NickyYe commented on a change in pull request #2080:
URL: https://github.com/apache/hadoop/pull/2080#discussion_r443081834
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File path:
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterWebHdfsMethods.java
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@@ -454,19 +454,12 @@ private URI redirectURI(final Router router, final
UserGroupInformation ugi,
private DatanodeInfo chooseDatanode(final Router router,
final String path, final HttpOpParam.Op op, final long openOffset,
final String excludeDatanodes) throws IOException {
- // We need to get the DNs as a privileged user
final RouterRpcServer rpcServer = getRPCServer(router);
- UserGroupInformation loginUser = UserGroupInformation.getLoginUser();
- RouterRpcServer.setCurrentUser(loginUser);
-
DatanodeInfo[] dns = null;
try {
- dns = rpcServer.getDatanodeReport(DatanodeReportType.LIVE);
+ dns = rpcServer.getCachedDatanodeReport(DatanodeReportType.LIVE);
Review comment:
You are correct. I found this issue also. We could be redirected to a
datanode from a different subcluster where the path is acutually mounted, but
the file would be written to the correct subcluster. We may need to open a new
JIRA for this.
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