Retry disconnects and expired sessions when reading system.zookeeper

[davenger]

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• Improvement

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Retry disconnects and expired sessions when reading system.zookeeper. This is helpful when reading many rows from system.zookeeper table especially in the presence of fault-injected disconnects.

[robot-ch-test-poll3]

This is an automated comment for commit 6e82dc8 with description of existing statuses. It's updated for the latest CI running

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[Algunenano]

Why isn't this using ZooKeeperRetriesControl? It's better to adapt that if we need to rather than re-implement retries

[davenger]

Ok
Do you think we should move ZooKeeperRetriesControl from Storages/MergeTree to Common?

[Algunenano]

Absolutely. Ideally we should be using ZooKeeperRetriesControl + ZooKeeperWithFaultInjectionPtr everywhere so we handle both injections and retries.

[Algunenano]

Let's use the whole pack:

• Use insert_keeper_max_retries and similar for settings. I hope we will unify it with backup_restore_keeper_max_retries and have a single common setting for retries at some point, so we shouldn't add a new one.
• Use ZooKeeperWithFaultInjection and refresh it in the loop if necessary.

[davenger]

Integration tests (tsan) #59415