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https://issues.apache.org/jira/browse/HBASE-20276?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Busbey updated HBASE-20276:
--------------------------------
Resolution: Fixed
Hadoop Flags: Incompatible change
Release Note:
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The HBase shell now behaves as it did prior to the changes that started in
HBASE-15965. Namely, some shell commands return values that may be further
manipulated within the shell's IRB session.
The command line option `--return-values` is no longer acted on by the shell
since it now always behaves as it did when passed this parameter. Passing the
option results in a harmless warning about this change.
Users who wish to maintain the behavior seen in the 1.4.0-1.4.2 releases of the
HBase shell should refer to the section _irbrc_ in the reference guide for how
to configure their IRB session to avoid echoing expression results to the
console.
Status: Resolved (was: Patch Available)
pushed to branch-1.4+. Marking as incompatible since we're ignoring the flag
and in theory folks in the 1.4.0-1.4.2 range could have started checking that
we return `nil` from commands (e.g. to figure out if we're in interactive mode
or not).
> [shell] Revert shell REPL change and document
> ---------------------------------------------
>
> Key: HBASE-20276
> URL: https://issues.apache.org/jira/browse/HBASE-20276
> Project: HBase
> Issue Type: Sub-task
> Components: documentation, shell
> Affects Versions: 1.4.0, 2.0.0
> Reporter: Sean Busbey
> Assignee: Sean Busbey
> Priority: Blocker
> Fix For: 1.4.4, 2.0.0
>
> Attachments: HBASE-20276.0.patch, HBASE-20276.1.patch,
> HBASE-20276.2.patch, HBASE-20276.3.patch
>
>
> Feedback from [~mdrob] on HBASE-19158:
> {quote}
> Shell:
> HBASE-19770. There was another issue opened where this was identified as a
> problem so maybe the shape will change further, but I can't find it now.
> {quote}
> New commentary from [~busbey]:
> This was a follow on to HBASE-15965. That change effectively makes it so none
> of our ruby wrappers can be used to build expressions in an interactive REPL.
> This is a pretty severe change (most of my tips on HBASE-15611 will break, I
> think).
> I think we should
> a) Have a DISCUSS thread, spanning dev@ and user@
> b) based on the outcome of that thread, either default to the new behavior or
> the old behavior
> c) if we keep the HBASE-15965 behavior as the default, flag it as
> incompatible, call it out in the hbase 2.0 upgrade section, and update docs
> (two examples: the output in the shell_exercises sections would be wrong, and
> the _table_variables section won't work)
> d) In either case document the new flag in the ref guide
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