[GitHub] [accumulo] keith-turner edited a comment on issue #1321: Review how Ample reads root tablet metadata from zookeeper

[GitBox <gi...@apache.org>]

keith-turner edited a comment on issue #1321:
URL: https://github.com/apache/accumulo/issues/1321#issuecomment-758197054


   I have been looking into this and have found two problematic cases so far.
   
    1. For GC its possible that newer delete candidates and stale tablet files could be read.  In general this would be problematic, the root table may be okay because there is only a single tablet. However its still very dicey.
    1. When the root tablet is loaded, the root tablets metadata is read from ZooCache.  This could possibly result in the root tablet using an older list of files, which is unacceptable.
   
   After finding the 2nd case above I realized a change had to be made and stopped reviewing the existing code.  I am going to explore changing root tablet reads to default to immediately consistent, with the option read the data an eventually consistent manner.  


----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

For queries about this service, please contact Infrastructure at:
users@infra.apache.org