Segfault when setting SearchOptions->fields dynamically

PHP SDK
1

Hello,
I’ve encounter ‘segmentation fault’ recently when using php sdk.
I’ve isolated the problem and have some script to reproduce it:

<?php
$config = [
    'host' => couchbase_host,
    'username' => couchbase_username,
    'password' => couchbase_password,
    'bucket' => couchbase_bucket,
];

// Connection
$connectionString = $config['host'];
$options = new \Couchbase\ClusterOptions();
$options->credentials($config['username'], $config['password']);
$cluster = new \Couchbase\Cluster($connectionString, $options);
$bucket = $cluster->bucket($config['bucket']);

// Build search query
$search_query = new \Couchbase\MatchSearchQuery($text);
$search_query->field($field);

// Define options
$options = new \Couchbase\SearchOptions();
$options->fields(['email']);                  // This works
// $options->fields([$field]);                // This produces segmentation fault when $cluster->searchQuery is called

// Perform search
$cluster->searchQuery('user_email', $search_query, $options);

Could you check this?
Or give me some advises on something wrong in this code snippet.
Thank you

EDIT:
And sometimes when using:
$options->fields(['email']);
I get:
[cb,WARN] (pcbc/search_options L:151) Non-string value detected in fields array

2

Hi @domvas, could you try latest snapshot?

http://sdk.jenkins.couchbase.com/job/php/job/sdk/job/php-win-scripted-build-pipeline/lastSuccessfulBuild/artifact/couchbase-3.0.5.tgz

3

What version of PHP interpreter and couchbase SDK are you using by the way?

4

Hi,
i’m already on the 3.0.5.
EDIT: But I will try this build.

Regarding php version:

# php -v
PHP 7.3.19-1~deb10u1 (cli) (built: Jul  5 2020 06:46:45) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.19, Copyright (c) 1998-2018 Zend Technologies
    with Zend OPcache v7.3.19-1~deb10u1, Copyright (c) 1999-2018, by Zend Technologies
    with ddtrace v0.48.3, Copyright Datadog, by Datadog
5

Using the latest snapshot solves the problem… partially.
I mean that the given example can be successfully executed now.

But there’s still something wrong somewhere.
Consider this function:

<?php
function getByEmail(string $email) {
    $options = [
        'index' => 'user_email',
    ];

    $options = array_merge(['full_result' => false], $options);

    $match_query = new \Couchbase\MatchSearchQuery($email);
    $match_query->field('email');

    // Manage couchbase search options
    $search_options = new \Couchbase\SearchOptions();

    // Connection 
    $config = config('database.couchbase.default');
    $connectionString = $config['host'];
    $c_options = new \Couchbase\ClusterOptions();
    $c_options->credentials($config['username'], $config['password']);
    $cluster = new \Couchbase\Cluster($connectionString, $c_options);
    
    //Search
    $cluster->searchQuery($options['index'], $match_query, $search_options);
}

In my tests, if I call it once, everything’s fine.
If I call it twice, I’ve got a segmentation fault.
And interestingly, if I remove this line (which is useless I know):

$options = array_merge(['full_result' => false], $options);

I end up with:

mmap() failed: [12] Cannot allocate memory

mmap() failed: [12] Cannot allocate memory
PHP Fatal error:  Out of memory (allocated 27262976) (tried to allocate 7017285945777942528 bytes) in /var/www/app/tests/Couchbase/SegFaultTest.php on line 257
[2020-12-09 13:12:36] testing.ERROR: Out of memory (allocated 27262976) (tried to allocate 7017285945777942528 bytes) {"exception":"[object] (Symfony\\Component\\ErrorHandler\\Error\\FatalError(code: 0): Out of memory (allocated 27262976) (tried to allocate 7017285945777942528 bytes) at /var/www/app/tests/Couchbase/SegFaultTest.php:257)
[stacktrace]
#0 {main}
"}
6

Hello, any news on this?

7

Hi,
is there any updates on this topic?
It’s a major blocking issue that prevents FTS usage in a programmatic way.
You can find a clear example here: https://github.com/dominique-vassard/couchbase-segfault

8

@domvas, it should be fixed now. I’ve just released version 3.1.0, and checked your reproduction script. It does not crash anymore.

9

Hello,
I’ve just made some tests and yes it’s working fine.
Thank you!