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https://issues.apache.org/jira/browse/HDFS-15554?focusedWorklogId=477994&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-477994
]
ASF GitHub Bot logged work on HDFS-15554:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 02/Sep/20 17:31
Start Date: 02/Sep/20 17:31
Worklog Time Spent: 10m
Work Description: goiri commented on a change in pull request #2266:
URL: https://github.com/apache/hadoop/pull/2266#discussion_r482245829
##########
File path:
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterAdminServer.java
##########
@@ -562,11 +595,35 @@ public GetDestinationResponse getDestination(
LOG.error("Cannot get location for {}: {}",
src, ioe.getMessage());
}
- if (nsIds.isEmpty() && !locations.isEmpty()) {
- String nsId = locations.get(0).getNameserviceId();
- nsIds.add(nsId);
+ return nsIds;
+ }
+
+ /**
+ * Verify the file exists in destination nameservices to avoid dangling
+ * mount points.
+ *
+ * @param entry the new mount points added, could be from add or update.
+ * @return destination nameservices where the file doesn't exist.
+ * @throws IOException
+ */
+ private List<String> verifyFileInDestinations(MountTable entry)
Review comment:
I would fix those tests to have those paths existing yes.
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Issue Time Tracking
-------------------
Worklog Id: (was: 477994)
Time Spent: 1h (was: 50m)
> RBF: force router check file existence in destinations before adding/updating
> mount points
> ------------------------------------------------------------------------------------------
>
> Key: HDFS-15554
> URL: https://issues.apache.org/jira/browse/HDFS-15554
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Fengnan Li
> Assignee: Fengnan Li
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Adding/Updating mount points right now is only a router action without
> validation in the downstream namenodes for the destination files/directories.
> In practice we have set up the dangling mount points and when clients call
> listStatus they would get the file returned, but then if they try to access
> the file FileNotFoundException would be thrown out.
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