Phil Yang updated HBASE-17112:
    Fix Version/s: 1.1.8

> Prevent setting timestamp of delta operations the same as previous value's
> --------------------------------------------------------------------------
>                 Key: HBASE-17112
>                 URL: https://issues.apache.org/jira/browse/HBASE-17112
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.1.7, 0.98.23, 1.2.4
>            Reporter: Phil Yang
>            Assignee: Phil Yang
>             Fix For: 2.0.0, 1.4.0, 1.2.5, 1.1.8
>         Attachments: HBASE-17112-branch-1-v1.patch, 
> HBASE-17112-branch-1-v1.patch, HBASE-17112-branch-1.1-v1.patch, 
> HBASE-17112-branch-1.1-v1.patch, HBASE-17112-v1.patch, HBASE-17112-v2.patch, 
> HBASE-17112-v2.patch
> In delta operations, Increment and Append. We will read current value first 
> and then write the new whole result into WAL as the type of Put with current 
> timestamp. If the previous ts is larger than current ts, we will use the 
> previous ts.
> If we have two Puts with same TS, we will ignore the Put with lower sequence 
> id. It is not friendly with versioning. And for replication we will drop 
> sequence id  while writing to peer cluster so in the slave we don't know what 
> the order they are being written. If the pushing is disordered, the result 
> will be wrong.
> We can set the new ts to previous+1 if the previous is not less than now.

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