UI fails to load - LidarrErrorPipeline|Npgsql.NpgsqlException: Exception while reading from stream #4221

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opened 2026-02-20 13:17:41 -05:00 by deekerman · 0 comments

deekerman commented

2026-02-20 13:17:41 -05:00

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Originally created by @EdwinGarcia on GitHub (Dec 9, 2025).

Is there an existing issue for this?

I have searched the existing open and closed issues

Current Behavior

Failed to load Lidarr Version 3.1.0.4875

Based on what I read in the trace logs, it's got something to do with the frontend timing out the postgres backend, but i havent changed anything on my setup in years and both Sonarr and Radarr are working fine using the same backend DB, and Lidarr is still grabbing new releases and processing them, it's just the web UI isn't working.

Any suggestions for troubleshooting or debugging?

Expected Behavior

Web UI to load

Steps To Reproduce

No response

Environment

- OS: Unraid 7.2.1
- Lidarr: 3.1.0.4875
- Docker Install: Yes
- Using Reverse Proxy: Yes, NPM v2.12.6 (issue also happens without Reverse Proxy)
- Browser: Firefox 145.0.2 (64-bit)
- Database: PostgreSQL 15.15 (Debian 15.15-1.pgdg13+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 14.2.0-19) 14.2.0, 64-bit (

What branch are you running?

Master

Trace Logs?

Gist link

Excerpt from the relevant part (I think):

2025-12-09 11:05:51.1|Warn|LidarrErrorPipeline|Npgsql.NpgsqlException: Exception while reading from stream

[v3.1.0.4875] Npgsql.NpgsqlException (0x80004005): Exception while reading from stream
 ---> System.TimeoutException: Timeout during reading attempt
   at Npgsql.Internal.NpgsqlConnector.ReadMessageLong(Boolean async, DataRowLoadingMode dataRowLoadingMode, Boolean readingNotifications, Boolean isReadingPrependedMessage)
   at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource<TResult>.GetResult(Int16 token)
   at Npgsql.NpgsqlDataReader.<ReadMessage>g__ReadMessageSequential|49_0(NpgsqlConnector connector, Boolean async)
   at Npgsql.NpgsqlDataReader.NextResult(Boolean async, Boolean isConsuming, CancellationToken cancellationToken)
   at Npgsql.NpgsqlDataReader.NextResult(Boolean async, Boolean isConsuming, CancellationToken cancellationToken)
   at Npgsql.NpgsqlCommand.ExecuteReader(Boolean async, CommandBehavior behavior, CancellationToken cancellationToken)
   at Npgsql.NpgsqlCommand.ExecuteReader(Boolean async, CommandBehavior behavior, CancellationToken cancellationToken)
   at Npgsql.NpgsqlCommand.ExecuteReader(CommandBehavior behavior)
   at Npgsql.NpgsqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
   at Dapper.SqlMapper.ExecuteReaderWithFlagsFallback(IDbCommand cmd, Boolean wasClosed, CommandBehavior behavior) in /_/Dapper/SqlMapper.cs:line 1185
   at Dapper.SqlMapper.QueryImpl[T](IDbConnection cnn, CommandDefinition command, Type effectiveType)+MoveNext() in /_/Dapper/SqlMapper.cs:line 1213
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at Dapper.SqlMapper.Query[T](IDbConnection cnn, String sql, Object param, IDbTransaction transaction, Boolean buffered, Nullable`1 commandTimeout, Nullable`1 commandType) in /_/Dapper/SqlMapper.cs:line 844
   at NzbDrone.Core.ArtistStats.ArtistStatisticsRepository.Query(SqlBuilder builder, String template) in ./NzbDrone.Core/ArtistStats/ArtistStatisticsRepository.cs:line 62
   at NzbDrone.Core.ArtistStats.ArtistStatisticsRepository.ArtistStatistics() in ./NzbDrone.Core/ArtistStats/ArtistStatisticsRepository.cs:line 32
   at NzbDrone.Core.ArtistStats.ArtistStatisticsService.<ArtistStatistics>b__3_0() in ./NzbDrone.Core/ArtistStats/ArtistStatisticsService.cs:line 41
   at NzbDrone.Common.Cache.Cached`1.Get(String key, Func`1 function, Nullable`1 lifeTime) in ./NzbDrone.Common/Cache/Cached.cs:line 98
   at NzbDrone.Core.ArtistStats.ArtistStatisticsService.ArtistStatistics() in ./NzbDrone.Core/ArtistStats/ArtistStatisticsService.cs:line 41
   at Lidarr.Api.V1.Artist.ArtistController.AllArtists(Nullable`1 mbId) in ./Lidarr.Api.V1/Artist/ArtistController.cs:line 136
   at lambda_method47(Closure, Object, Object[])
   at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncObjectResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Lidarr.Http.Middleware.BufferingMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/BufferingMiddleware.cs:line 27
   at Lidarr.Http.Middleware.IfModifiedMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/IfModifiedMiddleware.cs:line 40
   at Lidarr.Http.Middleware.CacheHeaderMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/CacheHeaderMiddleware.cs:line 32
   at Lidarr.Http.Middleware.StartingUpMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/StartingUpMiddleware.cs:line 37
   at Lidarr.Http.Middleware.UrlBaseMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/UrlBaseMiddleware.cs:line 28
   at Lidarr.Http.Middleware.VersionMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/VersionMiddleware.cs:line 28
   at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.InvokeCore(HttpContext context)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddlewareImpl.<Invoke>g__Awaited|10_0(ExceptionHandlerMiddlewareImpl middleware, HttpContext context, Task task)

