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https://issues.apache.org/jira/browse/HDFS-10555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15346700#comment-15346700
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Uma Maheswara Rao G commented on HDFS-10555:
--------------------------------------------

Thanks a lot, Kihwal for merging to branch-2. I supposed to do that now. :-)


> Unable to loadFSEdits due to a failure in readCachePoolInfo
> -----------------------------------------------------------
>
>                 Key: HDFS-10555
>                 URL: https://issues.apache.org/jira/browse/HDFS-10555
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>            Reporter: Uma Maheswara Rao G
>            Assignee: Uma Maheswara Rao G
>            Priority: Critical
>             Fix For: 2.9.0
>
>         Attachments: HDFS-10555-00.patch
>
>
> Recently some tests are failing and unable to loadFSEdits due to a failure in 
> readCachePoolInfo.
> Here in below code
> FSImageSerialization.java
> {code}
>   }
>     if ((flags & ~0x2F) != 0) {
>       throw new IOException("Unknown flag in CachePoolInfo: " + flags);
>     }
> {code}
> When all values of CachePool variable set to true, flags value & ~0x2F turns 
> out to non zero value. So, this condition failing due to the addition of 0x20 
>  and changing &ing value from ~0x1F to ~0x2F.
> May be to fix this issue, we may can change multiply value to ~0x3F 



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