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https://issues.apache.org/jira/browse/HDFS-5322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13789456#comment-13789456
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Suresh Srinivas commented on HDFS-5322:
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# You can make retrievePassword method shorter by {{return
checkToken().getPassword();}}. Please add assert for ensuring the method is
synchronized and document it in the method javadoc.
# Can you refactor HDFS DelegationTokenSecretManager#checkToken to smaller
methods? Also can you check for isTransitionToActive() only if the token in the
cache is null?
# " is expired" -> " has expired"
# startingActiveService - does it need to be volatile. We can just use it with
in lock, right?
# When reviewing the code, I found this hack. Given this, do you see any issue
in the way we are changing the method signature? I do not and cannot understand
why this hack was added. If you think this hack is not necessary, lets remove
it in another jira.
{code}
// FIXME: this is a hack to get around changing method signatures by
// tunneling a non-InvalidToken exception as the cause which the
// RPC server will unwrap before returning to the client
InvalidToken wrappedStandby = new InvalidToken("StandbyException");
wrappedStandby.initCause(se);
throw wrappedStandby;
{code}
> HDFS delegation token not found in cache errors seen on secure HA clusters
> --------------------------------------------------------------------------
>
> Key: HDFS-5322
> URL: https://issues.apache.org/jira/browse/HDFS-5322
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha
> Affects Versions: 2.1.1-beta
> Reporter: Arpit Gupta
> Assignee: Jing Zhao
> Attachments: HDFS-5322.000.patch, HDFS-5322.000.patch
>
>
> While running HA tests we have seen issues were we see HDFS delegation token
> not found in cache errors causing jobs running to fail.
> {code}
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)
> |2013-10-06 20:14:51,193 INFO [main] mapreduce.Job: Task Id :
> attempt_1381090351344_0001_m_000007_0, Status : FAILED
> Error:
> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.token.SecretManager$InvalidToken):
> token (HDFS_DELEGATION_TOKEN token 11 for hrt_qa) can't be found in cache
> at org.apache.hadoop.ipc.Client.call(Client.java:1347)
> at org.apache.hadoop.ipc.Client.call(Client.java:1300)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)
> at com.sun.proxy.$Proxy10.getBlockLocations(Unknown Source)
> {code}
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