Trace Logs have been provided as applicable. Reports may be closed if the required logs are not provided.

I have read and followed the steps in the wiki link above and provided the required trace logs - the logs contain trace - that are relevant and show this issue.

Originally created by @EdwinGarcia on GitHub (Dec 9, 2025). ### Is there an existing issue for this? - [x] I have searched the existing open and closed issues ### Current Behavior `Failed to load Lidarr Version 3.1.0.4875` Based on what I read in the trace logs, it's got something to do with the frontend timing out the postgres backend, but i havent changed anything on my setup in years and both Sonarr and Radarr are working fine using the same backend DB, and Lidarr is still grabbing new releases and processing them, it's just the web UI isn't working. Any suggestions for troubleshooting or debugging? ### Expected Behavior Web UI to load ### Steps To Reproduce _No response_ ### Environment ```markdown - OS: Unraid 7.2.1 - Lidarr: 3.1.0.4875 - Docker Install: Yes - Using Reverse Proxy: Yes, NPM v2.12.6 (issue also happens without Reverse Proxy) - Browser: Firefox 145.0.2 (64-bit) - Database: PostgreSQL 15.15 (Debian 15.15-1.pgdg13+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 14.2.0-19) 14.2.0, 64-bit ( ``` ### What branch are you running? Master ### Trace Logs? [Gist link](https://gist.github.com/EdwinGarcia/d2437a898e2abc471deb83917a5638d4) Excerpt from the relevant part (I think): ``` 2025-12-09 11:05:51.1|Warn|LidarrErrorPipeline|Npgsql.NpgsqlException: Exception while reading from stream [v3.1.0.4875] Npgsql.NpgsqlException (0x80004005): Exception while reading from stream ---> System.TimeoutException: Timeout during reading attempt at Npgsql.Internal.NpgsqlConnector.ReadMessageLong(Boolean async, DataRowLoadingMode dataRowLoadingMode, Boolean readingNotifications, Boolean isReadingPrependedMessage) at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource<TResult>.GetResult(Int16 token) at Npgsql.NpgsqlDataReader.<ReadMessage>g__ReadMessageSequential|49_0(NpgsqlConnector connector, Boolean async) at Npgsql.NpgsqlDataReader.NextResult(Boolean async, Boolean isConsuming, CancellationToken cancellationToken) at Npgsql.NpgsqlDataReader.NextResult(Boolean async, Boolean isConsuming, CancellationToken cancellationToken) at Npgsql.NpgsqlCommand.ExecuteReader(Boolean async, CommandBehavior behavior, CancellationToken cancellationToken) at Npgsql.NpgsqlCommand.ExecuteReader(Boolean async, CommandBehavior behavior, CancellationToken cancellationToken) at Npgsql.NpgsqlCommand.ExecuteReader(CommandBehavior behavior) at Npgsql.NpgsqlCommand.ExecuteDbDataReader(CommandBehavior behavior) at Dapper.SqlMapper.ExecuteReaderWithFlagsFallback(IDbCommand cmd, Boolean wasClosed, CommandBehavior behavior) in /_/Dapper/SqlMapper.cs:line 1185 at Dapper.SqlMapper.QueryImpl[T](IDbConnection cnn, CommandDefinition