jrushford opened a new pull request #2970: Add an exponential time backoff object for use in traffic_monitor. URL: https://github.com/apache/trafficcontrol/pull/2970 #### What does this PR do? Fixes #(issue_number) #### Which TC components are affected by this PR? Adds a simple exponential time duration calculator for use in Traffic Monitor's retry logic used when TrafficOps is down and Traffic Monitor is starting. Instead of retrying at a fixed interval, Traffic Monitor retries using an exponentially increasing backoff interval. - [ ] Documentation - [ ] Grove - [ ] Traffic Analytics - [x] Traffic Monitor - [ ] Traffic Ops - [ ] Traffic Ops ORT - [ ] Traffic Portal - [ ] Traffic Router - [ ] Traffic Stats - [ ] Traffic Vault - [ ] Other _________ #### What is the best way to verify this PR? Start up Traffic Monitor while TrafficOps is down, in the Traffic Monitor logs, observer that Traffic Monitor retries with increasing retry times until a max time duration is reached at which point it goes from the lowest to maximum retry interval again. Once Traffic Ops is available, Traffic Monitor should connect and begin normal processing. #### Check all that apply - [X] This PR includes tests - [ ] This PR includes documentation updates - [ ] This PR includes an update to CHANGELOG.md - [ ] This PR includes all required license headers - [ ] This PR includes a database migration (ensure that migration sequence is correct) - [ ] This PR fixes a serious security flaw. Read more: [www.apache.org/security](http://www.apache.org/security/) <!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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. -->
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