karunpoudel-chr commented on issue #36998:
URL: https://github.com/apache/airflow/issues/36998#issuecomment-2066762929
I am seeing issue in single namespace.
airflow==2.8.4
apache-airflow-providers-cncf-kubernetes==7.14.0
kubernetes==23.6.0
`KubernetesJobWatcher` failed a couple times but it was able to restart.
In the logs below, the Watcher running on PID: 2034 failed. On the next sync
of the executor, it was able to start back with PID: 3740.
```
[2024-04-18T23:29:34.285+0000] [2034:139691425343296]
{airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py:121}
ERROR - Unknown error in KubernetesJobWatcher. Failing
Traceback (most recent call last):
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
710, in _error_catcher
yield
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
1073, in read_chunked
self._update_chunk_length()
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
1008, in _update_chunk_length
raise InvalidChunkLength(self, line) from None
urllib3.exceptions.InvalidChunkLength: InvalidChunkLength(got length b'', 0
bytes read)
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File
"/usr/local/lib/python3.11/site-packages/airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py",
line 112, in run
self.resource_version = self._run(
^^^^^^^^^^
File
"/usr/local/lib/python3.11/site-packages/airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py",
line 168, in _run
for event in self._pod_events(kube_client=kube_client,
query_kwargs=kwargs):
File "/usr/local/lib/python3.11/site-packages/kubernetes/watch/watch.py",
line 165, in stream
for line in iter_resp_lines(resp):
File "/usr/local/lib/python3.11/site-packages/kubernetes/watch/watch.py",
line 56, in iter_resp_lines
for seg in resp.stream(amt=None, decode_content=False):
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
933, in stream
yield from self.read_chunked(amt, decode_content=decode_content)
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
1061, in read_chunked
with self._error_catcher():
File "/usr/local/lib/python3.11/contextlib.py", line 158, in __exit__
self.gen.throw(typ, value, traceback)
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
727, in _error_catcher
raise ProtocolError(f"Connection broken: {e!r}", e) from e
urllib3.exceptions.ProtocolError: ("Connection broken:
InvalidChunkLength(got length b'', 0 bytes read)", InvalidChunkLength(got
length b'', 0 bytes read))
Process KubernetesJobWatcher-5:
Traceback (most recent call last):
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
710, in _error_catcher
yield
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
1073, in read_chunked
self._update_chunk_length()
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
1008, in _update_chunk_length
raise InvalidChunkLength(self, line) from None
urllib3.exceptions.InvalidChunkLength: InvalidChunkLength(got length b'', 0
bytes read)
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/local/lib/python3.11/multiprocessing/process.py", line 314, in
_bootstrap
self.run()
File
"/usr/local/lib/python3.11/site-packages/airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py",
line 112, in run
self.resource_version = self._run(
^^^^^^^^^^
File
"/usr/local/lib/python3.11/site-packages/airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py",
line 168, in _run
for event in self._pod_events(kube_client=kube_client,
query_kwargs=kwargs):
File "/usr/local/lib/python3.11/site-packages/kubernetes/watch/watch.py",
line 165, in stream
for line in iter_resp_lines(resp):
File "/usr/local/lib/python3.11/site-packages/kubernetes/watch/watch.py",
line 56, in iter_resp_lines
for seg in resp.stream(amt=None, decode_content=False):
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
933, in stream
yield from self.read_chunked(amt, decode_content=decode_content)
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
1061, in read_chunked
with self._error_catcher():
File "/usr/local/lib/python3.11/contextlib.py", line 158, in __exit__
self.gen.throw(typ, value, traceback)
File "/usr/local/lib/python3.11/site-packages/urllib3/response.py", line
727, in _error_catcher
raise ProtocolError(f"Connection broken: {e!r}", e) from e
urllib3.exceptions.ProtocolError: ("Connection broken:
InvalidChunkLength(got length b'', 0 bytes read)", InvalidChunkLength(got
length b'', 0 bytes read))
[2024-04-18T23:29:35.067+0000] [ 7:139691425343296]
{airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py:449}
DEBUG - Syncing KubernetesExecutor
[2024-04-18T23:29:35.067+0000] [ 7:139691425343296]
{airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py:359}
ERROR - Error while health checking kube watcher process for namespace
astronomer-contractual-po-prod. Process died for unknown reasons
[2024-04-18T23:29:35.078+0000] [3740:139691425343296]
{airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py:157}
INFO - Event: and now my watch begins starting at resource_version: 0
```
I was working fine for a minute; it was reporting back the pod changes.
```
[2024-04-18T23:30:50.605+0000] [3740:139691425343296]
{airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py:170}
DEBUG - Event: strategizer-monitor-check-strategizer-bid-statuses-lz2ww1cv had
an event of type DELETED
[2024-04-18T23:30:50.605+0000] [3740:139691425343296]
{airflow/providers/cncf/kubernetes/executors/kubernetes_executor_utils.py:256}
INFO - Skipping event for Succeeded pod
strategizer-monitor-check-strategizer-bid-statuses-lz2ww1cv - event for this
pod already sent to executor
```
After this the Watcher went silent, no logs with PID 3740.
KubernetesExecuter.running set kept increasing:
```
[2024-04-18T23:40:01.059+0000] [ 7:139691425343296]
{airflow/executors/base_executor.py:217} DEBUG - 1 running task instances
[2024-04-18T23:40:01.060+0000] [ 7:139691425343296]
{airflow/executors/base_executor.py:218} DEBUG - 0 in queue
[2024-04-18T23:40:01.060+0000] [ 7:139691425343296]
{airflow/executors/base_executor.py:219} DEBUG - 31 open slots
...
[2024-04-19T13:24:44.721+0000] [ 7:139691425343296]
{airflow/executors/base_executor.py:217} DEBUG - 32 running task instances
[2024-04-19T13:24:44.721+0000] [ 7:139691425343296]
{airflow/executors/base_executor.py:218} DEBUG - 0 in queue
[2024-04-19T13:24:44.721+0000] [ 7:139691425343296]
{airflow/executors/base_executor.py:219} DEBUG - 0 open slots
```
I confirmed that the PID: 3740 is still running.
```
/usr/local/airflow$ ps -ef
UID PID PPID C STIME TIME CMD
astro 1 0 0 Apr18 00:00:00 tini -- /entrypoint bash -c exec airflow
scheduler
astro 7 1 4 Apr18 00:37:17 /usr/local/bin/python
/usr/local/bin/airflow scheduler
astro 24 7 0 Apr18 00:01:06 /usr/local/bin/python
/usr/local/bin/airflow scheduler
astro 33 7 0 Apr18 00:00:41 /usr/local/bin/python
/usr/local/bin/airflow scheduler
astro 44 7 1 Apr18 00:12:28 airflow scheduler -- DagFileProcessorManager
astro 740 7 0 Apr18 00:00:00 /usr/local/bin/python
/usr/local/bin/airflow scheduler <=== KubernetesJobWatcher
```
So, it may not be getting any pod events back from Kubernetes, even though
pods are being created and completed.
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