tree da48625514647b5ec29eb591ffa8d66e574de6ef
parent c3c23574327d8c950820ea3e6539f4a1ade77fb3
author Abdullah Alamoudi <bamousaa@gmail.com> 1518632860 -0800
committer abdullah alamoudi <bamousaa@gmail.com> 1518820456 -0800

[NO ISSUE][STO] Perform IO reads in uninterruptible threads

- user model changes: no
- storage format changes: no
- interface changes: no

details:
- Previously, IO reads are performed on the task threads.
- Task threads can be interrupted which can cause deadlocks
  due to a JDK synchronization bug.
- After this change, 2 IO read threads are there per IO device.
- Threads will receive IO read requests and process them.
- Such threads are never interrupted and are killed through
  the use of a poison pill.

Change-Id: Id28d57a222f42962284b24296cb9b91658e5dc77
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2387
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Michael Blow <mblow@apache.org>