Asias He

> The direction @yarongilor is checking at the moment is the fact that this keyspace was created when the cluster was in mixed mode (2 nodes upgraded, 2 haven't). @asias...

I could not produce with scylla-bench ``` start n1,n2,n3 run scylla-bench upgrade n3 run scylla-bench in the background run repair scylla-bench on n3 ``` stress_before_upgrade: scylla-bench -workload=sequential -mode=write -replication-factor=3 -partition-count=800...

> > I could not produce with scylla-bench > > ``` > > start n1,n2,n3 > > run scylla-bench > > upgrade n3 > > run scylla-bench in the background...

*) n7 finished reboot at: 2022-09-07T18:27:42 ``` 2022-09-07T18:27:42+00:00 longevity-mv-si-4d-2022-2-db-node-371f29c2-7 !INFO | scylla[993]: [shard 0] init - Scylla version 2022.2.0~rc1-0.20220902.a9bc6d191031 initialization completed. ``` *) n7 started to rebuild at 2022-09-07T18:27:50 ```...

Did the same test (interrupt decommission + rebuild) reproduce with 5.1 release?

> According to the original description, it happened on 2022.2.0~rc1-20220902.a9bc6d191031 which is equivalent 5.1 Yes, but do we see the test failed during the 5.1 release tests? The log showed...

Some comments below: 0) Let's add more background and motivation to the cover letter. ``` Why do we want to introduce the task module for repair? What are the benefits?...

> If repair is a module of task manager then users can easily check which repairs and node operations are currently running or finished, what is their progress and status....

Unrelated change in this PR: $ git diff f673d0abbe752c1f7b48130e638c737c5f16c8bf --stat|grep abseil abseil | 2 +-

> > What if a node in some region (or the entire region) is down? We may need to add a new node in our region, but now we can't,...