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From "Chao Sun (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-13475) RBF: Admin cannot enforce Router enter SafeMode
Date Fri, 13 Jul 2018 22:05:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-13475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chao Sun updated HDFS-13475:
----------------------------
    Attachment: HDFS-13475.003.patch

> RBF: Admin cannot enforce Router enter SafeMode
> -----------------------------------------------
>
>                 Key: HDFS-13475
>                 URL: https://issues.apache.org/jira/browse/HDFS-13475
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Wei Yan
>            Assignee: Chao Sun
>            Priority: Major
>         Attachments: HDFS-13475.000.patch, HDFS-13475.001.patch, HDFS-13475.002.patch,
HDFS-13475.003.patch
>
>
> To reproduce the issue: 
> {code:java}
> $ bin/hdfs dfsrouteradmin -safemode enter
> Successfully enter safe mode.
> $ bin/hdfs dfsrouteradmin -safemode get
> Safe Mode: true{code}
> And then, 
> {code:java}
> $ bin/hdfs dfsrouteradmin -safemode get
> Safe Mode: false{code}
> From the code, it looks like the periodicInvoke triggers the leave.
> {code:java}
> public void periodicInvoke() {
> ......
>   // Always update to indicate our cache was updated
>   if (isCacheStale) {
>     if (!rpcServer.isInSafeMode()) {
>       enter();
>     }
>   } else if (rpcServer.isInSafeMode()) {
>     // Cache recently updated, leave safe mode
>     leave();
>   }
> }
> {code}
>  
>  



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