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java.lang.NullPointerException: null at com.hazelcast.map.impl.record.AbstractRecordWithStats.getCost(AbstractRecordWithStats.java:62)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.map.impl.record.DataRecordWithStats.getCost(DataRecordWithStats.java:38)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.map.impl.MapSizeEstimator.getCost(MapSizeEstimator.java:46)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.map.impl.MapSizeEstimator.getCost(MapSizeEstimator.java:26)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.map.impl.AbstractRecordStore.calculateRecordHeapCost(AbstractRecordStore.java:119)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.map.impl.DefaultRecordStore.putRecord(DefaultRecordStore.java:178)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.map.impl.operation.MapReplicationOperation.run(MapReplicationOperation.java:123)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.partition.impl.MigrationOperation.runMigrationTask(MigrationOperation.java:177)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.partition.impl.MigrationOperation.migrate(MigrationOperation.java:155)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.partition.impl.MigrationOperation.doRun(MigrationOperation.java:93)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.partition.impl.MigrationOperation.run(MigrationOperation.java:79)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.run(OperationRunnerImpl.java:137)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.run(OperationRunnerImpl.java:315)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.processPacket(OperationThread.java:142)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.process(OperationThread.java:115)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.doRun(OperationThread.java:101)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36] at com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.run(OperationThread.java:76)[hazelcast-3.5.2-atlassian-36.jar:3.5.2-atlassian-36]