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https://issues.apache.org/jira/browse/AIRFLOW-1370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16706336#comment-16706336
]
jack commented on AIRFLOW-1370:
-------------------------------
Possibly duplicate of: https://issues.apache.org/jira/browse/AIRFLOW-2219
> Scheduler is crashing because of IntegrityError
> -----------------------------------------------
>
> Key: AIRFLOW-1370
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1370
> Project: Apache Airflow
> Issue Type: Bug
> Components: celery, scheduler
> Affects Versions: 1.8.0
> Reporter: Maneesh Sharma
> Priority: Major
>
> Scheduler is crashing with multiple task running on Celery Executor. It is
> throwing `{color:red}IntegrityError: (psycopg2.IntegrityError) duplicate key
> value violates unique constraint "task_instance_pkey"{color}`. Below is the
> complete stack trace of error --
> Process DagFileProcessor490-Process:
> Traceback (most recent call last):
> File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in
> _bootstrap
> self.run()
> File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
> self._target(*self._args, **self._kwargs)
> File "/home/ubuntu/.local/lib/python2.7/site-packages/airflow/jobs.py",
> line 348, in helper
> pickle_dags)
> File "/home/ubuntu/.local/lib/python2.7/site-packages/airflow/utils/db.py",
> line 53, in wrapper
> result = func(*args, **kwargs)
> File "/home/ubuntu/.local/lib/python2.7/site-packages/airflow/jobs.py",
> line 1587, in process_file
> self._process_dags(dagbag, dags, ti_keys_to_schedule)
> File "/home/ubuntu/.local/lib/python2.7/site-packages/airflow/jobs.py",
> line 1176, in _process_dags
> self._process_task_instances(dag, tis_out)
> File "/home/ubuntu/.local/lib/python2.7/site-packages/airflow/jobs.py",
> line 880, in _process_task_instances
> run.verify_integrity(session=session)
> File "/home/ubuntu/.local/lib/python2.7/site-packages/airflow/utils/db.py",
> line 53, in wrapper
> result = func(*args, **kwargs)
> File "/home/ubuntu/.local/lib/python2.7/site-packages/airflow/models.py",
> line 4117, in verify_integrity
> session.commit()
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py",
> line 906, in commit
> self.transaction.commit()
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py",
> line 461, in commit
> self._prepare_impl()
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py",
> line 441, in _prepare_impl
> self.session.flush()
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py",
> line 2171, in flush
> self._flush(objects)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py",
> line 2291, in _flush
> transaction.rollback(_capture_exception=True)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/util/langhelpers.py",
> line 66, in __exit__
> compat.reraise(exc_type, exc_value, exc_tb)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py",
> line 2255, in _flush
> flush_context.execute()
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/unitofwork.py",
> line 389, in execute
> rec.execute(self)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/unitofwork.py",
> line 548, in execute
> uow
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/persistence.py",
> line 181, in save_obj
> mapper, table, insert)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/orm/persistence.py",
> line 799, in _emit_insert_statements
> execute(statement, multiparams)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py",
> line 945, in execute
> return meth(self, multiparams, params)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/sql/elements.py",
> line 263, in _execute_on_connection
> return connection._execute_clauseelement(self, multiparams, params)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py",
> line 1053, in _execute_clauseelement
> compiled_sql, distilled_params
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py",
> line 1189, in _execute_context
> context)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py",
> line 1402, in _handle_dbapi_exception
> exc_info
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/util/compat.py",
> line 203, in raise_from_cause
> reraise(type(exception), exception, tb=exc_tb, cause=cause)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py",
> line 1159, in _execute_context
> context)
> File
> "/home/ubuntu/.local/lib/python2.7/site-packages/sqlalchemy/engine/default.py",
> line 467, in do_executemany
> cursor.executemany(statement, parameters)
> IntegrityError: (psycopg2.IntegrityError) duplicate key value violates unique
> constraint "task_instance_pkey"
> DETAIL: Key (task_id, dag_id, execution_date)=(Hello_World_task-21,
> Hello_World_Tasks, 2017-07-04 06:59:40) already exists.
