LiuGuH commented on code in PR #6784:
URL: https://github.com/apache/hadoop/pull/6784#discussion_r1597405273
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hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterRpc.java:
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@@ -1224,6 +1224,17 @@ public void testProxyConcatFile() throws Exception {
String badPath = "/unknownlocation/unknowndir";
compareResponses(routerProtocol, nnProtocol, m,
new Object[] {badPath, new String[] {routerFile}});
+
+ // Test when concat trg is a empty file
Review Comment:
When srclist has a empty file ,both namenode and dfsrouter will throw the
same IOException
https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirConcatOp.java#L153-L155
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