[jira] [Updated] (HADOOP-18881) ZKDTSM could be stuck when meet znode version overflow

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-18881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HADOOP-18881:
------------------------------------
    Labels: pull-request-available  (was: )

> ZKDTSM could be stuck when meet znode version overflow
> ------------------------------------------------------
>
>                 Key: HADOOP-18881
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18881
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Xiaoqiao He
>            Assignee: Xiaoqiao He
>            Priority: Critical
>              Labels: pull-request-available
>
> ZKDTSM could be stuck when meet znode (/zkdtsm/ZKDTSMRoot/ZKDTSMSeqNumRoot) version int overflow (2147483647). It can not recovery even restart Application which may include YARN Router, DFS Router, KMS and other modules who use zookeeper to manage Token. One solution (not very smooth) is delete this znode first and then restart Service.
> The root cause is following code snippet and curator could not compatible with version overflow. I try to give a draft improvement at CURATOR-688. Welcome to any discussion if we could resolve it at Hadoop side smooth.
> org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager#incrSharedCount
> {code:java}
>   private int incrSharedCount(SharedCount sharedCount, int batchSize)
>       throws Exception {
>     while (true) {
>       // Loop until we successfully increment the counter
>       VersionedValue<Integer> versionedValue = sharedCount.getVersionedValue();
>       if (sharedCount.trySetCount(
>           versionedValue, versionedValue.getValue() + batchSize)) {
>         return versionedValue.getValue();
>       }
>     }
>   }
> {code}



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