Claim Job Error

gistfile1.txt

JobFailure: Claiming
failure: 1fc767e7-ff15-438b-bf97-7a4fcf28fad2
(/taskflow/jobs/poppy_service_job/job0000215924), session expired#012
SessionExpiredError#012Traceback (most recent call last):#012  File
"/srv/poppy/bin/poppy-worker", line 11, in <module>#012
sys.exit(run())#012  File
"/srv/poppy/local/lib/python2.7/site-packages/poppy/cmd/task_flow_worker.py
", line 34, in run#012
b.distributed_task.services_controller.run_task_worker(name=conductor_name)
#012  File 
"/srv/poppy/local/lib/python2.7/site-packages/poppy/distributed_task/taskfl
ow/services.py", line 108, in run_task_worker#012    conductor.run()#012
File 
"/srv/poppy/local/lib/python2.7/site-packages/taskflow/conductors/backends/
impl_executor.py", line 319, in run#012
max_dispatches=max_dispatches)#012  File
"/srv/poppy/local/lib/python2.7/site-packages/taskflow/conductors/backends/
impl_executor.py", line 283, in _run_until_dead#012
self._jobboard.claim(job, self._name)#012  File
"/srv/poppy/local/lib/python2.7/site-packages/taskflow/jobs/base.py", line
485, in wrapper#012    return meth(self, job, who, *args, **kwargs)#012
File 
"/srv/poppy/local/lib/python2.7/site-packages/taskflow/jobs/backends/impl_z
ookeeper.py", line 521, in claim#012    " not succeeding" % (job.uuid),
cause=e)#012  File "/usr/lib/python2.7/contextlib.py", line 35, in
__exit__#012    self.gen.throw(type, value, traceback)#012  File
"/srv/poppy/local/lib/python2.7/site-packages/taskflow/jobs/backends/impl_z
ookeeper.py", line 542, in _wrap#012
excp.raise_with_cause(excp.JobFailure, fail_msg_tpl % (job_uuid))#012
File 
"/srv/poppy/local/lib/python2.7/site-packages/taskflow/exceptions.py",
line 52, in raise_with_cause#012    excutils.raise_with_cause(exc_cls,
message, *args, **kwargs)#012  File
"/srv/poppy/local/lib/python2.7/site-packages/oslo_utils/excutils.py",
line 143, in raise_with_cause#012    six.raise_from(exc_cls(message,
*args, **kwargs), kwargs.get('cause'))#012  File
"/srv/poppy/local/lib/python2.7/site-packages/six.py", line 718, in
raise_from#012    raise value#012JobFailure: Claiming failure:
1fc767e7-ff15-438b-bf97-7a4fcf28fad2
(/taskflow/jobs/poppy_service_job/job0000215924), session expired#012
SessionExpiredError