[ovs-build] Failed: ovsrobot/ovn#317 (series_147182 - 917bfc9)

[Travis CI]

Build Update for ovsrobot/ovn
-------------------------------------

Build: #317
Status: Failed

Duration: 28 mins and 35 secs
Commit: 917bfc9 (series_147182)
Author: Dumitru Ceara
Message: ovn-controller: Run I-P engine even when no SB txn is available.

If the last ovn-controller main loop run started a transaction to the
Southbound DB and the transaction is still in progress, ovn-controller
will not call engine_run(). In case there were changes to the DB,
engine_need_run() would return true which would trigger an immediate
forced recompute in the next processing loop iteration.

However, there are scenarios when updates can be processed incrementally
even if no Southbound DB transaction is available. One example, often
seen in the field, is when the MAC_Binding table is updated. Currently
such an update received while a transaction is still committing would
trigger a forced recompute.

This patch performs only incremental processing when the SB DB txn
is NULL, which means executing change_handler() methods
only, without calling the run() methods of the I-P engine nodes.
Assuming that some change handlers need to update the DB and that
some don't, if the SB DB txn is NULL:
- if the incoming change doesn't trigger a SB DB update (currently true
  for all existing change handlers) then the change handler might
  complete without aborting if it doesn't trigger a run() of the node.
- if the incoming change tries to perform a SB DB update, the change
  handler should return false (SB DB txn is NULL) triggering the engine
  to call run() and abort computation.

CC: Han Zhou <hzhou at ovn.org>
CC: Numan Siddique <numans at ovn.org>
Signed-off-by: Dumitru Ceara <dceara at redhat.com>
Signed-off-by: 0-day Robot <robot at bytheb.org>

View the changeset: https://github.com/ovsrobot/ovn/commit/917bfc9d68f5

View the full build log and details: https://travis-ci.com/ovsrobot/ovn/builds/140199240?utm_medium=notification&utm_source=email

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