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java.lang.NullPointerException at liquibase.diff.compare.DatabaseObjectComparatorFactory.isSameObject(DatabaseObjectComparatorFactory.java:91) at liquibase.snapshot.DatabaseSnapshot.get(DatabaseSnapshot.java:180) at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot(SnapshotGeneratorFactory.java:137) at liquibase.snapshot.SnapshotGeneratorFactory.has(SnapshotGeneratorFactory.java:87) at liquibase.snapshot.SnapshotGeneratorFactory.hasDatabaseChangeLogTable(SnapshotGeneratorFactory.java:160) at liquibase.database.AbstractJdbcDatabase.hasDatabaseChangeLogTable(AbstractJdbcDatabase.java:726) at liquibase.database.AbstractJdbcDatabase.getRanChangeSetList(AbstractJdbcDatabase.java:1127) at liquibase.database.AbstractJdbcDatabase.checkDatabaseChangeLogTable(AbstractJdbcDatabase.java:695) at liquibase.Liquibase.checkDatabaseChangeLogTable(Liquibase.java:602) at liquibase.Liquibase.update(Liquibase.java:130) at com.codahale.dropwizard.migrations.DbMigrateCommand.run(DbMigrateCommand.java:58) at com.codahale.dropwizard.migrations.DbCommand.run(DbCommand.java:51) at com.codahale.dropwizard.migrations.AbstractLiquibaseCommand.run(AbstractLiquibaseCommand.java:54) at com.codahale.dropwizard.cli.ConfiguredCommand.run(ConfiguredCommand.java:62) at com.codahale.dropwizard.cli.Cli.run(Cli.java:69) at com.codahale.dropwizard.Application.run(Application.java:72) at com.example.helloworld.HelloWorldApplication.main(HelloWorldApplication.java:22)