Bug 480001: MySQL 5.1.31 throws an error when you try to SET SESSION max_allowed_packet (and previous versions of MySQL were just ignoring the SET SESSION), so just warn people if their max_allowed_packet is too small

Patch By Max Kanat-Alexander <mkanat@bugzilla.org> r=LpSolit, a=LpSolit

1 files changed, 19 insertions, 0 deletions

diff --git a/Bugzilla/Config/Common.pm b/Bugzilla/Config/Common.pm
index b6aa1a108..b285b3bc9 100644
--- a/Bugzilla/Config/Common.pm
+++ b/Bugzilla/Config/Common.pm
@@ -50,6 +50,7 @@ use base qw(Exporter);
        check_netmask check_user_verify_class check_image_converter
        check_mail_delivery_method check_notification check_utf8
        check_bug_status check_smtp_auth check_theschwartz_available
+       check_maxattachmentsize
 );
 
 # Checking functions for the various values
@@ -313,6 +314,24 @@ sub check_mail_delivery_method {
     return "";
 }
 
+sub check_maxattachmentsize {
+    my $check = check_numeric(@_);
+    return $check if $check;
+    my $size = shift;
+    my $dbh = Bugzilla->dbh;
+    if ($dbh->isa('Bugzilla::DB::Mysql')) {
+        my (undef, $max_packet) = $dbh->selectrow_array(
+            q{SHOW VARIABLES LIKE 'max\_allowed\_packet'});
+        my $byte_size = $size * 1024;
+        if ($max_packet < $byte_size) {
+            return "You asked for a maxattachmentsize of $byte_size bytes,"
+                   . " but the max_allowed_packet setting in MySQL currently"
+                   . " only allows packets up to $max_packet bytes";
+        }
+    }
+    return "";
+}
+
 sub check_notification {
     my $option = shift;
     my @current_version =