tree bf2d14b0cb5e96c9fb165da6fe54d7be71f1e7ba
parent 5ed79cf515a8bdad660f4a106bcdc1bdda34dc6b
author Hector Oswaldo Caballero <hector.caballero@ericsson.com> 1463427747 -0400
committer Hector Oswaldo Caballero <hector.caballero@ericsson.com> 1463757330 -0400

Avoid race condition between indexing threads

When more than one thread try to index a change in the target instance,
it could be possible that, because of a race condition, the last thread
writes an outdated status to the index.

Synchronize the threads indexing the same change while still allowing
parallelization between threads indexing different changes.

Change-Id: Ic47c9d220f124c096e5e66bb46d13a9a7b0f51e7