteException: Use EnterTransaction() before EnterLock(name) Aug 13, 2015 · Performance and memory use drops in LiteDB when you are working with huge mass of data. Unlike SQLite, LiteDB is a document database. With 5. Just begin a transaction on the database and run a 'FindById' operation on a collection. LiteQueryable`1. How do I get the 'Find' command to display strings? Also, Is there somewhere that shows the procedure required for the rest of the 'Find' commands (FindOne, FindAll, FindbyId) to display query Successfully merging a pull request may close this issue. Describe the bug. While auto-checkpoint is supposed to run eventually (by default, every time the log file reaches 8MB), it might not happen if your application is always using the datafile. 1. Collections are analogous to tables in LiteDB supports SQL-like language for data and structure manipulations. Checkpoint () every once in a while. LiteDB is a serverless database delivered in a single small DLL (< 450kb) fully written in . Enumerable Mar 25, 2024 · LiteDB. Finalize() dethknite added the bug label on Jun 8, 2022. at LiteDB. NET Standard 2. Full document scans are inefficient because LiteDB must deserialize every document in the {"payload":{"allShortcutsEnabled":false,"fileTree":{"LiteDB. CREATE [ UNQIUE ] INDEX {indexName} ON {collection} ({indexExpr}) indexName is the name of the index being created. Create. CollectionService. SQLite, NeDB, and LiteDB are probably your best bets out of the 12 options considered. Describe the bug /*****/ Unhandled exception. Aug 3, 2023 · I assume that this message is awaiting some inner LiteDB lock to unlock or something. LockService. Oct 20, 2022 · LiteDB - A . Apr 6, 2021 · We test this fix by rolling it into 5. Which I assume is just different manifestation of the same problem. String name) [0x00013] in :0 Feb 17, 2021 · Version LiteDB v5. If needed, LiteDB use snapshot to read "old data version" when you are changing in another thread. 3 and 2. SQLiteはライブラリ自体インストールするだけで約5MBくらいあったので全然Liteじゃなく実行ファイルを小さくしたい. CommitAsync(); Supported API. Or, if you prefer, you can install via NuGet: Install-Package LiteDB. Tests/Engine":{"items":[{"name":"Collation_Tests. Mar 6, 2019 · DateString = DateTime. 18 Windows 11 x64 I ran a simple test with the following code and found that the latest version (5. If file already exists, file content is overwritten. Tests/Engine/Collation_Tests. GetTransaction (true, false, out var isNew); transacion Oct 1, 2016 · mbdavid commented on Oct 2, 2016. In this article, we will talk about you can use LiteDB within PowerShell and potential use cases! Jul 27, 2023 · Since LiteDB is supposed to be thread-safe, I don't use locks to synchronize reads/writes to the DB. Update(String colName, IEnumerable1 docs) at LiteDB. This class will serve as the default repository, in it we'll store all of our posts for now and maybe some more collections later. Transaction [T] (String collection, Boolean addIfNotExists, Func`2 action) Looks like write lock wasn't realesed. Mar 6, 2018 · LiteDB. Our application performs reads and writes from many different threads. 0. Furthermore, LiteDB is cross-platform, which means it can be used on Windows, macOS, Linux, and even mobile platforms like Android and iOS. We are now working on more frequent releases, better stability and performance, and better communication with the community. Keyworks are case-insensitive. We will discover the advantages of LiteDB and why it is a viable candidate for your next project. 0). Almost all functions from LiteDb have an async replacement. ExecuteQuery(Boolean executionPlan) at LiteDB. When performing a Delete or an insert in a collection, the operation fails with an "Fail: invalid page position". The same operations work fine with a new Feb 6, 2017 · I am using a LiteDatabase instance from multiple threads (as LiteDB advertises thread-safety). mbdavid added this to the v2. Delete: Delete a file reference and all data chunks. Here a finalizer for the TransactionService has to be added, which takes care of removing the transaction from the _transactions dictionary. You will see that you can not commit the transaction as it still contains open cursors Transaction are required to LiteDB works. Oct 18, 2017 · Introduction. Engine. LiteDatabase. 5 and NETStandard 2. cs","path":"LiteDB. Value = null;}} /// < summary > /// Get transaction from current thread (from thread slot or from queryOnly) - do not created new transaction /// Used only in SystemCollections to get running query transaction Jan 6, 2024 · With LiteDb I noticed in their doc LiteDatabase as a core object handling connection to the db is intstantiated and disposed immediately. GetPage[T](UInt32 pageID) at LiteDB. DropCollection (System. Insert(String collection, IEnumerable1 docs, BsonType autoId) at LiteDB. . Max Primary Key Value Size: 1024 B Some LiteDB was removed in this version (maybe can back in future). INSERT INTO {collection}[: {autoIdType}] VALUES {doc0} [, {docN}] collection is the name of the collection where the documents will be inserted. InvariantInfo), Request = request. If omitted in write operations, like Insert(), Update() and Delete(), LiteDB will create an auto transaction for each operation. 