After upgrading Java version, AEM does not start up | AEM

Issue

After updating from AEM 6.1 + JDK7 to AEM 6.2 + JDK8, the AEM instance fails to start with the following errors in stdout.log:

03.05.2017 21:49:20.352 *ERROR* [FelixStartLevel] ERROR: Bundle '1' Error starting slinginstall:log4j-over-slf4j-1.7.6.jar (org.osgi.framework.BundleException: Unable to resolve log4j.over.slf4j [1](R 1.0): missing requirement [log4j.over.slf4j [1](R 1.0)] osgi.wiring.package; (&(osgi.wiring.package=org.slf4j.helpers)(version>=1.6.0)) [caused by: Unable to resolve slf4j.api [16](R 16.0): missing requirement [slf4j.api [16](R 16.0)] osgi.ee; (&(osgi.ee=JavaSE)(version=1.3.0))] Unresolved requirements: [[log4j.over.slf4j [1](R 1.0)] osgi.wiring.package; (&(osgi.wiring.package=org.slf4j.helpers)(version>=1.6.0))])
org.osgi.framework.BundleException: Unable to resolve log4j.over.slf4j [1](R 1.0): missing requirement [log4j.over.slf4j [1](R 1.0)] osgi.wiring.package; (&(osgi.wiring.package=org.slf4j.helpers)(version>=1.6.0)) [caused by: Unable to resolve slf4j.api [16](R 16.0): missing requirement [slf4j.api [16](R 16.0)] osgi.ee; (&(osgi.ee=JavaSE)(version=1.3.0))] Unresolved requirements: [[log4j.over.slf4j [1](R 1.0)] osgi.wiring.package; (&(osgi.wiring.package=org.slf4j.helpers)(version>=1.6.0))]
at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:4111)
at org.apache.felix.framework.Felix.startBundle(Felix.java:2117)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1371)
at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:308)
at java.lang.Thread.run(Thread.java:745)
03.05.2017 21:49:20.356 *ERROR* [FelixStartLevel] ERROR: Bundle '2' Error starting slinginstall:org.apache.sling.commons.logservice-1.0.4.jar (org.osgi.framework.BundleException: Unable to resolve org.apache.sling.commons.logservice [2](R 2.1): missing requirement [org.apache.sling.commons.logservice [2](R 2.1)] osgi.ee; (&(osgi.ee=JavaSE)(version=1.6)) Unresolved requirements: [[org.apache.sling.commons.logservice [2](R 2.1)] osgi.ee; (&(osgi.ee=JavaSE)(version=1.6))])
org.osgi.framework.BundleException: Unable to resolve org.apache.sling.commons.logservice [2](R 2.1): missing requirement [org.apache.sling.commons.logservice [2](R 2.1)] osgi.ee; (&(osgi.ee=JavaSE)(version=1.6)) Unresolved requirements: [[org.apache.sling.commons.logservice [2](R 2.1)] osgi.ee; (&(osgi.ee=JavaSE)(version=1.6))]
at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:4111)
at org.apache.felix.framework.Felix.startBundle(Felix.java:2117)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1371)
at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:308)
at java.lang.Thread.run(Thread.java:745)
03.05.2017 21:49:20.367 *ERROR* [FelixStartLevel] ERROR: Bundle '3' Error starting slinginstall:com.adobe.granite.startup-0.6.2.jar (org.osgi.framework.BundleException: Unable to resolve com.adobe.granite.startup [3](R 3.0): missing requirement [com.adobe.granite.startup [3](R 3.0)] osgi.wiring.package; (&(osgi.wiring.package=org.slf4j)(version>=1.5.2)(!(version>=2.0.0))) [caused by: Unable to resolve slf4j.api [16](R 16.0): missing requirement [slf4j.api [16](R 16.0)] osgi.ee; (&(osgi.ee=JavaSE)(version=1.3.0))] Unresolved requirements: [[com.adobe.granite.startup [3](R 3.0)] osgi.wiring.package; (&(osgi.wiring.package=org.slf4j)(version>=1.5.2)(!(version>=2.0.0)))])

Resolution

  1. Stop AEM.

  2. Remove the following line from crx-quickstart/conf/sling.properties if exist:

    org.osgi.framework.system.capabilities=${eecap-${java.specification.version}}
  3. Start AEM.

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