Need help investigating errors on closing pebble DB

[andrasbeni]

In one of my tests, sometimes I get the following errors when I close the DB:

• leaked iterators or
• leaked memtable reservation

I was able to reproduce this with versions v0.0.0-20221104214247-8dc60b62ebbf and v0.0.0-20230307175142-1c38c4cb89d4.
I tied to figure out if there's an Iterator that I did not Close(), but have not found any. The second error is even more confusing to me.
How can I find what I'm doing wrong?

[jbowens]

Both errors are likely caused by leaking an Iterator. Unfortunately, we don't have any facilities to help debug this. #1597 would help, but we've never implemented it. I'd recommend instrumenting your code to track all your iterator opens and closes.

[andrasbeni]

Thanks

[andrasbeni]

The issue was I caused by a simple Get operation: we did not close the Closer object in case of an unmarshalling error.
I hope this helps someone.