Marcel Reutegger created OAK-1732:
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Summary: Cluster node lease not renewed in time
Key: OAK-1732
URL: https://issues.apache.org/jira/browse/OAK-1732
Project: Jackrabbit Oak
Issue Type: Bug
Components: core, mongomk
Affects Versions: 0.20.0
Reporter: Marcel Reutegger
Assignee: Marcel Reutegger
Priority: Blocker
Fix For: 1.1
A cluster node lease is renewed periodically to indicate that a given clusterId
is in use. This happens twice the async delay before the lease expires. With
the default configuration this means the lease is renewed two seconds before it
expires. Load test with an oak cluster shows that the lease sometimes is not
renewed in time and the LastRevRecoveryAgent kicks in even though the cluster
nodes are still running.
I see a couple of options to fix this:
- Renew the lease earlier. E.g. after half of the lease timeout, or even with
every background operation run. This would be roughly once a second.
- Decouple the lease renew from the background operation thread where also more
expensive operations are executed (_lastRev updates and cache invalidation).
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