How to fix Azure functions "inotify limit" error - azure

Question

I am trying to run a durable entity that I had described originally in this question. While trying to figure out that issue I have started getting the below error after a few runs.
The configured user limit (128) on the number of inotify instances has been reached, or the per-process limit on the number of open file descriptors has been reached.
Below is the full log of the error. Can someone point me to the possible cause and fix?
user:func1$ func start -p 8080
Found Python version 3.6.9 (python3).
Azure Functions Core Tools
Core Tools Version: 4.0.3971 Commit hash: d0775d487c93ebd49e9c1166d5c3c01f3c76eaaf (64-bit)
Function Runtime Version: 4.0.1.16815
Functions:
Entityfn: entityTrigger
KWhCalculator: activityTrigger
Orch: orchestrationTrigger
Starter: eventHubTrigger
For detailed output, run func with --verbose flag.
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
Request starting HTTP/2 POST http://127.0.0.1:44825/AzureFunctionsRpcMessages.FunctionRpc/EventStream application/grpc -
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
Executing endpoint 'gRPC - /AzureFunctionsRpcMessages.FunctionRpc/EventStream'
[2022-01-24T10:58:42.582Z] Worker process started and initialized.
[2022-01-24T10:58:47.753Z] Host lock lease acquired by instance ID '000000000000000000000000A845906C'.
[2022-01-24T10:58:47.833Z] A host error has occurred during startup operation '9803b89f-6cf1-4fe1-a482-075e770a9fea'.
[2022-01-24T10:58:47.833Z] System.IO.FileSystem.Watcher: The configured user limit (128) on the number of inotify instances has been reached, or the per-process limit on the number of open file descriptors has been reached.
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
Executed endpoint 'gRPC - /AzureFunctionsRpcMessages.FunctionRpc/EventStream'
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
Request finished HTTP/2 POST http://127.0.0.1:44825/AzureFunctionsRpcMessages.FunctionRpc/EventStream application/grpc - - 200 - application/grpc 5879.0529ms
info: Grpc.AspNetCore.Server.ServerCallHandler[14]
Error reading message.
System.IO.IOException: The request stream was aborted.
---> Microsoft.AspNetCore.Connections.ConnectionAbortedException: The HTTP/2 connection faulted.
--- End of inner exception stack trace ---
at System.IO.Pipelines.Pipe.GetReadResult(ReadResult& result)
at System.IO.Pipelines.Pipe.GetReadAsyncResult()
at System.IO.Pipelines.Pipe.DefaultPipeReader.GetResult(Int16 token)
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http2.Http2MessageBody.ReadAsync(CancellationToken cancellationToken)
at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource<TResult>.GetResult(Int16 token)
at Grpc.AspNetCore.Server.Internal.PipeExtensions.ReadStreamMessageAsync[T](PipeReader input, HttpContextServerCallContext serverCallContext, Func`2 deserializer, CancellationToken cancellationToken)
info: Microsoft.AspNetCore.Server.Kestrel[32]
Connection id "0HMEV51U1VS7R", Request id "0HMEV51U1VS7R:00000001": the application completed without reading the entire request body.
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
Request starting HTTP/2 POST http://127.0.0.1:44825/AzureFunctionsRpcMessages.FunctionRpc/EventStream application/grpc -
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
Executing endpoint 'gRPC - /AzureFunctionsRpcMessages.FunctionRpc/EventStream'
[2022-01-24T10:58:49.902Z] Worker process started and initialized.
[2022-01-24T10:58:55.521Z] Host lock lease acquired by instance ID '000000000000000000000000A845906C'.
[2022-01-24T10:58:55.578Z] A host error has occurred during startup operation '3b77fea3-afd0-427c-9d79-3175d7f0b815'.
[2022-01-24T10:58:55.578Z] System.IO.FileSystem.Watcher: The configured user limit (128) on the number of inotify instances has been reached, or the per-process limit on the number of open file descriptors has been reached.
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
Executed endpoint 'gRPC - /AzureFunctionsRpcMessages.FunctionRpc/EventStream'
info: Grpc.AspNetCore.Server.ServerCallHandler[14]
Error reading message.
System.IO.IOException: The request stream was aborted.
---> Microsoft.AspNetCore.Connections.ConnectionAbortedException: The HTTP/2 connection faulted.
--- End of inner exception stack trace ---
at System.IO.Pipelines.Pipe.GetReadResult(ReadResult& result)
at System.IO.Pipelines.Pipe.GetReadAsyncResult()
at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http2.Http2MessageBody.ReadAsync(CancellationToken cancellationToken)
at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource<TResult>.GetResult(Int16 token)
at Grpc.AspNetCore.Server.Internal.PipeExtensions.ReadStreamMessageAsync[T](PipeReader input, HttpContextServerCallContext serverCallContext, Func`2 deserializer, CancellationToken cancellationToken)
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
Request finished HTTP/2 POST http://127.0.0.1:44825/AzureFunctionsRpcMessages.FunctionRpc/EventStream application/grpc - - 200 - application/grpc 6153.6504ms
info: Microsoft.AspNetCore.Server.Kestrel[32]
Connection id "0HMEV51U1VS7S", Request id "0HMEV51U1VS7S:00000001": the application completed without reading the entire request body.
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
Request starting HTTP/2 POST http://127.0.0.1:44825/AzureFunctionsRpcMessages.FunctionRpc/EventStream application/grpc -
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
Executing endpoint 'gRPC - /AzureFunctionsRpcMessages.FunctionRpc/EventStream'

Answer 1

Restarting VS Code and creating a new Azure Function project did not help.
Fix: I restarted my system and the error is gone.
Cause: Not sure, but looks like long time running locally with long JSON messages might have opened lot of listeners on the port