ruojieranyishen opened a new issue, #2379:
URL: https://github.com/apache/incubator-pegasus/issues/2379
## Feature Request
**Is your feature request related to a problem? Please describe:**
For some tables with duplication enabled, blocking non-idempotent writes is
not strictly required in production.
Duplication does not support non-idempotent write operations (INCR,
CHECK_AND_SET, CHECK_AND_MUTATE)
In `mutation_batch::add_mutation_if_valid`, all non-idempotent writes are
skipped:
```
if (!task_spec::get(update.code)->rpc_request_is_write_idempotent) {
continue;
}
```
In replica::need_reject_non_idempotent, non-idempotent writes are rejected:
```
return !spec->rpc_request_is_write_idempotent;
```
**Describe the feature you'd like:**
Support Duplication to send non-idempotent write operations (INCR,
CHECK_AND_SET, CHECK_AND_MUTATE).
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