Random crashes

[dhoerl-lp]

New Issue Checklist

• [ x] I am not disclosing a vulnerability.
• [x ] I am not just asking a question.
• [x ] I have searched through existing issues.
• [ x] I can reproduce the issue with the latest versions of Parse Server and the Parse ObjC SDK.

Issue Description

Random crashes always in the same place:

- (void)runContinuations {
    @synchronized(self.lock) {
        [self.condition lock];
        [self.condition broadcast]; <- CRASHES
        [self.condition unlock];
        for (void (^callback)(void) in self.callbacks) {
            callback();
        }
        [self.callbacks removeAllObjects];
    }

Steps to reproduce

Unfortunately no reproducible way. I have a script I developed to retrieve a slew of data from each office of a client. It would run 10 minutes and continually PFQuery for data. It will reliable crash at some random point, usually 5 min in.

Actual Outcome

Random crashes. It's always in the same spot as shown above. I thought it was due to the high load of my download script, but I got it the yesterday when there was very light Parse usage.

I believe I have seen this same crash in the past, but it was very infrequent. It's getting more frequent.

If there is some logging I can enable, or you have some suggestions on how to better understand the conditions, I could possible swizzle that method to log something.

Expected Outcome

No crashes.

Environment

iOS 18.2 (latest), Xcode Simulator 16.2

Client

• Parse ObjC SDK version: 4.2.0 Package

Server

• Parse Server version: N/A
• Operating system: macOS 15.1.1 Apple M3 Silicon
• Local or remote host (AWS, Azure, Google Cloud, Heroku, Digital Ocean, etc): AWS

Database

• System (MongoDB or Postgres): Mongo
• Database version: Unknown
• Local or remote host (MongoDB Atlas, mLab, AWS, Azure, Google Cloud, etc): AWS

Logs

Will update next crash.

[parse-github-assistant]

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