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77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
import pytest
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from helpers.cluster import ClickHouseCluster
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cluster = ClickHouseCluster(__file__)
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node1 = cluster.add_instance(
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"node1",
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main_configs=["configs/remote_servers.xml"],
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with_zookeeper=True,
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stay_alive=True,
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)
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@pytest.fixture(scope="module")
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def started_cluster():
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try:
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cluster.start()
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yield cluster
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finally:
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cluster.shutdown()
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def test_ddl_queue_delete_add_replica(started_cluster):
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# Some query started on the cluster, then we deleted some unfinished node
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# and added a new node to the cluster. Considering that there are less
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# finished nodes than expected and we can't resolve deleted node's hostname
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# the queue will be stuck on a new node.
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# <host_name> inside <distributed_ddl> allows us to simply discard deleted
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# node's hostname by simple comparison without trying to resolve it.
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node1.query(
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"create table hostname_change on cluster test_cluster (n int) engine=Log"
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)
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# There's no easy way to change hostname of a container, so let's update values in zk
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query_znode = node1.query(
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"select max(name) from system.zookeeper where path='/clickhouse/task_queue/ddl'"
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)[:-1]
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value = (
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node1.query(
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f"select value from system.zookeeper where path='/clickhouse/task_queue/ddl' and name='{query_znode}' format TSVRaw"
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)[:-1]
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.replace(
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"hosts: ['node1:9000']", "hosts: ['finished_node:9000','deleted_node:9000']"
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)
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.replace("initiator: node1:9000", "initiator: finished_node:9000")
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.replace("\\'", "#")
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.replace("'", "\\'")
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.replace("\n", "\\n")
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.replace("#", "\\'")
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)
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finished_znode = node1.query(
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f"select name from system.zookeeper where path='/clickhouse/task_queue/ddl/{query_znode}/finished' and name like '%node1%'"
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)[:-1]
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node1.query(
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f"insert into system.zookeeper (name, path, value) values ('{query_znode}', '/clickhouse/task_queue/ddl', '{value}')"
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)
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started_cluster.get_kazoo_client("zoo1").delete(
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f"/clickhouse/task_queue/ddl/{query_znode}/finished/{finished_znode}"
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)
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finished_znode = finished_znode.replace("node1", "finished_node")
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node1.query(
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f"insert into system.zookeeper (name, path, value) values ('{finished_znode}', '/clickhouse/task_queue/ddl/{query_znode}/finished', '0\\n')"
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)
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node1.restart_clickhouse(kill=True)
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node1.query(
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"create table hostname_change2 on cluster test_cluster (n int) engine=Log"
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)
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