Why HDFS impersonation is not compatible with Hive caching?

[ImTangYun]

Any way make HDFS impersonation compatible with Hive caching?

[ImTangYun]

I found that when I comment code as follow, rubix works naomal, is there any risk？
@OverRide
public void initializeConfiguration(Configuration config)
{
// checkArgument(!authenticationConfig.isHdfsImpersonationEnabled(), "HDFS impersonation is not compatible with Hive caching");
config.set("fs.hdfs.impl", RUBIX_DISTRIBUTED_FS_CLASS_NAME);
}