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Posted to issues@calcite.apache.org by "Stamatis Zampetakis (JIRA)" <ji...@apache.org> on 2019/06/18 22:36:00 UTC
[jira] [Updated] (CALCITE-3134) Infinite loop in AvaticaHttpClient
when response status code is 503
[ https://issues.apache.org/jira/browse/CALCITE-3134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Stamatis Zampetakis updated CALCITE-3134:
-----------------------------------------
Summary: Infinite loop in AvaticaHttpClient when response status code is 503 (was: Avatica Remote JDBC HttpClient may run Infinite loop)
> Infinite loop in AvaticaHttpClient when response status code is 503
> -------------------------------------------------------------------
>
> Key: CALCITE-3134
> URL: https://issues.apache.org/jira/browse/CALCITE-3134
> Project: Calcite
> Issue Type: Improvement
> Components: avatica
> Reporter: Leo Tu
> Priority: Major
>
> The implementation of AvaticaHttpClient
> * org.apache.calcite.avatica.remote.AvaticaHttpClientImpl
> or
> * org.apache.calcite.avatica.remote.AvaticaCommonsHttpClientImpl
>
> "while (true) ... 503 continue"
> i have face that client run forever when HTTP code 503.
> (i.e, Nginx proxy gateway failed return 503 code always)
>
>
> -------------- -red color- --------
> {color:#ff0000}*public* *byte*[] send(*byte*[] request){color} {
> {color:#ff0000}*while* (*true*) {{color}
> ...
> *try* (CloseableHttpResponse response = execute(post, context)) {
> *final* *int* statusCode = response.getStatusLine().getStatusCode();
> *if* (HttpURLConnection.*_HTTP_OK_* == statusCode
> ...
> {color:#ff0000} {color}*else* *if* ({color:#d04437}HttpURLConnection.*_HTTP_UNAVAILABLE_* == statusCode{color})
> *_LOG_*.debug("Failed to connect to server (HTTP/503), retrying");
> {color:#ff0000}*continue*;{color}
> }
> } *catch* (NoHttpResponseException e)
> { // This can happen when sitting behind a load balancer and a backend server dies *_LOG_*.debug("The server failed to issue an HTTP response, retrying"); *continue*; }
> *catch* (RuntimeException e)
> { *throw* e; }
> *catch* (Exception e)
> { *_LOG_*.debug("Failed to execute HTTP request", e); *throw* *new* RuntimeException(e); }
> ...
>
>
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