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Hello,

I realized, issue (limitation #1 as I called it) is there really because of comments. And it throws different kind of errors into zuul logs depending on fact WHERE VERTICALLY I put the comments.

I validated my layout via yaml-lint and yamllint (thanks for tip) and it is valid yaml file (it has only long-lines reported)

Sometimes [1], when change-queue is empty (sandbox pipeline) it works. This is after I zuul stop & start zuul. Sandbox pipeline gets broken after few patchsets arrived.

Sometimes [2] it happens that it does not work even for 1st time (after fresh start of zuul and sending 1st patchset into sandbox pipeline)

Sometimes [3] I got in advance additional error.

All is happening despite the fact comments are aligned as they should (validate via yaml-lint) HORIZONTALLY.

I realized that it is because section jobs: I have in /etc/zuul/layout/layout.yaml
But even without comments, after a while, it gets broken.

Working for some while (without comments):
jobs:
  - name: ^.*$
    parameter-function: single_use_node

 - name: ^3rdparty-nfv-ci.*$
    parameter-function: single_use_node

NOT working (below):
  - name: ^.*$
    parameter-function: single_use_node

  - name: ^3rdparty-nfv-ci.*$
    parameter-function: single_use_node
    # branch: ^(?!.*stable/mitaka).*$
    # parameter-function: set_proxy

NOT working (above – working only for 1st patchset):
  - name: ^.*$
    parameter-function: single_use_node

    # branch: ^(?!.*stable/mitaka).*$
    # parameter-function: set_proxy
  - name: ^3rdparty-nfv-ci.*$
    parameter-function: single_use_node


NOT working (below with one empty line):
  - name: ^.*$
    parameter-function: single_use_node

  - name: ^3rdparty-nfv-ci.*$
    parameter-function: single_use_node

    # branch: ^(?!.*stable/mitaka).*$
    # parameter-function: set_proxy

NOT working (below and not aligned horizontally – yaml-lint blames me):
  - name: ^.*$
    parameter-function: single_use_node

  - name: ^3rdparty-nfv-ci.*$
    parameter-function: single_use_node
  # branch: ^(?!.*stable/mitaka).*$
  # parameter-function: set_proxy


[1]
2016-04-04 14:39:53,504 INFO zuul.Scheduler: Adding openstack-dev/ci-sandbox, <Change 0x7fcb20753a90 282323,1> to <Pipeline sandbox>
2016-04-04 14:39:53,504 DEBUG zuul.IndependentPipelineManager: Considering adding change <Change 0x7fcb20753a90 282323,1>
2016-04-04 14:39:53,505 ERROR zuul.Scheduler: Exception in run handler:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 962, in run
    self.process_event_queue()
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 1018, in process_event_queue
    pipeline.manager.addChange(change)
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 1366, in addChange
    with self.getChangeQueue(change, change_queue) as change_queue:
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 1889, in getChangeQueue
    if change.project not in self.pipeline.getProjects():
  File "/usr/local/lib/python2.7/dist-packages/zuul/model.py", line 111, in getProjects
    return sorted(self.job_trees.keys(), lambda a, b: cmp(a.name, b.name))
  File "/usr/local/lib/python2.7/dist-packages/zuul/model.py", line 111, in <lambda>
    return sorted(self.job_trees.keys(), lambda a, b: cmp(a.name, b.name))
AttributeError: 'NoneType' object has no attribute 'name'


[2]
2016-04-07 07:06:28,874 INFO zuul.Scheduler: Adding openstack-dev/ci-sandbox, <Change 0x7f29902898d0 282323,1> to <Pipeline sandbox>
2016-04-07 07:06:28,875 ERROR zuul.Scheduler: Exception in run handler:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 962, in run
    self.process_event_queue()
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 1018, in process_event_queue
    pipeline.manager.addChange(change)
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 1366, in addChange
    with self.getChangeQueue(change, change_queue) as change_queue:
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 1892, in getChangeQueue
    change_queue.addProject(change.project)
  File "/usr/local/lib/python2.7/dist-packages/zuul/model.py", line 332, in addProject
    names = [x.name for x in self.projects]
2016-04-07 07:06:31,055 INFO zuul.Scheduler: Adding openstack-dev/ci-sandbox, <Change 0x7f29902898d0 282323,1> to <Pipeline sandbox>

2016-04-07 07:40:11,027 ERROR zuul.Scheduler: Exception in run handler:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 962, in run
    self.process_event_queue()
  File "/usr/local/lib/python2.7/dist-packages/zuul/scheduler.py", line 1001, in process_event_queue
    change = pipeline.source.getChange(event, project)
  File "/usr/local/lib/python2.7/dist-packages/zuul/source/gerrit.py", line 133, in getChange
    refresh=refresh)
  File "/usr/local/lib/python2.7/dist-packages/zuul/source/gerrit.py", line 156, in _getChange
    self._updateChange(change, history)
  File "/usr/local/lib/python2.7/dist-packages/zuul/source/gerrit.py", line 275, in _updateChange
    dep = self._getChange(dep_num, dep_ps, history=history)
  File "/usr/local/lib/python2.7/dist-packages/zuul/source/gerrit.py", line 156, in _getChange
    self._updateChange(change, history)
  File "/usr/local/lib/python2.7/dist-packages/zuul/source/gerrit.py", line 219, in _updateChange
    data = self.connection.query(change.number)
  File "/usr/local/lib/python2.7/dist-packages/zuul/connection/gerrit.py", line 287, in query
    out, err = self._ssh(cmd)
  File "/usr/local/lib/python2.7/dist-packages/zuul/connection/gerrit.py", line 383, in _ssh
    raise Exception("Gerrit error executing %s" % command)
Exception: Gerrit error executing gerrit query --format json --all-approvals --comments --commit-message --current-patch-set --dependencies --files --patch-sets --submit-records 298130

Vaclav

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