Standalone Server instances sometimes attempt to form a cluster and log error messages

Members [1] {
Member [172.26.101.100]:5701 this
}
2016-10-11 01:27:15,320 INFO [cached3] c.h.p.InternalPartitionService [172.26.101.100]:5701 [atlbitbucket] [3.5.2-atlassian-37] Initializing cluster partition table first arrangement...
2016-10-11 01:27:15,341 ERROR [hz.hazelcast.partition-operation.thread-2] c.h.m.impl.operation.MergeOperation [172.26.101.100]:5701 [atlbitbucket] [3.5.2-atlassian-37] Failed to deserialize enum: com.atlassian$
com.hazelcast.nio.serialization.HazelcastSerializationException: Failed to deserialize enum: com.atlassian.analytics.client.configuration.AnalyticsConfig$Key
at com.hazelcast.nio.serialization.DefaultSerializers$EnumSerializer.read(DefaultSerializers.java:253) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.nio.serialization.DefaultSerializers$EnumSerializer.read(DefaultSerializers.java:235) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.nio.serialization.StreamSerializerAdapter.read(StreamSerializerAdapter.java:41) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.nio.serialization.SerializationServiceImpl.toObject(SerializationServiceImpl.java:276) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.NodeEngineImpl.toObject(NodeEngineImpl.java:200) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.map.impl.MapServiceContextImpl.toObject(MapServiceContextImpl.java:309) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.map.impl.DefaultRecordStore.merge(DefaultRecordStore.java:858) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.map.impl.operation.MergeOperation.run(MergeOperation.java:55) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.run(OperationRunnerImpl.java:137) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.processOperation(OperationThread.java:154) [hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.process(OperationThread.java:110) [hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.doRun(OperationThread.java:101) [hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.run(OperationThread.java:76) [hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
java.lang.ClassNotFoundException: com.atlassian.analytics.client.configuration.AnalyticsConfig$Key
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1332) ~[catalina.jar:8.0.36]
at com.hazelcast.nio.ClassLoaderUtil.tryLoadClass(ClassLoaderUtil.java:125) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.nio.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:114) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.nio.serialization.DefaultSerializers$EnumSerializer.read(DefaultSerializers.java:251) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.nio.serialization.DefaultSerializers$EnumSerializer.read(DefaultSerializers.java:235) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.nio.serialization.StreamSerializerAdapter.read(StreamSerializerAdapter.java:41) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.nio.serialization.SerializationServiceImpl.toObject(SerializationServiceImpl.java:276) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.NodeEngineImpl.toObject(NodeEngineImpl.java:200) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.map.impl.MapServiceContextImpl.toObject(MapServiceContextImpl.java:309) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.map.impl.DefaultRecordStore.merge(DefaultRecordStore.java:858) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.map.impl.operation.MergeOperation.run(MergeOperation.java:55) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.run(OperationRunnerImpl.java:137) ~[hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.processOperation(OperationThread.java:154) [hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.process(OperationThread.java:110) [hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.doRun(OperationThread.java:101) [hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.run(OperationThread.java:76) [hazelcast-3.5.2-atlassian-37.jar:3.5.2-atlassian-37]
... 1 frame trimmed