> [SQL: 'INSERT INTO task_instance (task_id, dag_id, execution_date,
> start_date, end_date, duration, state, try_number, hostname, unixname,
> job_id, pool, queue, priority_weight, operator, queued_dttm, pid) VALUES
> (%(task_id)s, %(dag_id)s, %(execution_date)s, %(start_date)s, %(end_date)s,
> %(duration)s, %(state)s, %(try_number)s, %(hostname)s, %(unixname)s,
> %(job_id)s, %(pool)s, %(queue)s, %(priority_weight)s, %(operator)s,
> %(queued_dttm)s, %(pid)s)'] [parameters: ({'task_id': 'Hello_World_task-21',
> 'unixname': 'ubuntu', 'job_id': None, 'end_date': None, 'pool': None,
> 'queued_dttm': None, 'execution_date': datetime.datetime(2017, 7, 4, 6, 59,
> 40), 'pid': None, 'try_number': 0, 'queue': 'default', 'duration': None,
> 'state': None, 'start_date': None, 'operator': None, 'priority_weight': 2,
> 'hostname': u'', 'dag_id': 'Hello_World_Tasks'}, {'task_id':
> 'Hello_World_task-20', 'unixname': 'ubuntu', 'job_id': None, 'end_date':
> None, 'pool': None, 'queued_dttm': None, 'execution_date':
> datetime.datetime(2017, 7, 4, 6, 59, 40), 'pid': None, 'try_number': 0,
> 'queue': 'default', 'duration': None, 'state': None, 'start_date': None,
> 'operator': None, 'priority_weight': 2, 'hostname': u'', 'dag_id':
> 'Hello_World_Tasks'}, {'task_id': 'Hello_World_task-23', 'unixname':
> 'ubuntu', 'job_id': None, 'end_date': None, 'pool': None, 'queued_dttm':
> None, 'execution_date': datetime.datetime(2017, 7, 4, 6, 59, 40), 'pid':
> None, 'try_number': 0, 'queue': 'default', 'duration': None, 'state': None,
> 'start_date': None, 'operator': None, 'priority_weight': 2, 'hostname': u'',
> 'dag_id': 'Hello_World_Tasks'}, {'task_id': 'Hello_World_task-22',
> 'unixname': 'ubuntu', 'job_id': None, 'end_date': None, 'pool': None,
> 'queued_dttm': None, 'execution_date': datetime.datetime(2017, 7, 4, 6, 59,
> 40), 'pid': None, 'try_number': 0, 'queue': 'default', 'duration': None,
> 'state': None, 'start_date': None, 'operator': None, 'priority_weight': 2,
> 'hostname': u'', 'dag_id': 'Hello_World_Tasks'}, {'task_id':
> 'Hello_World_task-25', 'unixname': 'ubuntu', 'job_id': None, 'end_date':
> None, 'pool': None, 'queued_dttm': None, 'execution_date':
> datetime.datetime(2017, 7, 4, 6, 59, 40), 'pid': None, 'try_number': 0,
> 'queue': 'default', 'duration': None, 'state': None, 'start_date': None,
> 'operator': None, 'priority_weight': 2, 'hostname': u'', 'dag_id':
> 'Hello_World_Tasks'}, {'task_id': 'Hello_World_task-24', 'unixname':
> 'ubuntu', 'job_id': None, 'end_date': None, 'pool': None, 'queued_dttm':
> None, 'execution_date': datetime.datetime(2017, 7, 4, 6, 59, 40), 'pid':
> None, 'try_number': 0, 'queue': 'default', 'duration': None, 'state': None,
> 'start_date': None, 'operator': None, 'priority_weight': 2, 'hostname': u'',
> 'dag_id': 'Hello_World_Tasks'}, {'task_id': 'Hello_World_task-27',
> 'unixname': 'ubuntu', 'job_id': None, 'end_date': None, 'pool': None,
> 'queued_dttm': None, 'execution_date': datetime.datetime(2017, 7, 4, 6, 59,
> 40), 'pid': None, 'try_number': 0, 'queue': 'default', 'duration': None,
> 'state': None, 'start_date': None, 'operator': None, 'priority_weight': 2,
> 'hostname': u'', 'dag_id': 'Hello_World_Tasks'}, {'task_id':
> 'Hello_World_task-26', 'unixname': 'ubuntu', 'job_id': None, 'end_date':
> None, 'pool': None, 'queued_dttm': None, 'execution_date':
> datetime.datetime(2017, 7, 4, 6, 59, 40), 'pid': None, 'try_number': 0,
> 'queue': 'default', 'duration': None, 'state': None, 'start_date': None,
> 'operator': None, 'priority_weight': 2, 'hostname': u'', 'dag_id':
> 'Hello_World_Tasks'} ... displaying 10 of 2002 total bound parameter sets
> ... {'task_id': 'Hello_World_task-1783', 'unixname': 'ubuntu', 'job_id':
> None, 'end_date': None, 'pool': None, 'queued_dttm': None, 'execution_date':
> datetime.datetime(2017, 7, 4, 6, 59, 40), 'pid': None, 'try_number': 0,
> 'queue': 'default', 'duration': None, 'state': None, 'start_date': None,
> 'operator': None, 'priority_weight': 2, 'hostname': u'', 'dag_id':
> 'Hello_World_Tasks'}, {'task_id': 'Hello_World_task-1782', 'unixname':
> 'ubuntu', 'job_id': None, 'end_date': None, 'pool': None, 'queued_dttm':
> None, 'execution_date': datetime.datetime(2017, 7, 4, 6, 59, 40), 'pid':
> None, 'try_number': 0, 'queue': 'default', 'duration': None, 'state': None,
> 'start_date': None, 'operator': None, 'priority_weight': 2, 'hostname': u'',
> 'dag_id': 'Hello_World_Tasks'})]
>
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