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Exception in Error.log - Plugin could not be located: hazelcast


I upgraded from 4.0.3 to latest 4.2.3 and in the Error.log is starting to be filled with:

2018.04.19 10:25:29 org.jivesoftware.openfire.container.PluginMonitor - An unexpected exception occurred:
java.util.concurrent.ExecutionException: java.lang.NullPointerException: Plugin could not be located: hazelcast

every half minute or so. I don’t have hazelcast plugin installed and also clustering is disabled. Is there any way to get rid of this error?



That seems very odd. You can confirm there’s no hazelcast.jar and no hazelcast directory in the plugins folder? If not, then I just wouldn’t worry about it.