Cinder stacktracing on "InvalidInput: Invalid input received"

[Joe Gordon]

cinder is throwing stacktraces on InvalidInputs.

2014-10-02 14:32:01.623 22040 WARNING cinder.volume.api [req-54eb6e27-a718-4b36-9a8f-5a8351ea4751 b88bcf5353ec4b0eb7acaa0c219e3da1 4b5d0e6df2ff43539e77ec40f700b594 - - -] Task 'cinder.volume.flows.api.create_volume.ExtractVolumeRequestTask;volume:create' (867f6be9-ad17-4273-8423-498a685fca52) transitioned into state 'FAILURE'
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api Traceback (most recent call last):
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api File "/usr/local/lib/python2.7/dist-packages/taskflow/engines/action_engine/executor.py", line 35, in _execute_task
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api result = task.execute(**arguments)
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api File "/opt/stack/new/cinder/cinder/volume/flows/api/create_volume.py", line 399, in execute
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api size = self._extract_size(size, source_volume, snapshot)
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api File "/opt/stack/new/cinder/cinder/volume/flows/api/create_volume.py", line 220, in _extract_size
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api func(size)
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api File "/opt/stack/new/cinder/cinder/volume/flows/api/create_volume.py", line 198, in validate_int
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api raise exception.InvalidInput(reason=msg)
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api InvalidInput: Invalid input received: Volume size must be an integer and greater than 0
2014-10-02 14:32:01.623 22040 TRACE cinder.volume.api

Stacktraces should be saved for unexpected errors and a invalid input is an excepted error.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/125712

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/125712
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=3e36fb9666cf3d8fad73b2f7274f272588303718
Submitter: Jenkins
Branch: master

commit 3e36fb9666cf3d8fad73b2f7274f272588303718
Author: Joe Gordon <email address hidden>
Date: Thu Oct 2 10:11:48 2014 -0700

    Stop stacktracing on InvalidInput exceptions

    InvalidInput is an expected error case, no need to stacktrace for it,
    just log the error.

    Change-Id: Ifcca98effd3ab153af30d21f2f23094210fe8ce3
    Closes-Bug: #1376839