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From "Guanghao Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19359) Revisit the default config of hbase client retries number
Date Fri, 29 Dec 2017 03:27:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16305942#comment-16305942
] 

Guanghao Zhang commented on HBASE-19359:
----------------------------------------

bq. So, leave it at 10 retries and change the backoff intervals?
15 is ok, sir :-). Let's keep the current backoff interval and use the 15 as default retry
number now. Because the real exponential backoff may be too long for user. And another important
thing is the backoff should work with operation timeout. But now the operation timeout still
confused (See HBASE-17449)... We should have a clear rule about the timeout and retry: A operation
will failed unless reach the retry limit or reach the operation timeout limit. If we can make
sure this, I thought it is ok to change the default backoff to a "real exponential backoff"
and add some special retry backoff for special case. Even the retry backoff is long for user,
user still can control this by operation timeout.

> Revisit the default config of hbase client retries number
> ---------------------------------------------------------
>
>                 Key: HBASE-19359
>                 URL: https://issues.apache.org/jira/browse/HBASE-19359
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Guanghao Zhang
>            Assignee: Guanghao Zhang
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-19359.master.001.patch, HBASE-19359.master.001.patch, HBASE-19359.master.001.patch
>
>
> This should be sub-task of HBASE-19148. As the retries number effect too many unit tests.
So I open this issue to see the Hadoop QA result.
> The default value of hbase.client.retries.number is 35. Plan to reduce this to 10.
> And for server side, the default hbase.client.serverside.retries.multiplier is 10. So
the server side retries number is 35 * 10 = 350. It is too big! Plan to reduce hbase.client.serverside.retries.multiplier
to 3.



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