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https://issues.apache.org/jira/browse/HBASE-27030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junegunn Choi reassigned HBASE-27030:
-------------------------------------
Assignee: Junegunn Choi
> Fix undefined local variable error in draining_servers.rb
> ---------------------------------------------------------
>
> Key: HBASE-27030
> URL: https://issues.apache.org/jira/browse/HBASE-27030
> Project: HBase
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha-3
> Reporter: Junegunn Choi
> Assignee: Junegunn Choi
> Priority: Major
>
> HBASE-21812 replaced a for-loop with an each block. Each block introduces a
> new scope, so a local variable defined inside it cannot be accessed
> afterwards.
> {quote}
> NameError: undefined local variable or method `admin' for main:Object
> getServerNames at /opt/khp/hbase/bin/draining_servers.rb:81
> addServers at /opt/khp/hbase/bin/draining_servers.rb:88
> <main> at /opt/khp/hbase/bin/draining_servers.rb:146
> {quote}
>
> {code:java}
> for i in [1, 2, 3]
> a = i
> end
> puts a
> # 3
> [4, 5, 6].each do |i|
> b = i
> end
> puts b
> # undefined local variable or method `b'
> {code}
> We can define the admin local variable in the current scope beforehand, and
> we can still access it after the block.
>
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