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Avoid bsub retrying on known error messages
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Contrary to earlier belief in the codebase, returncode 255
does not only mean flaky ssh connection. In order to no retry
on known error scenarios, we must detect them explicitly by string
matcing.
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berland committed Sep 25, 2024
1 parent af60cb0 commit 1c82874
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Showing 3 changed files with 52 additions and 5 deletions.
14 changes: 10 additions & 4 deletions src/ert/scheduler/driver.py
Original file line number Diff line number Diff line change
Expand Up @@ -83,7 +83,8 @@ async def _execute_with_retry(
total_attempts: int = 1,
retry_interval: float = 1.0,
driverlogger: Optional[logging.Logger] = None,
exit_on_msgs: Iterable[str] = (),
return_on_msgs: Iterable[str] = (),
error_on_msgs: Iterable[str] = (),
log_to_debug: Optional[bool] = True,
) -> Tuple[bool, str]:
_logger = driverlogger or logging.getLogger(__name__)
Expand Down Expand Up @@ -121,11 +122,16 @@ async def _execute_with_retry(
f'Command "{shlex.join(cmd_with_args)}" succeeded with {outputs}'
)
return True, stdout.decode(errors="ignore").strip()
elif exit_on_msgs and any(
exit_on_msg in stderr.decode(errors="ignore")
for exit_on_msg in exit_on_msgs
elif return_on_msgs and any(
return_on_msg in stderr.decode(errors="ignore")
for return_on_msg in return_on_msgs
):
return True, stderr.decode(errors="ignore").strip()
elif error_on_msgs and any(
error_on_msg in stderr.decode(errors="ignore")
for error_on_msg in error_on_msgs
):
return False, stderr.decode(errors="ignore").strip()
elif process.returncode in retry_codes:
error_message = outputs
elif process.returncode in accept_codes:
Expand Down
4 changes: 3 additions & 1 deletion src/ert/scheduler/lsf_driver.py
Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,7 @@ class RunningJob:
LSF_INFO_JSON_FILENAME = "lsf_info.json"
FLAKY_SSH_RETURNCODE = 255
JOB_ALREADY_FINISHED_BKILL_MSG = "Job has already finished"
BSUB_FAILURE_MESSAGES = ("Job not submitted",)


def _parse_jobs_dict(jobs: Mapping[str, JobState]) -> dict[str, AnyJob]:
Expand Down Expand Up @@ -340,6 +341,7 @@ async def submit(
retry_codes=(FLAKY_SSH_RETURNCODE,),
total_attempts=self._bsub_retries,
retry_interval=self._sleep_time_between_cmd_retries,
error_on_msgs=BSUB_FAILURE_MESSAGES,
)
if not process_success:
self._job_error_message_by_iens[iens] = process_message
Expand Down Expand Up @@ -392,7 +394,7 @@ async def kill(self, iens: int) -> None:
retry_codes=(FLAKY_SSH_RETURNCODE,),
total_attempts=3,
retry_interval=self._sleep_time_between_cmd_retries,
exit_on_msgs=(JOB_ALREADY_FINISHED_BKILL_MSG),
return_on_msgs=(JOB_ALREADY_FINISHED_BKILL_MSG),
)
await asyncio.create_subprocess_shell(
f"sleep {self._sleep_time_between_bkills}; {self._bkill_cmd} -s SIGKILL {job_id}",
Expand Down
39 changes: 39 additions & 0 deletions tests/unit_tests/scheduler/test_lsf_driver.py
Original file line number Diff line number Diff line change
Expand Up @@ -560,6 +560,45 @@ async def test_that_bsub_will_retry_and_fail(
await driver.submit(0, "sleep 10")


@pytest.mark.parametrize(
("exit_code, error_msg"),
[
# All these have been manually obtained on the command line by perturbing the command arguments to bsub:
(255, "No such queue. Job not submitted"),
(255, "Too many processors requested. Job not submitted."),
(255, 'Error near "select" : duplicate section. Job not submitted.'),
(
255,
"Error in select section: Expected number, string, "
'name, or "(" but found end of section. Job not submitted.',
),
(
255,
"Error with <select[rhel < 8 && cs & x86_64Linux] rusage[mem=50]>:"
" '&' cannot be used in the resource requirement section. Job not submitted.",
),
(255, "Error in rusage section. Job not submitted."),
(255, "Job not submitted."),
],
)
async def test_that_bsub_will_fail_without_retries(
monkeypatch, tmp_path, exit_code, error_msg
):
monkeypatch.chdir(tmp_path)
bin_path = Path("bin")
bin_path.mkdir()
monkeypatch.setenv("PATH", f"{bin_path}:{os.environ['PATH']}")
bsub_path = bin_path / "bsub"
bsub_path.write_text(
f'#!/bin/sh\necho . >> bsubcalls\necho "{error_msg}" >&2\nexit {exit_code}'
)
bsub_path.chmod(bsub_path.stat().st_mode | stat.S_IEXEC)
driver = LsfDriver()
with pytest.raises(RuntimeError):
await driver.submit(0, "sleep 10")
assert len(Path("bsubcalls").read_text(encoding="utf-8").strip()) == 1


@pytest.mark.parametrize(
("exit_code, error_msg"),
[
Expand Down

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