private static SystemStreamMetadata.SystemStreamPartitionMetadata sspMetadata(long baseOffset) {
    return new SystemStreamMetadata.SystemStreamPartitionMetadata(Long.toString(baseOffset),
        Long.toString(baseOffset * 100), Long.toString(baseOffset * 100 + 1));
  }
Given that the admin throws an exception when trying to get the metadata after a successful fetch, getMetadata
should propagate the exception.
samza-core/src/test/java/org/apache/samza/system/TestSSPMetadataCache.java