I am developing my own under fs to alluxio, like the one s3a, however, when I persist the data , I get strange in master:
sounds like a memory corruption. Maybe my code is not stable yet, but shouldn't it impact the alluxio original code?
To help debug, you may want to use the debugging options listed here to attach the your IDE to the Alluxio master process and step through the ObjectUnderFileSystem methods.
For the strange list status / get object metadata, could you verify if your under store is configured correctly? For example, it could be returning files which are from your local file system?