throng | A simple worker-manager for clustered Node.js apps | Runtime Evironment library

Here is a solution using the xml2 package. Assuming that your XML file is saved to the path ~/Desktop/New Yorker/1925_02_21/xml/page0000004.xml:

The problem lies somewhere in mongoose compatibility with throng.

It fires new "connect" event for each "thread" and you delete the document on connect https://gist.github.com/wootwoot1234/49cb7d082850d93f8cd03da164644cfb#file-index-js-L100:

Simply move the send call in the correct position as follows:

After some weeks without further research, I've been suggested to try with npm instead of yarn. So I've tried and the whole thing was running normally again.

The problem was in the lock file: after deleting it, even back with yarn, the problem was fixed.

So if you're in this situation, try to delete node_modules folder and lock file and then re-run yarn or npm install. This should do the trick.

Parse Community forum: https://community.parseplatform.org/t/parse-4-2-startup-error-must-provide-source-received-undefined/278/11

Thanks to Parse core contributor davimacedo to helping me to solve that issue!

You mixed up the return type of oClient.GetInitiatorsList(userID), it returns ALM_WKFLW_TYPE_M[] and not INITIATORS_LIST[].

So you WebMethod should look like this:

To assign role to user successfully in the runbook, follow the steps below.

Note : The New-AzureRmRoleAssignment you used belongs to the old AzureRM, it was deprecated and will not be updated anymore. In my sample, I use the new Az command New-AzRoleAssignment, I also recommend you to use it.

1.Navigate to the subscription in the portal(you need to be Owner/User Access Administrator in the subscription) -> add the service principal of your automation RunAs account as an Owner/User Access Administrator(by default it will be added as Contributor when it was created, but Contributor have no permission to run New-AzRoleAssignment).

2.Navigate to the Azure Active Directory in the portal -> App registrations -> find the AD App of your RunAs Account and add the Directory.Read.All application permission in Azure Active Directory Graph(Not Microsoft Graph) like below, don't forget to click the Grant admin consent for xxx button at last(you need to be the admin role in your AAD tenant). The permission may take about 30 min to take effect.

3.Navigate to the automation account in the portal -> Modules -> make sure you have installed the Az.Accounts, Az.Resources modules, if not, go to Browse Gallery, search for the names, and install them.

4.Then in the runbook, use the script below, it works fine on my side. In my sample, I add the user as a Reader in the resource group joyRG, you can change it, it depends on your requirement.

Your example shows the use of the throng module. Looking at its code, it uses the nodejs cluster module. I can offer some explanation both in terms of the built-in nodejs cluster module (which should apply to thong) or in terms or the built-in worker_threads module.

cluster module

The cluster module starts completely separate processes. They don't share any memory or any variables, though they are configured so they can send socket handles from one process to another or they can send variables to each other which will be copied. If you define constants in your cluster startup code, those same constants will be used in each cluster (just because they each run the same startup code and thus each initialize themselves the same). But, if you have a global or a module level variable that you intend to change, whatever change you make will be entirely local to that process and not reflected in the others.

worker_thread module

The worker_thread module lets you start one or more threads in the same process. Each thread is its own V8 interpreter and they don't, by default, share any variables or memory (global or module). Variables that you pass between the main thread and a worker thread, either via workerData or via postMessage() are copied to be separate variables in the receiving thread. Objects are copied with a structured cloning process.

But, they are in the same process so doing something like calling process.exit() from a worker thread will exit the entire process (you can separately kill just the thread if you want).

Worker threads can share memory by allocating memory as a SharedArrayBuffer which then the main thread and all workers can all access. There is no automatic synchronization of access to that memory so expected multi-threading concurrency issues can occur unless you either use some of the synchronization primitives that nodejs now offers or unless you have a design such that only one thread at a time ever has a reference to that shared memory (that's what I've been doing in my recent app - passing a sharedArrayBuffer to a specific worker for it to carry out an operation on and then it passes it back when it's done with the job and the main thread does not keep a reference to it while the worker is working on it).

Memory shared in this way isn't a set of variables, it's a buffer of memory, but you can interpret the memory however you want to make it into specific meaningful variables.

Note that shared memory isn't automatically available to every thread, but instead you have to pass it to the thread, either in the initial workerData or using postMessage() before it gets a reference to it. sharedMemory is literally allocated from a different heap. I believe it was first developed by V8 for use with webWorkers in the browser, but works now in node.js too.