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https://issues.apache.org/jira/browse/HDFS-13972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16819576#comment-16819576
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CR Hota commented on HDFS-13972:
--------------------------------
[~elgoiri] Thanks for the comment.
In terms of testing just this feature, since its not an input/output param, the
only way I tried locally is by refactoring and adding a simple check for method
name. But to prevent erroneous usage of this by developers for other methods
may be tricky.
Is there anything specific you have in mind?
{code:java}
private void setSuperUser(String method) throws IOException {
if ("getDatanodeReport".equals(method)) {
UserGroupInformation loginUser = UserGroupInformation.getLoginUser();
RouterRpcServer.setCurrentUser(loginUser);
}
}
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);
setSuperUser("getDatanodeReport");
DatanodeInfo[] dns = null;
try {
dns = rpcServer.getDatanodeReport(DatanodeReportType.LIVE);
} catch (IOException e) {
LOG.error("Cannot get the datanodes from the RPC server", e);
} finally {
// Reset ugi to remote user for remaining operations.
RouterRpcServer.resetCurrentUser();
}
{code}
> RBF: Support for Delegation Token (WebHDFS)
> -------------------------------------------
>
> Key: HDFS-13972
> URL: https://issues.apache.org/jira/browse/HDFS-13972
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Íñigo Goiri
> Assignee: CR Hota
> Priority: Major
> Attachments: HDFS-13972-HDFS-13891.001.patch,
> HDFS-13972-HDFS-13891.002.patch, HDFS-13972-HDFS-13891.003.patch,
> HDFS-13972-HDFS-13891.004.patch, HDFS-13972-HDFS-13891.005.patch,
> HDFS-13972-HDFS-13891.006.patch, HDFS-13972-HDFS-13891.007.patch,
> HDFS-13972-HDFS-13891.008.patch, HDFS-13972-HDFS-13891.009.patch,
> HDFS-13972-HDFS-13891.010.patch, HDFS-13972-HDFS-13891.011.patch,
> HDFS-13972-HDFS-13891.012.patch, HDFS-13972-HDFS-13891.013.patch,
> TestRouterWebHDFSContractTokens.java
>
>
> HDFS Router should support issuing HDFS delegation tokens through WebHDFS.
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