/
train_util.go
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/
train_util.go
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// Copyright 2018 The Kubeflow Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package that various helper routines for training.
package train
import (
"k8s.io/apimachinery/pkg/util/sets"
)
func IsRetryableExitCode(exitCode int32) bool {
if exitCode == 1 || exitCode == 2 || exitCode == 126 ||
exitCode == 127 || exitCode == 128 || exitCode == 139 {
// Refers to http://tldp.org/LDP/abs/html/exitcodes.html, we identify the following exit codes
// as permanent errors:
// 1: General errors
// 2: Misuse of shell builtins
// 126: Command invoked cannot execute
// 127: Command not found
// 128: Invalid argument to exit
// 139(128+11): terminated by SIGSEGV(Invalid memory reference)
return false
}
if exitCode == 130 || exitCode == 137 || exitCode == 143 {
// We think it's retryable error if the container exits due to the following sys signals
// that are usually caused by transient issues(e.g. VM was rescheduled):
// 130(128+2): Container terminated by Control-C
// 137(128+9): Container received a SIGKILL
// 143(128+15): Container received a SIGTERM
// The exit code of container will be 128 + n for fatal error signals.
// More info can be found in:
// http://tldp.org/LDP/abs/html/exitcodes.html,
// https://stackoverflow.com/questions/31297616/what-is-the-authoritative-list-of-docker-run-exit-codes
return true
}
if exitCode == 138 {
// We allow users to specify exit code for the cases that they think should retry.
// We decide to take the exit code of SIGUSR1(138 = 128 + 10) for user defined retryable error.
return true
}
// We make no guarantee for other exit status. Currently handling them same as permanent errors.
return false
}
// failed pod due to certain reasons is retryable, i.e., rescheduled to resume the job
func IsRetryablePodFailedReason(reason string) bool {
return sets.NewString(
// potential pod failed known reasons that can be fail-overed.
"OOMKilled", "Killed", "Evicted", "UnexpectedAdmissionError",
).Has(reason)
}