[OAK-7610] Active blob deletion fails on composite setups

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.9.5
• Fix Version/s: 1.10.0, 1.9.6
• Component/s: composite, indexing, lucene
• Assignee: Vikas Saurabh
• Reporter: Paul Chibulcuteanu
• Created: 05/Jul/18 07:39
• Updated: 08/Oct/19 15:21
• Resolved: 05/Jul/18 22:05

Description

Because there are two CheckpointManager MBeans present on the composite nodestore setup, active blob deletion fails with the following message:

Unable to get checkpoint mbean. Multiple services of required type found.

The two Mbeans:

Composite node store checkpoint management (CheckpointManager)
Document node store checkpoint management (CheckpointManager)

Following condition is not satisfied on this setup:

            if (services.size() == 1) {
                return services.get(0).getOldestCheckpointCreationTimestamp();

https://github.com/apache/jackrabbit-oak/blob/5ef49f07ea244907dc1f4458ebee269f0437d934/oak-lucene/src/main/java/org/apache/jackrabbit/oak/plugins/index/lucene/ActiveDeletedBlobCollectorMBeanImpl.java#L327-L330

Issue Links

• is related to: OAK-7699 Active blob deletion fails on composite setups (follow up of OAK-7610)
• is related to: OAK-7700 Formalize how singleton pattern should be handled (e.g. in composite node store setup)
• relates to: OAK-6315 Create CheckpointMBean implementation for the composite node store
• relates to: OAK-6582 Review MBean interactions in a composite setup