command, Type effectiveType)+MoveNext() in /_/Dapper/SqlMapper.cs:line 1213 at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source) at Dapper.SqlMapper.Query[T](IDbConnection cnn, String sql, Object param, IDbTransaction transaction, Boolean buffered, Nullable`1 commandTimeout, Nullable`1 commandType) in /_/Dapper/SqlMapper.cs:line 844 at NzbDrone.Core.ArtistStats.ArtistStatisticsRepository.Query(SqlBuilder builder, String template) in ./NzbDrone.Core/ArtistStats/ArtistStatisticsRepository.cs:line 62 at NzbDrone.Core.ArtistStats.ArtistStatisticsRepository.ArtistStatistics() in ./NzbDrone.Core/ArtistStats/ArtistStatisticsRepository.cs:line 32 at NzbDrone.Core.ArtistStats.ArtistStatisticsService.<ArtistStatistics>b__3_0() in ./NzbDrone.Core/ArtistStats/ArtistStatisticsService.cs:line 41 at NzbDrone.Common.Cache.Cached`1.Get(String key, Func`1 function, Nullable`1 lifeTime) in ./NzbDrone.Common/Cache/Cached.cs:line 98 at NzbDrone.Core.ArtistStats.ArtistStatisticsService.ArtistStatistics() in ./NzbDrone.Core/ArtistStats/ArtistStatisticsService.cs:line 41 at Lidarr.Api.V1.Artist.ArtistController.AllArtists(Nullable`1 mbId) in ./Lidarr.Api.V1/Artist/ArtistController.cs:line 136 at lambda_method47(Closure, Object, Object[]) at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncObjectResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync() at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync() --- End of stack trace from previous location --- at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync() --- End of stack trace from previous location --- at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) at Lidarr.Http.Middleware.BufferingMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/BufferingMiddleware.cs:line 27 at Lidarr.Http.Middleware.IfModifiedMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/IfModifiedMiddleware.cs:line 40 at Lidarr.Http.Middleware.CacheHeaderMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/CacheHeaderMiddleware.cs:line 32 at Lidarr.Http.Middleware.StartingUpMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/StartingUpMiddleware.cs:line 37 at Lidarr.Http.Middleware.UrlBaseMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/UrlBaseMiddleware.cs:line 28 at Lidarr.Http.Middleware.VersionMiddleware.InvokeAsync(HttpContext context) in ./Lidarr.Http/Middleware/VersionMiddleware.cs:line 28 at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.InvokeCore(HttpContext context) at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddlewareImpl.<Invoke>g__Awaited|10_0(ExceptionHandlerMiddlewareImpl middleware, HttpContext context, Task task) ``` ### Trace Logs have been provided as applicable. Reports may be closed if the required logs are not provided. - [x] I have read and followed the steps in the wiki link above and provided the required trace logs - the logs contain `trace` - that are relevant and show this issue.