[SLING-6522] Refactor/Improve error handling of InstallTasks

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Installer Core 3.8.0
• Component/s: Installer
• Assignee: Konrad Windszus
• Reporter: Konrad Windszus
• Created: 15/Feb/17 14:04
• Updated: 19/Feb/19 12:08

Description

Currently the retry behaviour and exception handling needs to be done in each InstallTask individually. It would be good to have a global handling in the OSGi Installer, which could be easily triggered from the individual transformers.
The desired approach is outlined in http://www.mail-archive.com/[e-mail]/msg60947.html.
Basically we have to distinguish between the following error cases:

1. Unrecoverable error, an error which will occur with every retry, therefore there is no need to try to execute the same transformer on the same resource again.
2. Recoverable error, the retry should happen immediately or after a short waiting time (independent of other OSGi Installer events)
3. Recoverable error, the retry should happen with the next cycle of the OSGi Installer

Issue Links

• is related to: SLING-8281 Exceptions in the ConfigInstallTasks should lead to log messages with category "WARN"
• relates to: SLING-5457 OsgiInstaller should retry to start bundles on failures