CQ5.5: NullPointerException for wcm-mobile-core after installing SP1 or SP2.1

Issue

If you have installed CQ 5.5 SP1 or SP2.1 and restarted the instance you may notice the following exception in the logs on startup:

ERROR [Background Update com.day.cq.wcm.cq-wcm-mobile-core (219)] com.day.cq.wcm.cq-wcm-mobile-core [com.day.cq.wcm.mobile.core.impl.redirect.RedirectFilter]
The bindStats method has thrown an exception (java.lang.NullPointerException) java.lang.NullPointerException
at com.day.cq.wcm.mobile.core.impl.redirect.RedirectFilter.bindStats(RedirectFilter.java:173)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:227)
at org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:38)
at org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:591)
at org.apache.felix.scr.impl.helper.BaseMethod$NotResolved.invoke(BaseMethod.java:548)
at org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:472)

Reason

This error is caused by an issue in the mobile redirect servlet in SP1 and SP2.1.  It will only affect this servlet, which gathers usage statistics on various categories of mobile devices.

Solution

If you do not require a fix for this servlet you can ignore this error.  The issue is currently scheduled to be fixed in the next service pack for CQ5.5.  If you require an urgent solution to this issue you can contact support through Daycare.

reference: (CQ5-18788/NPR-2071)

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