Potential race condition with insert-wait-get

[blind-oracle]

Potential race condition with insert-wait-get

[al8n]

Hi, I failed to reproduce it on my machine, but this may be because the current implementation will first push new entry to a write buffer and then add it to the map (if the write buffer is full, then some inserts will be directly dropped). Can you give me your test code to help me reproduce the problem?

[blind-oracle]

@al8n Thanks for the effort. Probably my code won't help as I can't reproduce it too when running locally and not in Bazel. It's hard for me to tell how these environments are different, should be the same (and we have thousands of other tests which run fine). But there should be some subtle difference that causes this...

Effectively I'm doing the simple thing that I wrote initially - insert the value with some key, then immediately (well, after wait) check if it's there. And this sometimes gives me a cache miss. When the value is inserted the cache is empty, just created, so it shouldn't be dropped.

Maybe there's some initialization phase after the Cache object is created using CacheBuilder.finalize() (threads are spawned etc)? Though it does not explain why it does not fail locally.

I've switched the cache now to use async API of stretto, will check if that will cause same issues...