Fix distributed_ddl replicas_path mismatch causing ON CLUSTER DDL to hang#1922
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sunsingerus merged 1 commit intoAltinity:0.26.0from Feb 13, 2026
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…hang
The operator generates a custom <distributed_ddl><path> per CHI
(e.g. /clickhouse/{chi-name}/task_queue/ddl) but does not set
<replicas_path>. ClickHouse 25.8+ falls back to the default
replicas_path from config.xml (/clickhouse/task_queue/replicas),
which is in a different subtree. This causes the DDL workers to
never pick up tasks, making any CREATE TABLE ... ON CLUSTER hang
indefinitely.
Add <replicas_path> alongside <path> so both use the same
per-CHI subtree in ZooKeeper/Keeper.
Member
|
It should be only applied for versions >= 25.8.10 to avoid unnecessary restarts. Maybe we can do it via addons.rules configuration instead of the code. Like this: |
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The operator generates a custom <distributed_ddl> per CHI (e.g. /clickhouse/{chi-name}/task_queue/ddl) but does not set <replicas_path>. ClickHouse 25.8+ falls back to the default replicas_path from config.xml (/clickhouse/task_queue/replicas), which is in a different subtree. This causes the DDL workers to never pick up tasks, making any CREATE TABLE ... ON CLUSTER hang indefinitely.
Add <replicas_path> alongside so both use the same per-CHI subtree in ZooKeeper/Keeper.
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