[jira] [Closed] (TRAFODION-2623) Port Esgyn DTM changes to Trafodion

["Sean Broeder (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TRAFODION-2623?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Broeder closed TRAFODION-2623.
-----------------------------------

First phase of porting is complete

> Port Esgyn DTM changes to Trafodion
> -----------------------------------
>
>                 Key: TRAFODION-2623
>                 URL: https://issues.apache.org/jira/browse/TRAFODION-2623
>             Project: Apache Trafodion
>          Issue Type: New Feature
>          Components: dtm
>    Affects Versions: 2.2-incubating
>            Reporter: Sean Broeder
>            Assignee: Sean Broeder
>             Fix For: 2.2-incubating
>
>
> There are a very large number of changes present in the DTM components from Esgyn that are not present in Trafodion.  It is not practicable to cherry pick these changes as the two environments are quite different and every cherry pick attempt I tried involved complicated  manual merges.  As a consequence, a large port of DTM changes en masse would be both easier approach and also safer since the Esgyn code has been much more thoroughly tested.
> A sample of the fixes included are:
>  Dozens of bug fixes
>     Improved recovery after HBase failures
>     Better error reporting and tracing, which includes region keys for easier debugging
>     Reduced UnknownTransactionExceptions resulting from duplicate transaction registration
>     Better TLOG management including reducing the default number of tables
> This is the first porting of Esgyn changes.  There will need to be additional , smaller porting effort.  Ultimately the goal is to get the 2 DTM version close enough that cherry picking will become normal and future mass portings will not be necessary. 



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