Package: ruby-mysql2 Severity: important
Hi,
Currently, the MySQL library is not properly initialized when the gem is
loaded, which can prevent connections from other threads, because of a
race condition.
This is fixed by an upstream commit which initialized correctly the
MySQL library:
de48627ee89b9dfd7d966f3ea747e95a48085792
Added call to mysql_library_init during initialization of the gem
Reproduced below:
-------------------------8<-----------------------
Author: Michael Kruglos <mich...@kruglos.com>
AuthorDate: Wed Jul 30 22:52:50 2014 +0300
Commit: Michael Kruglos <mich...@kruglos.com>
CommitDate: Thu Jul 31 11:26:31 2014 +0300
Added call to mysql_library_init during initialization of the gem
This call must be performed before trying to call mysql_init from
multiple threads
Reference: http://dev.mysql.com/doc/refman/5.1/en/mysql-init.html
Minimal reproduction of the problem if mysql_library_init is not called
require 'mysql2'
def connect
Mysql2::Client.new()
end
threads = [0,1].map {
Thread.new { connect }
}
threads.map(&:join)
puts "OK!"
---
ext/mysql2/client.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/ext/mysql2/client.c b/ext/mysql2/client.c
index c22b5b8..71a7a35 100644
--- a/ext/mysql2/client.c
+++ b/ext/mysql2/client.c
@@ -1235,6 +1235,13 @@ void init_mysql2_client() {
}
}
+ /* Initializing mysql library, so different threads could call Client.new */
+ /* without race condition in the library */
+ if (mysql_library_init(0, NULL, NULL) != 0) {
+ rb_raise(rb_eRuntimeError, "Could not initialize MySQL client library");
+ return;
+ }
+
#if 0
mMysql2 = rb_define_module("Mysql2"); Teach RDoc about Mysql2 constant.
#endif
----------8<------------------------------
-- System Information:
Debian Release: jessie/sid
APT prefers unstable
APT policy: (990, 'unstable'), (500, 'testing'), (100, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
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