Ryan Yuan created AIRFLOW-3326:
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Summary: High Sierra Complaining 'in progress in another thread
when fork() was called'
Key: AIRFLOW-3326
URL: https://issues.apache.org/jira/browse/AIRFLOW-3326
Project: Apache Airflow
Issue Type: Bug
Affects Versions: 1.10.0
Environment: macOS High Sierra 10.13.6 (17G65)
Reporter: Ryan Yuan
Assignee: Ryan Yuan
Inside the plugins folder, I have a hook that is a child class of BigQueryHook.
{code:java}
// code
from airflow.contrib.hooks.bigquery_hook import BigQueryHook
class BQHook(BigQueryHook):
pass{code}
When I run the airflow server, it keeps throwing messages complaining 'in
progress in another thread when fork() was called', and I can't use the web
server UI at all.
{code:java}
// messages from terminal
objc[15098]: +[__NSPlaceholderDate initialize] may have been in progress in
another thread when fork() was called.
objc[15098]: +[__NSPlaceholderDate initialize] may have been in progress in
another thread when fork() was called. We cannot safely call it or ignore it in
the fork() child process. Crashing instead. Set a breakpoint on
objc_initializeAfterForkError to debug.
[2018-11-12 14:03:40 +1100] [15102] [INFO] Booting worker with pid: 15102
[2018-11-12 14:03:40,792] {__init__.py:51} INFO - Using executor
SequentialExecutor
[2018-11-12 14:03:40,851] {base_hook.py:83} INFO - Using connection to:
https://custom-data-z00100-dev.appspot.com/
objc[15099]: +[__NSPlaceholderDate initialize] may have been in progress in
another thread when fork() was called.
objc[15099]: +[__NSPlaceholderDate initialize] may have been in progress in
another thread when fork() was called. We cannot safely call it or ignore it in
the fork() child process. Crashing instead. Set a breakpoint on
objc_initializeAfterForkError to debug.
[2018-11-12 14:03:40 +1100] [15103] [INFO] Booting worker with pid: 15103
[2018-11-12 14:03:40,902] {base_hook.py:83} INFO - Using connection to:
https://custom-data-z00100-dev.appspot.com/
objc[15101]: +[__NSPlaceholderDate initialize] may have been in progress in
another thread when fork() was called.
objc[15101]: +[__NSPlaceholderDate initialize] may have been in progress in
another thread when fork() was called. We cannot safely call it or ignore it in
the fork() child process. Crashing instead. Set a breakpoint on
objc_initializeAfterForkError to debug.
[2018-11-12 14:03:40 +1100] [15104] [INFO] Booting worker with pid: 15104
[2018-11-12 14:03:40,948] {base_hook.py:83} INFO - Using connection to:
https://custom-data-z00100-dev.appspot.com/
objc[15100]: +[__NSPlaceholderDate initialize] may have been in progress in
another thread when fork() was called.
objc[15100]: +[__NSPlaceholderDate initialize] may have been in progress in
another thread when fork() was called. We cannot safely call it or ignore it in
the fork() child process. Crashing instead. Set a breakpoint on
objc_initializeAfterForkError to debug.
{code}
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