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https://issues.apache.org/jira/browse/HDFS-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14136617#comment-14136617
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Yi Liu commented on HDFS-6904:
------------------------------
Hi [~vvasudev], that's just the exception msg, not meaning WebHDFS client renew
delegation token through NN RPC server directly. It does rest call to NN http
server, and just the NN http server calls to FSN to renew delegation token. We
can get correct information from the call stack.
In NN, for delegation token, there is only one place to generate/renew
delegation token, that's in FSN. NN Http server just receives the renew
delegation token request, but it call into FSN (through NameNodeRpcServer
method) to do real work.
> YARN unable to renew delegation token fetched via webhdfs due to incorrect
> service port
> ---------------------------------------------------------------------------------------
>
> Key: HDFS-6904
> URL: https://issues.apache.org/jira/browse/HDFS-6904
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: webhdfs
> Reporter: Varun Vasudev
> Assignee: Haohui Mai
> Priority: Critical
>
> YARN is unable to renew delegation tokens obtained via the WebHDFS REST API.
> The scenario is as follows -
> 1. User creates a delegation token using the WebHDFS REST API
> 2. User passes this token to YARN as part of app submission(via the YARN REST
> API)
> 3. When YARN tries to renew this delegation token, it fails because the token
> service is pointing to the RPC port but the token kind is WebHDFS.
> The exception is
> {noformat}
> 2014-08-19 03:12:54,733 WARN security.DelegationTokenRenewer
> (DelegationTokenRenewer.java:handleDTRenewerAppSubmitEvent(661)) - Unable to
> add the application to the delegation token renewer.
> java.io.IOException: Failed to renew token: Kind: WEBHDFS delegation,
> Service: NameNodeIP:8020, Ident: (WEBHDFS delegation token 2222 for hrt_qa)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer.handleAppSubmitEvent(DelegationTokenRenewer.java:394)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer.access$5(DelegationTokenRenewer.java:357)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer$DelegationTokenRenewerRunnable.handleDTRenewerAppSubmitEvent(DelegationTokenRenewer.java:657)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer$DelegationTokenRenewerRunnable.run(DelegationTokenRenewer.java:638)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.io.IOException: Unexpected HTTP response: code=-1 != 200,
> op=RENEWDELEGATIONTOKEN, message=null
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem.validateResponse(WebHdfsFileSystem.java:331)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem.access$200(WebHdfsFileSystem.java:90)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.runWithRetry(WebHdfsFileSystem.java:598)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.access$100(WebHdfsFileSystem.java:448)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner$1.run(WebHdfsFileSystem.java:477)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.run(WebHdfsFileSystem.java:473)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem.renewDelegationToken(WebHdfsFileSystem.java:1318)
> at
> org.apache.hadoop.hdfs.web.TokenAspect$TokenManager.renew(TokenAspect.java:73)
> at org.apache.hadoop.security.token.Token.renew(Token.java:377)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer$1.run(DelegationTokenRenewer.java:477)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer$1.run(DelegationTokenRenewer.java:1)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer.renewToken(DelegationTokenRenewer.java:473)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer.handleAppSubmitEvent(DelegationTokenRenewer.java:392)
> ... 6 more
> Caused by: java.io.IOException: The error stream is null.
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem.jsonParse(WebHdfsFileSystem.java:304)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem.validateResponse(WebHdfsFileSystem.java:329)
> ... 24 more
> 2014-08-19 03:12:54,735 DEBUG event.AsyncDispatcher
> (AsyncDispatcher.java:dispatch(164)) - Dispatching the event
> org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppRejectedEvent.EventType:
> APP_REJECTED
> {noformat}
> I suspect the issue is that the Namenode generates a delegation token of kind
> WebHDFS but doesn't change the service port. When YARN tries to renew the
> delegation token, it ends up trying to contact WebHDFS on the RPC port.
> From NamenodeWebHdfsMethods.java
> {noformat}
> case GETDELEGATIONTOKEN:
> {
> if (delegation.getValue() != null) {
> throw new IllegalArgumentException(delegation.getName()
> + " parameter is not null.");
> }
> final Token<? extends TokenIdentifier> token = generateDelegationToken(
> namenode, ugi, renewer.getValue());
> final String js = JsonUtil.toJsonString(token);
> return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
> }
> {noformat}
> which in turn calls
> {noformat}
> private Token<? extends TokenIdentifier> generateDelegationToken(
> final NameNode namenode, final UserGroupInformation ugi,
> final String renewer) throws IOException {
> final Credentials c = DelegationTokenSecretManager.createCredentials(
> namenode, ugi, renewer != null? renewer: ugi.getShortUserName());
> final Token<? extends TokenIdentifier> t =
> c.getAllTokens().iterator().next();
> Text kind = request.getScheme().equals("http") ?
> WebHdfsFileSystem.TOKEN_KIND
> : SWebHdfsFileSystem.TOKEN_KIND;
> t.setKind(kind);
> return t;
> }
> {noformat}
> The command we used to get the delegation token is -
> {noformat}
> curl -i -k -s --negotiate -u :
> 'http://NameNodeHost:50070/webhdfs/v1?op=GETDELEGATIONTOKEN&renewer=yarn'
> {noformat}
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