[jira] [Created] (IMPALA-6332) Impala webserver should return HTTP error code for missing query profiles

["Zoram Thanga (JIRA)" <ji...@apache.org>]

Zoram Thanga created IMPALA-6332:
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             Summary: Impala webserver should return HTTP error code for missing query profiles
                 Key: IMPALA-6332
                 URL: https://issues.apache.org/jira/browse/IMPALA-6332
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 2.10.0, Impala 2.11.0
            Reporter: Zoram Thanga
            Priority: Minor
             Fix For: Impala 2.11.0


When we try to read the thrift runtime profile of a query soon after the query is finished, sometimes the profile cannot be found in either the query map or query log. Then the server sends back "Query id $0 not found." from ImpalaServer::GetRuntimeProfileStr(). This is followed up in ImpalaHttpHandler::QueryProfileEncodedHandler() as:

ss.str(Substitute("Could not obtain runtime profile: $0", status.GetDetail()));

The string us returned to the caller, but the HTTP response code is OK. This can fool clients into thinking that they successfully read a valid thrift profile. But since that's not true, clients that deserialize the thrift profile may think that they received a corrupted profile.

We should change the code to send back a non-OK response, such as 404 in this situation.



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