Memcache extension can't read from memcached

[nicolacontu]

Hello
I've installed php 7.1.1 and the extensions is version 3.0.9-dev

When I try to do a session_start I get :
Warning: session_start(): Failed to read session data: memcache (path: tcp://127.0.0.1:11211) in /usr/local/httpd-2.4.25/logs/test.php on line 1
array(0) {
}

This the script I used :

This is my php.ini
session.save_handler = memcache
session.save_path = '127.0.0.1:11211'
memcache.lock_timeout = 60
extension=memcache.so

Can you please check?
Thanks

[tomassrnka]

Hi, can you use memcache outside of the extension? We use the extension with PHP 7.1 without any problems.

[nicolacontu]

Hi, yes I'm using it with php5.6.6 with the pecl-memcache extension 3.0.8

…

________________________________ Da: Tomas Srnka <notifications@github.com> Inviato: mercoledì 19 aprile 2017 16.28 A: websupport-sk/pecl-memcache Cc: nicolacontu; Author Oggetto: Re: [websupport-sk/pecl-memcache] Memcache extension can't read from memcached (#23) Hi, can you use memcache outside of the extension? We use the extension with PHP 7.1 without any problems. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#23 (comment)>, or mute the thread</~https://github.com/notifications/unsubscribe-auth/AMWZkTVo5Cdr4pN0geSScRbOH1BrHJkDks5rxhoNgaJpZM4NAaw0>.

[klandaika]

Having same issue here when using native session handler via php.ini directives and calling session_start() on PHP 7.1.4 :

session.save_handler = memcache
session.save_path = 'tcp://host:11211'

However when using new Memcache() with addServer all object functions work as expected and I am able to read/write data to the server.

On PHP 7.0.17 and same configs session_start() works correctly with native session handler

I compile for windows, tried x86 and also as x64 with same results.

[krzaczek]

Same here

session_start(): Failed to read session data: memcache (path: tcp://127.0.0.1:11211)

PHP 7.1.7-1+ubuntu16.04.1+deb.sury.org+1 (cli) (built: Jul  7 2017 09:41:45) ( NTS )
Version => 3.0.9-dev

new Memcache() is working fine. Only session support is broken.

@tomassrnka

[ramsey]

I'm experiencing the same issue with PHP 7.1.7 and the latest commit of the memcache extension: e702b5f

Error message is the same:

session_start(): Failed to read session data: memcache (path: tcp://127.0.0.1:11211)

Has anyone found a work-around yet? I'm able to use the same version of the extension on PHP 7.0.x without any problems.

[nicolacontu]

I just switched to memcahed extension

…

________________________________ Da: Ben Ramsey <notifications@github.com> Inviato: giovedì 17 agosto 2017 01:14 A: websupport-sk/pecl-memcache Cc: nicolacontu; Author Oggetto: Re: [websupport-sk/pecl-memcache] Memcache extension can't read from memcached (#23) I'm experiencing the same issue with PHP 7.1.7 and the latest commit of the memcache extension: e702b5f<e702b5f> Error message is the same: session_start(): Failed to read session data: memcache (path: tcp://127.0.0.1:11211) Has anyone found a work-around yet? I'm able to use the same extension on PHP 7.0.x without any problems. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#23 (comment)>, or mute the thread</~https://github.com/notifications/unsubscribe-auth/AMWZkYSIn4jkXU0Ti55yMgMI4QW6d76Vks5sY3fvgaJpZM4NAaw0>.

[ramsey]

I was able to create a simple reproducible version of this, using Docker. The repository is here: /~https://github.com/ramsey/pecl-memcache-issue-23

To run it to see the session_start() warning:

git clone /~https://github.com/ramsey/pecl-memcache-issue-23
cd pecl-memcache-issue-23/
docker-compose up

Now, the two containers should be running, and you can open the following in your browser to verify:

• http://localhost:8001/info.php (should be running PHP 7.0)
• http://localhost:8002/info.php (should be running PHP 7.1)

To test the session_start() issue and see the warning, open the following:

• PHP 7.0: http://localhost:8001/ (the session should work as expected)
• PHP 7.1: http://localhost:8002/ (session_start() should generate a warning)

See the repository for more information.

I hope this helps! 😄

[ramsey]

@tomassrnka, have you been able to take a look at my reproduction steps yet?

[Roze]

Since the php 7+ session module now expects a string for a valid response the error appears when the memcache extension returns that the key doesn't exist for a fresh/uninitialised session.

For me kind of works (haven't fully tested though (for example with binary protocol)) this small change:

--- pecl-memcache-NON_BLOCKING_IO_php7/php7/memcache_session.c  2017-08-02 12:38:18.000000000 +0300
+++ pecl-memcache-NON_BLOCKING_IO_php7/php7/memcache_session.c   2017-09-06 15:40:59.101003326 +0300
@@ -289,7 +289,7 @@
                        ZVAL_NULL(&addresult);

                        /* third request fetches the data, data is only valid if either of the lock requests succeeded */
-                       ZVAL_NULL(&dataresult);
+                       ZVAL_EMPTY_STRING(&dataresult);

                        /* create requests */
                        if (php_mmc_session_read_request(pool, &zkey, lockparam, &addresult, dataparam, &lockrequest, &addrequest, &datarequest) != MMC_OK) {

[krzaczek]

@Roze yep that fixes the problem ... thx

[remicollet]

@Roze could be better to open a pull request.

[nono303]

@remicollet Thanks for the patch!
Work fine on Windows.
dll build for 7.2.x VC15, x86 & X64 / TS & NTS available @ /~https://github.com/nono303/PHP7-memcache-dll

[JonathanFinch-awin]

I was getting the following error on PHP 7.2 with debian php-memcache 3.0.9:

Error #2 session_start(): Failed to read session data: memcache

I manually installed the latest php memcache version 4.0.4 in my dockerfile and this resolved the issue.

RUN apt-get install libz-dev \
&& cd /tmp \
&& wget -O "memcache-4.0.4.tar.gz" "/~https://github.com/websupport-sk/pecl-memcache/archive/4.0.4.tar.gz" \
&& tar -xvzf "memcache-4.0.4.tar.gz" \
&& cd "pecl-memcache-4.0.4" \
&& phpize \
&& ./configure \
&& make \
&& make install