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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7317) server-side request problems are hard to debug
Date Wed, 12 Dec 2012 00:57:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13529523#comment-13529523

Sergey Shelukhin commented on HBASE-7317:

That sounds like a good idea... I am assuming it would need to be first ported to Apache,
or can we just use Maven dependency and start instrumenting?
> server-side request problems are hard to debug
> ----------------------------------------------
>                 Key: HBASE-7317
>                 URL: https://issues.apache.org/jira/browse/HBASE-7317
>             Project: HBase
>          Issue Type: Brainstorming
>          Components: IPC/RPC, regionserver
>            Reporter: Sergey Shelukhin
>            Priority: Minor
> I've seen cases during integration tests where the write or read request took an unexpectedly
large amount of time (that, after the client went to the region server that is reported alive
and well, which I know from temporary debug logging :)), and it's impossible to understand
what is going on on the server side, short of catching the moment with jstack.
> Some solutions (off by default) could be 
> - a facility for tests (especially integration tests) that would trace Server/Master
calls into some log or file (won't help with internals but at least one could see what was
actually received);
> - logging the progress of requests between components inside master/server (e.g. "request
id=N received", "request id=N is being processed in MyClass", N being drawn on client from
local sequence - no guarantees of uniqueness are necessary).

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