42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
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import traceback as tb
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from typing import Any, Dict, Tuple
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WRAPPED_EXCEPTION = Tuple[BaseException, tb.StackSummary]
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__all__ = ["CheckpointException"]
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def _wrap_exception(exc: BaseException) -> WRAPPED_EXCEPTION:
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return (exc, tb.extract_tb(exc.__traceback__))
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def _is_wrapped_exception(obj: Any) -> bool:
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if not isinstance(obj, tuple):
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return False
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if len(obj) != 2:
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return False
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return isinstance(obj[0], BaseException) and isinstance(obj[1], tb.StackSummary)
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class CheckpointException(BaseException):
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"""Exception raised if failure was detected as part of a checkpoint load or save."""
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def __init__(self, msg: str, failures: Dict[int, WRAPPED_EXCEPTION]):
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super().__init__(msg, failures)
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self._failures = failures
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@property
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def failures(self) -> Dict[int, WRAPPED_EXCEPTION]:
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"""Return a dictionary mapping node ranks to their associated exceptions in case of failure."""
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return self._failures
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def __str__(self):
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str = f"CheckpointException ranks:{self._failures.keys()}\n"
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for rank, exc_pair in self._failures.items():
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exc, trace = exc_pair
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str += f"Traceback (most recent call last): (RANK {rank})\n"
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if trace is not None:
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str += "".join(tb.format_list(trace))
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str += "".join(tb.format_exception_only(type(exc), value=exc))
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return str
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