Gargi-jais11 commented on code in PR #9318:
URL: https://github.com/apache/ozone/pull/9318#discussion_r2548831144
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hadoop-hdds/framework/src/main/java/org/apache/hadoop/hdds/utils/HddsServerUtil.java:
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@@ -422,7 +422,7 @@ public static Collection<String>
getOzoneDatanodeRatisDirectory(
if (rawLocations.isEmpty()) {
rawLocations = new ArrayList<>(1);
- rawLocations.add(ServerUtils.getDefaultRatisDirectory(conf));
+ rawLocations.add(ServerUtils.getDefaultRatisDirectory(conf, "dn"));
Review Comment:
I think the **DataNode UUID** cannot be used because if I am not wrong from
the code flow it apprears:
```
First time DataNode starts on a fresh system :
UUID is generated randomly (not on disk)
Ratis directory created: /data/metadata/dn.ratis
DataNode crashes before UUID is persisted
On restart → NEW random UUID generated
❌ If we used UUID in path → would look for /data/metadata/NEW_UUID.ratis
❌ All previous Ratis data lost!
```
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