Distributed table deleting partition - clickhouse

Question

I have created replicated merge tree table as below:
CREATE TABLE probe.a on cluster dwh (
instime UInt64,
psn UInt64
) ENGINE = ReplicatedMergeTree('/clickhouse/tables/{shard}/probe/a', '{replica}') PARTITION BY instime ORDER BY (psn);
Then I created a distributed table as :
CREATE TABLE probe.a_distributed on cluster dwh (
instime UInt64,
psn UInt64
) ENGINE = Distributed(dwh,probe, a, rand());
I have then added macro in each server:
Server 1
<yandex>
<macros replace="true">
<shard>1</shard>
<replica>server1.com</replica>
</macros>
</yandex>
Server 2
<yandex>
<macros replace="true">
<shard>2</shard>
<replica>server2.com</replica>
</macros>
</yandex>
Remote Servers:
<dwh>
<!-- shard 01 -->
<shard>
<replica>
<host>server1.com</host>
<port>9000</port>
<user>default</user>
<password>test12pwd</password>
</replica>
</shard>
<!-- shard 02 -->
<shard>
<replica>
<host>server2.com</host>
<port>9000</port>
<user>default</user>
<password>test12pwd</password>
</replica>
</shard>
</dwh>
I have two issues when dropping partition:
When I drop partition using a distributed table
ALTER TABLE probe.a on cluster dwh DROP PARTITION '2020-03-13';
I get error:
DB::Exception: Table 'a' is replicated, but shard #4 isn't replicated
according to its cluster definition. Possibly
true is forgotten in the
cluster config. (version 19.16.14.65) (version 19.16.14.65)
Dropped partition individually but distributed table is showing half of the row still but when I check locally there is no row
How can this issue with distributed table be resolved for data sharded without replication?

Answer 1

you use Replicated tables. You MUST mark your shards with <internal_replication>true</internal_replication>.
<dwh>
<!-- shard 01 -->
<shard>
<internal_replication>true</internal_replication>
<replica>
<host>server1.com</host>
<port>9000</port>
<user>default</user>
<password>test12pwd</password>
</replica>
</shard>
<!-- shard 02 -->
<shard>
<internal_replication>true</internal_replication>
<replica>
<host>server2.com</host>
<port>9000</port>
<user>default</user>
<password>test12pwd</password>
</replica>
</shard>
</dwh>