Azure Function Error: Azure function is not reachable

Question

I have a function app deployed in Azure but it shows the host is offline error:
Full Exception :
System.IO.IOException : The network path was not found. : 'C:\home\site\wwwroot\host.json'
at System.IO.FileStream.ValidateFileHandle(SafeFileHandle fileHandle)
at System.IO.FileStream.CreateFileOpenHandle(FileMode mode,FileShare share,FileOptions options)
at System.IO.FileStream..ctor(String path,FileMode mode,FileAccess access,FileShare share,Int32 bufferSize,FileOptions options)
at System.IO.StreamReader.ValidateArgsAndOpenPath(String path,Encoding encoding,Int32 bufferSize)
at System.IO.StreamReader..ctor(String path,Encoding encoding,Boolean detectEncodingFromByteOrderMarks)
at System.IO.File.InternalReadAllText(String path,Encoding encoding)
at System.IO.File.ReadAllText(String path)
at Microsoft.Azure.WebJobs.Script.Configuration.HostJsonFileConfigurationSource.HostJsonFileConfigurationProvider.LoadHostConfig(String configFilePath) at D:\a_work\1\s\src\WebJobs.Script\Config\HostJsonFileConfigurationSource.cs : 201
at Microsoft.Azure.WebJobs.Script.Configuration.HostJsonFileConfigurationSource.HostJsonFileConfigurationProvider.LoadHostConfigurationFile() at D:\a_work\1\s\src\WebJobs.Script\Config\HostJsonFileConfigurationSource.cs : 146
at Microsoft.Azure.WebJobs.Script.Configuration.HostJsonFileConfigurationSource.HostJsonFileConfigurationProvider.Load() at D:\a_work\1\s\src\WebJobs.Script\Config\HostJsonFileConfigurationSource.cs : 72
at Microsoft.Extensions.Configuration.ConfigurationRoot..ctor(IList`1 providers)
at Microsoft.Extensions.Configuration.ConfigurationBuilder.Build()
at Microsoft.Azure.WebJobs.Script.ScriptHostBuilderExtensions.<>c__DisplayClass6_0.b__2(HostBuilderContext context,IConfigurationBuilder configBuilder) at D:\a_work\1\s\src\WebJobs.Script\ScriptHostBuilderExtensions.cs : 112
at Microsoft.Extensions.Hosting.HostBuilder.BuildAppConfiguration()
at Microsoft.Extensions.Hosting.HostBuilder.Build()
at Microsoft.Azure.WebJobs.Script.WebHost.DefaultScriptHostBuilder.BuildHost(Boolean skipHostStartup,Boolean skipHostConfigurationParsing) at D:\a_work\1\s\src\WebJobs.Script.WebHost\DefaultScriptHostBuilder.cs : 59
at async Microsoft.Azure.WebJobs.Script.WebHost.WebJobsScriptHostService.UnsynchronizedStartHostAsync(ScriptHostStartupOperation activeOperation,Int32 attemptCount,JobHostStartupMode startupMode) at D:\a_work\1\s\src\WebJobs.Script.WebHost\WebJobsScriptHostService.cs : 277

Could you please help

Answer 1

@sonal khatri Thanks for reaching out.

As per the error The network path was not found. looks like your storage account associated with the function app is not reachable. This is because the storage account and function app have network restrictions, please make sure the network configuration is properly configured. In case it is under the VNET make sure it is configured correctly. For more details on configure please refer to Azure Functions with a virtual network document.