[ARIES-1732] blueprint-cm - race condition

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: Blueprint
• Flags: Patch
• External issue URL: https://issues.jboss.org/browse/ENTESB-7141
• External issue ID: ENTESB-7141
• Assignee: Grzegorz Grzybek
• Reporter: Paolo Antinori
• Created: 28/Jul/17 13:25
• Updated: 19/Dec/19 17:36
• Resolved: 06/Sep/17 09:06

Description

There is a possible race condition in `org.apache.aries.blueprint.compendium.cm.CmPropertyPlaceholder` and `org.apache.aries.blueprint.compendium.cm.ManagedObjectManager`

There are situations where `ConfigAdmin` service might not be available and returns `null` when queried for the initial `config`.
In other cases instead, `CmPropertyPlaceholder` receives updates from `ConfigAdmin` thread even before it has completed it's initialization.

The code doesn't discriminate if `config` is `null` or not, and treats any value as valid, marking `CmPropertyPlaceholder` instance as initialized.

This leads to spotty errors.

The suggested fix, that simply prevents that `update(null)` invocation mark the `CmPropertyPlaceholder` instance as initialized, addresses the issue.

Code here:
https://github.com/apache/aries/compare/trunk...paoloantinori:ENTESB-7141?expand=1

Issue Links

• relates to: ARIES-1578 blueprint-cm doesn't support org.osgi.service.cm.ConfigurationPlugin