Service bus trigger function throws timeout exceptions

Question

Full Exception :
 Microsoft.Azure.WebJobs.Host.FunctionTimeoutException 
 /Timeout value of 00:05:00 was exceeded by function
 /PortfolioAumBuilderOnQueue    
async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.TryHandleTimeoutAsync(Task invokeTask,CancellationToken shutdownToken,Boolean throwOnTimeout,CancellationToken timeoutToken,TimeSpan timeoutInterval,IFunctionInstance instance,Action onTimeout) 
D:\a\_work\1\s\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs 
 /663    
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    
async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.InvokeWithTimeoutAsync(IFunctionInvoker invoker,ParameterHelper parameterHelper,CancellationTokenSource timeoutTokenSource,CancellationTokenSource functionCancellationTokenSource,Boolean throwOnTimeout,TimeSpan timerInterval,IFunctionInstance instance) 
D:\a\_work\1\s\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs 
 /571    
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    
async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithWatchersAsync(IFunctionInstanceEx instance,ParameterHelper parameterHelper,ILogger logger,CancellationTokenSource functionCancellationTokenSource) 
D:\a\_work\1\s\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs 
 /527    
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    
async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(IFunctionInstanceEx instance,FunctionStartedMessage message,FunctionInstanceLogEntry instanceLogEntry,ParameterHelper parameterHelper,ILogger logger,CancellationToken cancellationToken) 
D:\a\_work\1\s\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs 
 /306    
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    
async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(IFunctionInstanceEx instance,FunctionStartedMessage message,FunctionInstanceLogEntry instanceLogEntry,ParameterHelper parameterHelper,ILogger logger,CancellationToken cancellationToken) 
D:\a\_work\1\s\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs 
 /352    
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    
async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.TryExecuteAsync(IFunctionInstance functionInstance,CancellationToken cancellationToken) 
D:\a\_work\1\s\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs 
 /108