sweeper | orphaned AWS services running that cost money | Serverless library

I am using ansible to install mongodb in an automated way. This works without problems from on a normal server. However, I now want to install mongodb in a Docker container running centos.

The installation itself works but I can't start the mongodb inside the docker container.

output if the command "service mongod status" is following:

Consider the following article from the JLS (§15.13.1)

A method reference expression ending with Identifier is exact if it satisfies all of the following:

• If the method reference expression has the form ReferenceType ::[TypeArguments] Identifier, then ReferenceType does not denote a raw type.
• The type to search has exactly one member method with the name Identifier that is accessible to the class or interface in which the method reference expression appears.
• This method is not variable arity (§8.4.1).
• If this method is generic (§8.4.4), then the method reference expression provides TypeArguments.

Consider the following code snippet:

I've a document based macOS, that's using a NSDocument based subclass.

For writing the document's file I need to implement data(ofType:) -> Data which should return the document's data to be stored on disk. This is (of course) a synchronous function.

My data model is an actor with a function that returns a Data representation.

The problem is now that I need to await this function, but data(ofType:) wants the data synchronously.

How can I force-wait (block the main thread) until the actor has done its work and get the data?

EDIT: In light of Sweepers remark that this might be an XY-problem I tried making the model a @MainActor, so the document can access the properties directly. This however doesn't allow me to create the model in the first place:

I have a use case where I need to create a map mapping from KClass to a (lambda) function that converts instances of that class to something else (in my case a String). In java, I would write something along the lines of this:

service mongod start is not working

I would like to instantiate a (non-generic) class in C# (ClassToBeInstantiated) that has a public non-parameterless constructor via LINQ Expression.New inside an Expression.Block.

see update below, based on answer from @sweeper

According to the documentation, the only overloads for Expression.New that do accept arguments require a ConstructorInfo argument. As I do not have access to that info beforehand, but have to retrieve this inside the Expression.Block. So I am able to use an Expression.Call on the type ClassToBeInstantiated that is passed into the block.

However, all Expression.New overloads only accept either ConstructorInfo as an argument or for an instantiation if I want to pass arguments to the constructor. Type is only available for using a parameterless constructor.

I cannot use a ParameterExpression holding a ConstructorInfo either.

So my question: is there a way around this with Expression.New? I know I can use ConstructorInfo.Invoke via another Expression.Call. But this seems akward to me, as -at least in my opinion- the Expression.New API should exactly do this for me.

Am I missing something?

Thanks for your help, comments and reply.

Here is some additional information to further illustrate the case:

I work on a generic XSL to standardize different nested JSON. My sample JSONs

/soccer2.json

Say we have a dataframe like this and want to remove columns when certain conditions met.

So I'm using Hydra 1.1 and hydra-ax-sweeper==1.1.5 to manage my configuration, and run some hyper-parameter optimization on minerl environment. For this purpose, I load a lot of data in to memory (peak around 50Gb while loading with multiprocessing, drops to 30Gb after fully loaded) with multiprocessing (by pytorch).

On a normal run this is not a problem (My machine have 90+Gb RAM), one training finish without any issue.

However, when I run the same code with -m option (and hydra/sweeper: ax in config), the code stops after about 2-3 sweeper runs, getting stuck at the data loading phase, because all memories of the system (+swap memory) is occupied.

First I thought this was some issue with minerl environment code, which starts java-code in sub-process. So I tried to run my code without the environment (only the 30Gb data), and I still have the same issue. So I suspect I have some memory-leak inbetween the Hydra sweeper.

So my question is, How does Hydra sweeper(or ax-sweeper) work in-between sweeps? I always had the impression that it runs the main(cfg: DictConfig) decorated with @hydra.main(...), takes a scalar return(score) and run the Bayesian optimizer with this score, with main() called similar to a function (everything inside being properly deallocated/garbage collected between each sweep-run).

Is this not the case? Should I then load the data somewhere outside the main() and keep it between sweeps?

Thank you very much in advance!