Question

我的MongoS服务器并不盯着他们在日志中发送此错误。

SHARDING [Balancer]在进行平衡时捕获异常：服务器分片元数据管理器无法初始化并将保留这个状态直到实例被手动重置::由::引起 HostNotFound：无法解析主机confserv_1.xyz.com的DNS

2016-05-02T17:57:06.612+0530 I SHARDING [Balancer] about to log metadata event into actionlog: { _id: "DB2255-2016-05-02T17:57:06.611+0530-5727479aa1051c5fb04fcc49", server: "mongoS1", clientAddr: "", time: new Date(1462192026611), what: "balancer.round", ns: "", details: { executionTimeMillis: 35, errorOccured: true, errmsg: "Server's sharding metadata manager failed to initialize and will remain in this state until the instance is manually reset :: caused by :: HostNotFoun..." } }

当我使用主机名连接配置服务器时，它工作正常我试图重启MongoS服务器它没有出现。

我检查了Mongo代码，发现了这个错误 https://github.com/mongodb/mongo/blob/master/src/mongo/db/s/sharding_state.cpp

/ TODO: remove after v3.4.
// This is for backwards compatibility with old style initialization through metadata
// commands/setShardVersion. As well as all assignments to _initializationStatus and
// _setInitializationState_inlock in this method.
if (_getInitializationState() == InitializationState::kInitializing) {
    auto waitStatus = _waitForInitialization_inlock(deadline, lk);
    if (!waitStatus.isOK()) {
        return waitStatus;
    }
}

if (_getInitializationState() == InitializationState::kError) {
    return {ErrorCodes::ManualInterventionRequired,
            str::stream() << "Server's sharding metadata manager failed to initialize and will "
                             "remain in this state until the instance is manually reset"
                          << causedBy(_initializationStatus)};
}

但它没有提到需要什么手动干预。目前的Mongo版本是3.2.6

Answer 1

我在尝试加强安全配置时遇到了这个问题。在您的情况下，我能够从所有mongos实例连接到配置服务器。

在我的情况下，我也在测试一个案例，副本集的成员位于不同的数据中心，我只是在steppingDown一些初选之后才遇到问题。

我最后注意到，不是因为错误消息假装，问题发生在一个数据中心的一些初选中，他们无法路由回配置服务器。修复路由问题（最终/ etc / hosts）后，mongo端不再出现问题。

MongoS分片元数据管理器无法请求实例手动重置

1 个答案: