Exception in thread "main" java.lang.ClassCastException: java.util.concurrent.TimeUnit$4 cannot be cast to com.google.common.base.Optional
at io.dropwizard.validation.valuehandling.OptionalValidatedValueUnwrapper.handleValidatedValue(OptionalValidatedValueUnwrapper.java:15)
at org.hibernate.validator.internal.engine.ValueContext.getCurrentValidatedValue(ValueContext.java:121)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:110)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:87)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:73)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:592)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:555)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:490)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:454)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:406)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedConstraint(ValidatorImpl.java:770)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedConstraints(ValidatorImpl.java:656)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:415)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedConstraint(ValidatorImpl.java:770)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedConstraints(ValidatorImpl.java:656)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:415)
at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:204)
at io.dropwizard.configuration.ConfigurationFactory.validate(ConfigurationFactory.java:257)
at io.dropwizard.configuration.ConfigurationFactory.build(ConfigurationFactory.java:149)
at io.dropwizard.configuration.ConfigurationFactory.build(ConfigurationFactory.java:95)
at io.dropwizard.cli.ConfiguredCommand.parseConfiguration(ConfiguredCommand.java:115)
at io.dropwizard.cli.ConfiguredCommand.run(ConfiguredCommand.java:64)
at io.dropwizard.cli.Cli.run(Cli.java:70)
at io.dropwizard.Application.run(Application.java:80)
I am using metrics-core 0.9.1, metrics-graphite 3.1.2, and dropwizard-metrics-graphite 0.9.1.
Any help would be appreciated!