frequently asked questions in java

NHibernate frequently asked questions and how to solve themHave learned nhibernate, but since the work to now almost a year has never been used, recently to consolidate but found to forget a lot, a "in expected: the issue may be caused by the version number in the Hbm.xmlnhibernate file. The 2.2 here represents the NHibernate version number and must match th

When using ATL to develop COM components, there are several problems that may occur frequently. If you do not know, it is difficult to find a solution. I have seen that some people have also asked the same questions on csdn, but few have provided satisfactory answers. Therefore, I will write These FAQs below to avoid repeated efforts by others. I. Q: When calling

Label:mysql-5.6.17 compiling installation and frequently asked Questions The previous version of MySQL was 5.1, and it was easy to install by using a free-build package. Recently replaced by 5.6 version of MySQL, the installation process has a lot of problems. 1. Uninstall the original version of MySQL Check for MySQL that is already installed: # RPM-QA |grep MyS

SQL Server 2000 replication synchronization configuration and frequently asked questions (below)(ii) Distribution, release of server-side configuration and issues1. Start the configuration publication, subscribe to the service area, and the Distribution Wizard2. Specify the snapshot shared folder on the network location3. Complete configuration4. Start the New Pu

can only configure TOMCAT6, Can not configure TOMCAT7 and other high version, in fact, this is also a solution, and later.If we use the MAVEN plugin to develop, some people will use the jetty plug-in or the Tomcat plugin to deploy the application, if the deployment of the application has some problems, such as: we sometimes need to find in the Web container is not successful deployment, and so on, if the use of plug-ins at this time, it may be a bit inconvenient, It would be useful to have a my

you add a key to SSH. What if there is no data in Namenode?Namenode without data cannot be called Namenode, and usually namenode will have data. What happens to Namenode when job tracker is down?When the job tracker fails, the cluster still works, as long as the namenode is not a problem.Is it a client or a Namenode decision to enter a shard? This is not determined by the client, in the configuration file, and in determining the Shard details.Can I build a Hadoop cluster on my own? Yes, as

the system is too low to cause the FASTDFS compilation to fail. Please check if the libevent version is 1.4.x or above.Q: When you start the FASTDHT service, the "segment error" is prompted, what is the reason?A: This is because FDHTD requires a dependent libdb-5.3.so that is not properly installed or is pointing to the link. You can use the command ldd/usr/local/bin/fdhtd to view the dependencies of the FDHTD command, and if the libdb dependency that is displayed is not version 5.3, first conf

?You can use the Simpleprepropertyfilter filter field to see more here: https://github.com/alibaba/fastjson/wiki/%E4%BD%BF%E7%94% A8simplepropertyprefilter%e8%bf%87%e6%bb%a4%e5%b1%9e%e6%80%a7For more information on customizing serialization, see here: https://github.com/alibaba/fastjson/wiki/%E5%AE%9A%E5%88%B6%E5%BA%8F%E5%88%97%E5%8C%9610. What if the serialized result browser is not supported when there is a reference to the object?Use the Serializerfeature.disablecircularreferencedetect attrib

blocked in the Loop Queue.next () in the Nativepollonce () method, at this time the main thread will release the CPU resources into hibernation until the next message arrives or a transaction occurs, The main thread is awakened by writing data to the pipe's writing end. The epoll mechanism used here is an IO multiplexing mechanism that can monitor multiple descriptors at the same time, when a descriptor is ready (read or write ready), immediately notifies the corresponding program to read or wr

Frequently Asked Questions about compiling html pages (1): compiling html pages When it comes to writing pages, many people may encounter many details and compatibility issues when they are just getting started with writing pages. Here I will summarize some small problems that I often encounter. Hope to help beginners who build learning pages! Although many compa

This article mainly introduces the 11 most frequently asked questions and answers in PHP. each company has its own interview standards. interviews and questions depend entirely on your role in your work, of course, it is also closely related to your programming skills. if you need a friend, can you refer to whether you