comm | S4 Communication Layer | Runtime Evironment library

I have a problem with my POST on ASP.NET . Basically the when I try to POST a new User, I get the status: "400 Bad Request" on Postman, but the User is being created! The error message is: "Value cannot be null.\r\nParameter name: uriString" . Can someone tell my why it happenes?

My code is:

Controller:

I have a C++ class which I intend to call from python's mpi4py interface such that each node spawns the class. On the C++ side, I'm using the Open MPI library (installed via homebrew) and pybind11.

The C++ class is as follows:

I am following the code found on the accepted answer to this SO question (the "Chunk then scatter" part) and I get a strange error while trying to scatter a pandas.DataFrame to the workers.

I am working in jupyter notebook if that matters.

I am not sure what this error means, it's quite cryptic, so any help would be greatly appreciated.

Suppose you have two collections (Vec for simplicity here) of instances of T, and a function to compute whether the elements in those collections appear in either or both of them:

I want my TCP client to connect to multiple servers(each server has a separate IP and port).
I am using async_connect. I can successfully connect to different servers but the read/write fails since the server's corresponding tcp::socket object is not available.
Can you please suggest how I could store each server's socket in some data structure? I tried saving the IP, socket to a std::map, but the first server's socket object is not available in memory and the app crashes.
I tried making the socket static, but it does not help either.

Please help me!!

Also, I hope I am logically correct in making a single TCP client connect to 2 different servers. I am sharing below the simplified header & cpp file.

I tried to start Apache2 service using 'sudo service' command and it works, but when I tried to use ansible service module to start the apache2, I got the error message saying "Service is in unknown state".

I do upgraded my ansible to the latest version. I am working in WSL Ubuntu 20.04.3LTS. And I do have set up the SSH correctly so that i can run other ansible ad-hoc command using modules like apt, command and shell, etc.

Any clue where the problem may be?

After digging a little further, I found that seems like ansible has a bug in service_mgr.py at the method 'is_systemd_managed_offline(module), which makes ansible think the service manager is systemd while it is actually service (or sysv init):

I am learning Linux programing.
When I trying to write a simple module to get family of a process, I find I can not get current pid of a process and its parent process. How to fix it?
Here is a part of my code.

I am trying to use Address Sanitizer, but the kernel keeps killing my process due to excessive memory usage. Without Address Sanitizer the process runs just fine.

The program is compiled for arm-v7a using gcc-8.2.1 with

I'd like to compare the output of one program on two files. It would be something like:

comm -23 <(cat a/somefile) <(cat b/somefile)

Where cat is a stand in for a monster of a command.

Here's what I know. If I do echo {a,b}/somefile then I get

a/somefile b/somefile

which is correct.

I tried to apply this "explosion" to the process substitution: comm -23 <(cat {a,b}/somefile) needless to say I got an error comm: missing operand after ‘/proc/self/fd/16’. Is this possible to do?