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https://issues.apache.org/jira/browse/HBASE-22387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16837386#comment-16837386
]
Zheng Hu commented on HBASE-22387:
----------------------------------
The balancer command was broken now:
{code}
hbase(main):001:0> balancer
(eval):3: warning: instance variable @shell not initialized
Exception `NoMethodError' at (eval):2 - undefined method `command' for
nil:NilClass
ERROR: undefined method `command' for nil:NilClass
Backtrace: (eval):2:in `balancer'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/lib/ruby/hbase/admin.rb:192:in
`balancer'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/lib/ruby/shell/commands/balancer.rb:47:in
`command'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/lib/ruby/shell/commands.rb:49:in
`block in command_safe'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/lib/ruby/shell/commands.rb:122:in
`translate_hbase_exceptions'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/lib/ruby/shell/commands.rb:49:in
`command_safe'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/lib/ruby/shell.rb:148:in
`internal_command'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/lib/ruby/shell.rb:140:in
`command'
(eval):2:in `balancer'
(hbase):1:in `<eval>'
org/jruby/RubyKernel.java:994:in `eval'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/irb/workspace.rb:87:in
`evaluate'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/irb/context.rb:380:in
`evaluate'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/irb.rb:489:in
`block in eval_input'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/irb.rb:623:in
`signal_status'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/irb.rb:486:in
`block in eval_input'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/irb/ruby-lex.rb:246:in
`block in each_top_level_statement'
org/jruby/RubyKernel.java:1292:in `loop'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/irb/ruby-lex.rb:232:in
`block in each_top_level_statement'
org/jruby/RubyKernel.java:1114:in `catch'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/irb/ruby-lex.rb:231:in
`each_top_level_statement'
uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/irb.rb:485:in
`eval_input'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/bin/hirb.rb:214:in
`block in start'
org/jruby/RubyKernel.java:1114:in `catch'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/bin/hirb.rb:213:in
`start'
/home/huzheng/.minos/packages/hbase/7b5bccdecd0600d98ad9a28d826e289fb6d58f46-20190510-165336/hbase-3.0.0-SNAPSHOT/bin/hirb.rb:219:in
`<main>'
For usage try 'help "balancer"'
Took 0.1378 seconds
hbase(main):002:0>
{code}
> Evaluate the get/scan performance after reading HFile block into offheap
> directly
> ---------------------------------------------------------------------------------
>
> Key: HBASE-22387
> URL: https://issues.apache.org/jira/browse/HBASE-22387
> Project: HBase
> Issue Type: Sub-task
> Reporter: Zheng Hu
> Assignee: Zheng Hu
> Priority: Major
>
> Now, all sub-tasks has been resolved now (except the HBASE-21946 because of
> the hadoop dependency problem), will provide some performance benckmarks to
> show the latency improvement.
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