[SLING-3340] Warnings on startup regarding no-op loggers

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Commons Log 4.0.0
• Component/s: Commons
• Assignee: Chetan Mehrotra
• Reporter: Chetan Mehrotra
• Created: 25/Jan/14 07:06
• Updated: 22/Jul/15 06:40
• Resolved: 22/Jul/15 06:40

Description

Depening on the order in which bundles are installed Slf4j might use NoOp loggers for loggers created before Logback is initialized. One would see a warning log like below

Slf4j is not initialized yet. Delaying Logback support initialization
SLF4J: The following loggers will not work because they were created
SLF4J: during the default configuration phase of the underlying logging system.
SLF4J: See also http://www.slf4j.org/codes.html#substituteLogger
SLF4J: org.apache.sling.commons.logservice
SLF4J: org.apache.sling.installer.core
SLF4J: org.apache.sling.installer.core.impl.OsgiInstallerImpl
SLF4J: org.apache.sling.audit.osgi.installer
SLF4J: org.apache.sling.installer.core.impl.PersistentResourceList
SLF4J: org.apache.sling.installer.core.impl.EntityResourceList
SLF4J: org.apache.sling.installer.core.impl.tasks.BundleTaskCreator
SLF4J: org.apache.sling.installer.core.impl.DefaultTransformer
SLF4J: org.apache.sling.installer.provider.file
SLF4J: org.apache.sling.installer.provider.file.impl.ServicesListener
SLF4J: org.apache.sling.installer.provider.file.impl.FileInstaller
SLF4J: org.apache.sling.javax.activation
SLF4J: org.apache.sling.javax.activation.internal.Activator
SLF4J: org.apache.sling.javax.activation.internal.OsgiMailcapCommandMap
SLF4J: org.apache.sling.launchpad.installer
SLF4J: org.apache.sling.settings
SLF4J: org.apache.sling.settings.impl.SlingSettingsServiceImpl
SLF4J: org.apache.sling.launchpad.installer.impl.LaunchpadConfigInstaller
SLF4J: org.apache.sling.installer.core.impl.tasks.RestartActiveBundlesTask

Given that log from Sling installer category are important and should not be lost we should avoid such scenario to be created.

See thread http://markmail.org/thread/n4zyj5akkh24ahh5

Issue Links

• is related to: SLING-3386 Enable support starting bundle in custom oreder at start level 1