[ https://issues.apache.org/jira/browse/SLING-3913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chetan Mehrotra resolved SLING-3913. ------------------------------------ Resolution: Later Fix Version/s: (was: Commons Log 4.0.4) The above error is just a warning seen in log but logging would still work. With some work the warning can be avoided. For now no plan to address that so resolving as {{Later}}. If required the issue can be reopened later > Sling Logging fails to work in Eclipse Virgo > -------------------------------------------- > > Key: SLING-3913 > URL: https://issues.apache.org/jira/browse/SLING-3913 > Project: Sling > Issue Type: Bug > Components: Commons > Affects Versions: Commons Log 4.0.0 > Reporter: Chetan Mehrotra > Assignee: Chetan Mehrotra > Priority: Minor > > Logging fails to work initially in SAP NetWeaver environment which run on top > of OSGi using Eclipse Virgo which already use Logback. Following error is > seen in app server logs. Note that evetually later logging does work, just > that initial few logs which are generated before Sling Logging bundle gets > started are lost > {noformat} > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web##Reported > exception:| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web##java.lang.ClassNotFoundException: > org.eclipse.virgo.medic.log.logback.DelegatingContextSelector not found by > org.apache.sling.commons.log [14]| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1550)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:77)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1973)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at java.lang.ClassLoader.loadClass(ClassLoader.java:415)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at java.lang.Class.forName0(Native Method)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at java.lang.Class.forName(Class.java:186)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at ch.qos.logback.core.util.Loader.loadClass(Loader.java:185)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > ch.qos.logback.classic.util.ContextSelectorStaticBinder.dynamicalContextSelector(ContextSelectorStaticBinder.java:97)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > ch.qos.logback.classic.util.ContextSelectorStaticBinder.init(ContextSelectorStaticBinder.java:72)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:93)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:55)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at org.slf4j.LoggerFactory.bind(LoggerFactory.java:129)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:302)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:276)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:288)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.apache.sling.installer.provider.file.impl.ServicesListener.<init>(ServicesListener.java:45)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.apache.sling.installer.provider.file.impl.Activator.start(Activator.java:66)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:645)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at org.apache.felix.framework.Felix.activateBundle(Felix.java:2152)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at org.apache.felix.framework.Felix.startBundle(Felix.java:2070)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1297)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at > org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:304)| > 2014 09 04 > 06:43:32#+00#ERROR#System.err##anonymous#FelixStartLevel##adsdev#deployedauthor1#web## > at java.lang.Thread.run(Thread.java:789)| > 2014 09 04 > 06:48:05#+00#INFO#System.out##anonymous#FelixStartLevel##adsdev#deployedauthor1#web##Attempting > to load ESAPI.properties via file I/O.| > {noformat} > Logback has some [discovery > mechanism|http://logback.qos.ch/manual/contextSelector.html] where it looks > for a system property {{logback.ContextSelector}} and loads the configured > class if set. As SAP NetWeaver Cloud internally uses Eclipse Virgo which also > uses Logback it has set a value for that system property and that causes the > issue. > As a fix we should disable this discovery logic in Logback -- This message was sent by Atlassian JIRA (v6.3.4#6332)