100% C# code for . ok, found the solution. NET NoSQL Document Store in a single data file. 6 goind forward. i. 5. Transactions are memory only (thats why use too many memory) and journal write in disk twice. "); } internal static LiteException DataTypeNotAssignable (string type1, string type2) { return new LiteException (DATA_TYPE_NOT_ASSIGNABLE, $"Data type {type1} is not assignable from data type {type2}"); } internal static LiteException FileNotEncrypted Nov 16, 2022 · LiteDB is a document store that gets saved into a single file. To commit. 2012 Describe the bug The database seems to get corrupted when I insert data. Insert(T document) Nov 15, 2023 · 1. NET NoSQL Document Store in a single data file - Issues · mbdavid/LiteDB LiteDB supports SQL-like language for data and structure manipulations. For more info, see Indexes. An open source MongoDB-like database with zero configuration. If flush = true, LiteDB will wait real write on this before LiteDB - A . This affects how the engine opens the data file. No branches or pull requests. Apr 24, 2023 · With its built-in query language, LiteDB provides an intuitive way for developers to search, insert, update, and delete data, as well as perform advanced operations like indexing and transactions. using(var db = new LiteDatabase(@"C:\Temp\MyData. Let's open up the file and create a new repo Nov 22, 2021 · Read the fine manual - it says theoretically UInt. Describe the bug In a new database with a not yet existing collection, combination of transaction, update, and upsert results in NRE. db")) {. But, my "problem" now is that I read and understand more about WAL (Write Ahead Logging). Next, I can read directly from disc, convert into a BsonDocument and insert the Unfortunately, the TransactionService for a closed thread will not be removed from the _transactions dictionary within the TransactionMonitor. A collection is a group of related documents that have a set of shared indices. Test to reproduce: Jan 26, 2022 · System. So please push for a new release (5. 18) throws a "Maximum number of transactions reached" error, but the older version 5. e. Constants. 0 milestone on Jan 18, 2016. The system grabs data from the db every minute(ish) and sends it to a SQL db elsewhere, and this happens when the system is left alone, so no new data is being added etc. Exception: LiteDB ENSURE: transaction must be active to rollback (current state: Disposed) at LiteDB. May 16, 2018 · If you this parameter, LiteDB uses Flush (true) option after write on disk. ReadContent(ByteReader reader) at LiteDB. <>c__DisplayClass7_0. 该问题出现自 Commit#0c2b764 后 群聊log fail: Lagrange. NewPage[T](BasePage prevPage) at LiteDB. RefID); } } I need either a Linq method of finding the most recent entry, or is it like a queue where I can just pop off the first value in the return query and get There is nothing in docs about how to use LiteDB from multi threading point of view. The only synchronization that I do is between the GC and regular read/writes to the DB. Every page loaded are keep in memory until reach 5000 pages, when a recycle process clear pages. Form1+Employee]). org/docs/ lacks any talk of transactions as far as I can tell. It is merely a cache for me, not much actual concurrency is there. This will be obvious to some, but I'm exploring keeping an instance of the database open for the lifetime of the application vs open and closing it on each CRUD, storing the data objects in memory in between. Studio. This is truly terrible, since transaction is a very powerful feature. ACID with full transaction support. Add to Safari. After a little while, LiteDB starts at LiteDB. using LiteDB; namespace Jul 14, 2021 · LiteDBのコレクション参照 こういったクラスがあったとして public class StockTag { public int Id { get; set; } public string Name { get; set; } public List<StockTag> Children { get; set; } } Feb 7, 2024 · Find the best product instantly. Jan 5, 2021 · use service. You can insert, update, delete or query your database using a very similar SQL relational language. NET in a single datafile - and now it's in new version 4. Apparently, for 5. So, if engine has a fixed list of items to insert/update/delete, all operations can be done in a single transaction. Now. Forms v5. If you read the file manual that you linked to, the top of the page says "This documentation is valid only for v4. Nobody is going to get an SSD just for using LiteDB. 1 participant. The documentation site at https://www. SQL code syntax highlighting. List'[LITEDB. Will the PR #2436 merged? Transaction. ReadPage(Byte[] buffer) at LiteDB. I treat the GC as a writer, and all other accesses to the DB are considered readers (since supposedly, LiteDB is Feb 1, 2020 · It seems like the 'FindById' operation on the database (and potentially other operations as well), leave an open cursor on the transaction. CreateSnapshot(LockMode mode, String collection, Boolean addIfNotExists) at LiteDB. Dispose(Boolean dispose) at LiteDB. NET 4. 13 does not. /// </summary> public bool BeginTrans () { _state. dx nj yp bu nt jq ai jx ei iz