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liquibase.exception.UnexpectedLiquibaseException: java.lang.NullPointerException at liquibase.diff.compare.DatabaseObjectComparatorFactory.<init>(DatabaseObjectComparatorFactory.java:34)[liquibase-core-3.4.2.jar:na] at liquibase.diff.compare.DatabaseObjectComparatorFactory.getInstance(DatabaseObjectComparatorFactory.java:44)[liquibase-core-3.4.2.jar:na] at liquibase.structure.DatabaseObjectCollection.add(DatabaseObjectCollection.java:81)[liquibase-core-3.4.2.jar:na] at liquibase.snapshot.DatabaseSnapshot.include(DatabaseSnapshot.java:205)[liquibase-core-3.4.2.jar:na] at liquibase.snapshot.DatabaseSnapshot.init(DatabaseSnapshot.java:70)[liquibase-core-3.4.2.jar:na] at liquibase.snapshot.DatabaseSnapshot.<init>(DatabaseSnapshot.java:44)[liquibase-core-3.4.2.jar:na] at liquibase.snapshot.JdbcDatabaseSnapshot.<init>(JdbcDatabaseSnapshot.java:21)[liquibase-core-3.4.2.jar:na] at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot(SnapshotGeneratorFactory.java:150)[liquibase-core-3.4.2.jar:na] at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot(SnapshotGeneratorFactory.java:158)[liquibase-core-3.4.2.jar:na] at liquibase.snapshot.SnapshotGeneratorFactory.getDatabaseChangeLogTable(SnapshotGeneratorFactory.java:165)[liquibase-core-3.4.2.jar:na] at liquibase.changelog.StandardChangeLogHistoryService.init(StandardChangeLogHistoryService.java:101)[liquibase-core-3.4.2.jar:na] at liquibase.Liquibase.checkLiquibaseTables(Liquibase.java:1076)[liquibase-core-3.4.2.jar:na] at liquibase.Liquibase.update(Liquibase.java:205)[liquibase-core-3.4.2.jar:na] at liquibase.Liquibase.update(Liquibase.java:192)[liquibase-core-3.4.2.jar:na] at liquibase.Liquibase.update(Liquibase.java:188)[liquibase-core-3.4.2.jar:na] at liquibase.Liquibase.update(Liquibase.java:181)[liquibase-core-3.4.2.jar:na]