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From "deepankar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15437) Response size calculated in RPCServer for warning tooLarge responses does NOT count CellScanner payload
Date Mon, 04 Apr 2016 07:51:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15223789#comment-15223789
] 

deepankar commented on HBASE-15437:
-----------------------------------

Sorry for the mistake, fixed it now.

bq. Its pity that we dont pass Call to this method and so we need to do get it from ThreadLoal
which will have slight perf overhead. And this method is marked non private.

Yeah I tried to some how get the Call to this method (I was looking all the callee's of this
method actually send the params by taking them from call object), but felt like it turns out
to be a bigger refactoring process and  might also break some external facing pluggable APIs
and then decided to take this route.

> Response size calculated in RPCServer for warning tooLarge responses does NOT count CellScanner
payload
> -------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-15437
>                 URL: https://issues.apache.org/jira/browse/HBASE-15437
>             Project: HBase
>          Issue Type: Bug
>          Components: IPC/RPC
>            Reporter: deepankar
>            Assignee: deepankar
>         Attachments: HBASE-15437-v1.patch, HBASE-15437.patch
>
>
> After HBASE-13158 where we respond back to RPCs with cells in the payload , the protobuf
response will just have the count the cells to read from payload, but there are set of features
where we log warn in RPCServer whenever the response is tooLarge, but this size now is not
considering the sizes of the cells in the PayloadCellScanner. Code form RPCServer
> {code}
>       long responseSize = result.getSerializedSize();
>       // log any RPC responses that are slower than the configured warn
>       // response time or larger than configured warning size
>       boolean tooSlow = (processingTime > warnResponseTime && warnResponseTime
> -1);
>       boolean tooLarge = (responseSize > warnResponseSize && warnResponseSize
> -1);
>       if (tooSlow || tooLarge) {
>         // when tagging, we let TooLarge trump TooSmall to keep output simple
>         // note that large responses will often also be slow.
>         logResponse(new Object[]{param},
>             md.getName(), md.getName() + "(" + param.getClass().getName() + ")",
>             (tooLarge ? "TooLarge" : "TooSlow"),
>             status.getClient(), startTime, processingTime, qTime,
>             responseSize);
>       }
> {code}
> Should this feature be not supported any more or should we add a method to CellScanner
or a new interface which returns the serialized size (but this might not include the compression
codecs which might be used during response ?) Any other Idea this could be fixed ?



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