[BUG][JAVA] Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

[simenandre]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?

Description

Trying to generate a quite large ~1mb Swagger-file. It had some validation issues, and I tried to fix them. Don't know if those are relevant, since no matter if it's fixed or not, no dice. Still «Java heap space» issue.

Relevant issue: bjerkio/tripletexjs#14
Reproduce the issue with this repository: https://github.com/bjerkio/tripletexjs/tree/reproduce

openapi-generator version

4.3.1

OpenAPI declaration file content or url

https://raw.githubusercontent.com/bjerkio/tripletexjs/reproduce/swagger-fixed.json

Command line used for generation

make generate or

java -Xmx4G -jar openapi-generator-cli.jar \
	generate \
	-i ./swagger-fixed.json \
	-g typescript-fetch \
	-o ./out -v

Steps to reproduce

> git clone git@github.com:bjerkio/tripletexjs.git
> git checkout reproduce
> make generate

Related issues/PRs

• [BUG] [JavaScript] java.lang.OutOfMemoryError on simple OpenAPI file #2503
• [BUG] Large spec results in java/lang/OutOfMemoryError #4398
• [BUG][typescript-node] Large spec client results in java.lang.OutOfMemoryError #5201.

Suggest a fix

I'm lost.

@bbdouglas @sreeshas @jfiala @lukoyanov @cbornet @jeff9finger @karismann @Zomzog @lwlee2608 @bkabrda

[simenandre]

Any updates on this?

[jtrueblood-anaqua]

Hey cobraz,

We are experiencing the same issue. I'm going to gather info an post in a few.

Thanks,
Jeff

[simenandre]

@jtrueblood-anaqua Did you get some info to post?

[simenandre]

Bump ❤️

[simenandre]

Closing this. We have moved away from this library.

[davija]

Can we please re-open this? The issue still exists and should be fixed without respect to the original poster using this library or not.

[davija]

FYI, one thing I found to get around this was:

• Use a 64-bit JDK/JRE
• Set an environment variable for JAVA_OPTS="-Xmx4g"
  • (or some other amount of memory... starting at 2g and incrementing until you can get one to finish)

[simenandre]

@agilob @davija reopened. Hope we'll get this fixed :)

re
@bbdouglas @sreeshas @jfiala @lukoyanov @cbornet @jeff9finger @karismann @Zomzog @lwlee2608 @bkabrda

[agilob]

I will be slowly looking into it step after step, trying to pick low hanging fruits first, one PR is ready #8181 reduces number of open files, closes resources much sooner. Should help, but I didn't do any professional profiling for it.

[wing328]

I've filed #8731 to workaround the issue for the time being.