Varun Vasudev created HDFS-6904:
-----------------------------------
Summary: 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
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
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}
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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