timmylicheng opened a new pull request #678: HDDS-3179 Pipeline placement based on Topology does not have fallback URL: https://github.com/apache/hadoop-ozone/pull/678 ## What changes were proposed in this pull request? When rack awareness and topology is enabled, pipeline placement can fail when there is only one node on the rack. Should add fall back logic to search for nodes from other racks. (Please fill in changes proposed in this fix) ## What is the link to the Apache JIRA https://issues.apache.org/jira/browse/HDDS-3179 (Please create an issue in ASF JIRA before opening a pull request, and you need to set the title of the pull request which starts with the corresponding JIRA issue number. (e.g. HDDS-XXXX. Fix a typo in YYY.) Please replace this section with the link to the Apache JIRA) ## How was this patch tested? UT (Please explain how this patch was tested. Ex: unit tests, manual tests) (If this patch involves UI changes, please attach a screen-shot; otherwise, remove this)
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