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Bug #66795 corrupted result getting multi-key from MySQL 5.6 memcached plugin
Submitted: 2014-02-28 13:45 UTC Modified: 2021-03-25 16:37 UTC
From: ivan dot antonyuck at gmail dot com Assigned: cmb (profile)
Status: Closed Package: memcache (PECL)
PHP Version: 5.5.9 OS: debian 7 (3.2.0-4-amd64 #1)
Private report: No CVE-ID: None
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From: ivan dot antonyuck at gmail dot com
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 [2014-02-28 13:45 UTC] ivan dot antonyuck at gmail dot com 
Description:
------------
php version:
 php5                                 5.5.9-1~dotdeb.1

OS version:
3.2.0-4-amd64 #1 SMP Debian 3.2.54-2 x86_64 GNU/Linux

plugin version
memcache 2.2.7   stable

description
we getting two keys from mysql 5.6 memcache plugin with memcache like this:

$data = $memcache->get( [ $k1 = "@@space1.$id", $k2 = "@@space2.$id" ] );

and we get slightly corrupted answer:

(fields divided by pipe character (|) )

[@@space1.fafb0273-3c41-4b71-b5b7-345cde2d105b] => 00000000-0000-0000-0000-000000000002|[]e|9|"ID":"fafb0273-3c41-4b71-...

note the '[]' in second field. according to DB, it should contain text 'note'.
space2 key is uncorrupdted.

we decided to test it by using telnet, and we got

get @@space1.fafb0273-3c41-4b71-b5b7-345cde2d105b
VALUE @@space1.fafb0273-3c41-4b71-b5b7-345cde2d105b 0 1827
00000000-0000-0000-0000-000000000002|note|9|"ID":"fafb0273-3c41-4b71-...

- this result has right value in second field.

when we changed our code to run two single get's memcache returns right value, as returned by memcache plugin by telnet.

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 [2021-03-25 16:37 UTC] cmb@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: cmb
 [2021-03-25 16:37 UTC] cmb@php.net 
The official bug tracker for PECL/memcache is now at
<https://github.com/websupport-sk/pecl-memcache/issues>.

So, if this is still an issue with either of the current memcache
versions (4 or 8), please file an issue there.
 
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