0006083: CurlMultiResource#execute Stuck in Infinite Loop

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Category

Severity

Reproducibility

Date Submitted

Last Update

0006083

[Quercus]

crash

always

08-04-17 11:43

Reporter

michaelahlers

View Status

public

Assigned To

Priority

normal

Resolution

open

Platform

Status

new

Projection

none

OS Version

ETA

none

Fixed in Version

Product Version

Product Build

Summary

0006083: CurlMultiResource#execute Stuck in Infinite Loop

Description

When using curl_multi_exec, com.caucho.quercus.lib.curl.CurlMultiResource#execute is called in an infinite loop, apparently because _runningCount is never decremented as requests complete.

This is easily reproducible with the following PHP script (using Guzzle) invoked using either QuercusEngine (or any other means):

<?php
$client = new \\Guzzle\\Http\\Client('https://caucho.com'); [^]
$client->get('/')->send();
$client->get('/')->send();
?>

One request will succeed, but the script will always hang on subsequent requests.

I found that adding this statement to com.caucho.quercus.lib.curl.CurlMultiResource#removeCurl (after _curlList.remove(curl)):

if (isRemoved) {
_runningCount--;
}

Reliably fixes the bug (however, I'm not sure what implications this might have besides).

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Issue History
Date Modified	Username	Field	Change
08-04-17 11:43	michaelahlers	New Issue

Mantis 1.0.0rc3[^]

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24 unique queries executed.