我有一个Rails 3.1的应用程序,关于Ruby 1.9.2,2.0.2蒙戈运行,使用Mongoid作为ODM,但是,这应该是最绕过的Mongoid,只是使用MongoDB的Ruby驱动程序。我在一个页面加载中几次运行MapReduce查询。这将查询将在发展的同时可接受运行,说喜欢半天,然后失败,并MongoDB的MapReduce的查询随机失败
(assertion: 'value has to be set';
assertionCode: '10210';
errmsg: 'db assertion failure';
ok: '0.0')
在页面的刷新,一切都将继续奇妙工作一段时间。从执行日志(有一些修剪出)...
(R) MONGODB development['$cmd'].find({"mapreduce"=>"values", "map"=><BSON::Code:70098680478720 @data="function() {
var value = { a: 0, b: 0 };
var count = { a: 0, b: 0 };
var min = { a: 100, b: 100 };
var max = { a: -100, b: -100 };
if (this.c == "a" || this.c == "b") {
value[this.c] = parseInt(this.value);
count[this.c]++;
min[this.c] = parseInt(this.value);
max[this.c] = parseInt(this.value);
emit(this.item_id,
{
count: count,
values: value,
min: min,
max: max,
avg: { a: null, b: null }
}
);
}
}" @scope="{}">, "reduce"=><BSON::Code:70098680478680 @data="function(key, data) {
var newDatum = data.pop();
data.forEach(function(item) {
newDatum.values.a += item.values.a;
newDatum.count.a += item.count.a;
if (item.min.a < newDatum.min.a)
newDatum.min.a = item.min.a;
if (item.max.a > newDatum.max.a)
newDatum.max.a = item.max.a;
// same for b
});
newDatum.avg.a = newDatum.values.actual/newDatum.count.a;
newDatum.avg.b = newDatum.values.ideal/newDatum.count.b;
return newDatum;
}" @scope="{}">, :out=>{:inline=>1}, :query=>{:about_id=>BSON::ObjectId('4f1d84de69c238941d000012'), :by_id=>{"$ne"=>BSON::ObjectId('4f1d84de69c238941d000012')}, :comp_id=>{"$in"=>[BSON::ObjectId('4f1d84de69c238941d000016'), BSON::ObjectId('4f1d84de69c238941d000019')]}}}).limit(-1)
现在对于一个在同一请求失败...查询部分(但同样,将显著往往不是成功)
}" @scope="{}">, :out=>{:inline=>1}, :query=>{:about_id=>BSON::ObjectId('4f1d84de69c238941d000012'), :by_id=>BSON::ObjectId('4f1d84de69c238941d000012'), :comp_id=>BSON::ObjectId('4f1d84de69c238941d000019')}}).limit(-1)
Completed 500 Internal Server Error in 516ms
Mongo::OperationFailure (Database command 'mapreduce' failed: (assertion: 'value has to be set'; assertionCode: '10210'; errmsg: 'db assertion failure'; ok: '0.0').):
如果它的任何价值的,这是在Mac OS X Lion的发生与蒙戈通过自制软件安装。
$ mongod --version
db version v2.0.2, pdfile version 4.5
Wed Feb 8 16:33:11 git version: 514b122d308928517f5841888ceaa4246a7f18e3
而我在日志文件中可以看到这个事件。关于mr失败的一条线似乎与事件相符。
Wed Feb 8 15:08:36 [clientcursormon] mem (MB) res:15 virt:2630 mapped:80
Wed Feb 8 15:11:37 [clientcursormon] mem (MB) res:17 virt:2630 mapped:80
Wed Feb 8 15:16:37 [clientcursormon] mem (MB) res:17 virt:2630 mapped:80
Wed Feb 8 15:21:37 [clientcursormon] mem (MB) res:17 virt:2630 mapped:80
Wed Feb 8 15:26:37 [clientcursormon] mem (MB) res:17 virt:2630 mapped:80
Wed Feb 8 15:31:37 [clientcursormon] mem (MB) res:17 virt:2630 mapped:80
Wed Feb 8 15:32:55 [conn3] mr failed, removing collection :: caused
by :: 10210 value has to be set
Wed Feb 8 15:36:37 [clientcursormon] mem (MB) res:18 virt:2630 mapped:80
Wed Feb 8 15:39:26 [initandlisten] connection accepted from 127.0.0.1:57001 #4
所以我的问题是,我能做些什么来帮助追踪这件事?我没有注意到我们使用Mongo的其他问题。我不确定如何深入了解并了解发生了什么。