ReeceStevens commented on issue #1093: Hanging or 500 errors during concurrent replication URL: https://github.com/apache/couchdb/issues/1093#issuecomment-360267053 @wohali I had initially been testing on a couchDB server under load when I used 10 threads. If you're using an otherwise-unloaded database, you can up the thread count to generate the error. `--threads 40 --single-source` definitely did the trick every time for me, even on an unloaded database. 40 threads is obviously a bit overkill, but this issue seems to be a race condition and occurs inconsistently. To get it to trigger every time, I had to lean in on the database pretty hard. If you set `update_lru_on_read = false`, it should happen very quickly, probably in under 10 iterations.
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