Subscription Matching fails to open

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Environment

SUSE Manager 4

SUSE Manager 3.2

Situation

Following screen can be seen when opening Subscription Matching after subscription matcher patching:

In /var/log/rhn/rhn_web_ui.log you can see below message:

ERROR com.redhat.rhn.frontend.servlets.SessionFilter - Error during transaction. Rolling back
java.lang.NullPointerException
   at com.suse.manager.webui.services.subscriptionmatching.SubscriptionMatchProcessor.subscriptions(SubscriptionMatchProcessor.java:148)
   at com.suse.manager.webui.services.subscriptionmatching.SubscriptionMatchProcessor.getData(SubscriptionMatchProcessor.java:65)
   at com.suse.manager.webui.controllers.SubscriptionMatchingController.data(SubscriptionMatchingController.java:72)
   at com.suse.manager.webui.utils.SparkApplicationHelper.lambda$withRole$7(SparkApplicationHelper.java:258)
   at spark.RouteImpl$1.handle(RouteImpl.java:72)
   at spark.http.matching.Routes.execute(Routes.java:61)
   at spark.http.matching.MatcherFilter.doFilter(MatcherFilter.java:130)

...

Resolution

1. log in as SUMA admin on webUI
2. go to Admin -> Task Schedules
3. select the 'gatherer-matcher-default'
4. go to 'gatherer-matcher-bunch'
5. click 'Single Run Schedule'
6. wait until the gatherer-matcher bunch finishes (you can watch that under 'Admin -> Task Engine Status'). It can take few minutes to finish.

Cause

The format of the subscription matcher output changed after fix, matcher needs to be rerun. This is done automatically usually at midnight, when gatherer-matcher runs. In case you need to use subscription matching right after patching, follow above mentioned steps.

Disclaimer

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