Hi @zoltan.zvara, based on analysis of logs we are seeing some in-memory corruption to the actual index data as its stored in forestdb, this is only an in-memory corruption and there is no on-disk corruption observed also no corruption into index metadata has been observed. We still do not know the RCA of corruption. We are looking into few possibilities such as possibility of OOMs affecting memory allocation on forestdb and if that can lead to these issues, adding some instrumentation into code etc. Meanwhile is it possible for you try out Enterprise Edition (EE)? some advantages of trying out EE would be - it uses different storage engine plasma, will allow support for replicas and you can actively engage with couchbase support. So I would suggest looking into evaluating Enterprise Edition and see if that suits your needs better.