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https://issues.apache.org/jira/browse/HBASE-18054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16033925#comment-16033925
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Andrew Purtell commented on HBASE-18054:
----------------------------------------

bq. Thanks. Now let's look at the patch.

{code}
51          if (LOG.isDebugEnabled()) {
52            LOG.debug("Added failed server with address " + 
address.toString() + " to list");
53          }
{code}

This doesn't tell us more than we can deduce by a later log indicating the 
server is in the failed server list. We should add why the server has been 
added to the failed server list. Perhaps addToFailedServers() should get a new 
additional argument, a string containing the reason, that all callers can 
supply?  

> log when we add/remove failed servers in client
> -----------------------------------------------
>
>                 Key: HBASE-18054
>                 URL: https://issues.apache.org/jira/browse/HBASE-18054
>             Project: HBase
>          Issue Type: Bug
>          Components: Client, Operability
>    Affects Versions: 1.3.0
>            Reporter: Sean Busbey
>            Assignee: Ali
>         Attachments: HBASE-18054.patch, HBASE-18054.v2.master.patch, 
> HBASE-18054.v3.master.patch
>
>
> Currently we log if a server is in the failed server list when we go to 
> connect to it, but we don't log anything about when the server got into the 
> list.
> This means we have to search the log for errors involving the same server 
> name that (hopefully) managed to get into the log within 
> {{FAILED_SERVER_EXPIRY_KEY}} milliseconds earlier (default 2 seconds).



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