all right, thanks~ 在 2012年7月5日星期四，Marcos Ortiz 写道：
> Jason, > Ramon is right. > The best way to debug a MapReduce job is mounting a local cluster, and > then, when you have tested enough your code, then, you can > deploy it in a real distributed cluster. > On 07/04/2012 10:00 PM, Jason Yang wrote: > > ramon, > > Thank for your reply very much. > > However, I was still wonder whether I could debug a MR application in > this way. > > I have read some posts talking about using NAT to redirect all the > packets to the network card which connect to the local LAN, but it does not > work as I tried to redirect by using iptables :( > > 在 2012年7月4日星期三， 写道： > >> Jason, >> >> >> the easiest way to debug a MapRedupe program with eclipse is working on >> hadoop local. >> http://hadoop.apache.org/common/docs/r0.20.2/quickstart.html#Local In >> this mode all the components run locally on the same VM and can be easily >> debugged using Eclipse. Hope this will be useful. >> >> >> >> *From:* Jason Yang [mailto:lin.yang.ja...@gmail.com] >> *Sent:* miércoles, 04 de julio de 2012 11:25 >> *To:* mapreduce-user >> *Subject:* How to connect to a cluster by using eclipse >> >> >> >> Hi, all >> >> >> >> I have a hadoop cluster with 3 nodes, the network topology is like this: >> >> 1. For each DataNode, its IP address is like :192.168.0.XXX; >> >> 2. For the NameNode, it has two network cards: one is connect with the >> DataNodes as a local LAN with IP address 192.168.0.110, while the other one >> is connect to the company network(which eventually connect to the Internet); >> >> -- >> >> now I'm trying to debug a MapReduce program on a computer which is in the >> company network. Since the jobtracker in this scenario is >> 192.168.0.110:9001, I was wondering how could I connect to the cluster >> by using eclipse? >> >> >> >> -- >> >> YANG, Lin >> >> >> >> ------------------------------ >> Subject to local law, communications with Accenture and its affiliates >> including telephone calls and emails (including content), may be monitored >> by our systems for the purposes of security and the assessment of internal >> compliance with Accenture policy. >> >> ______________________________________________________________________________________ >> >> www.accenture.com >> > > > -- > YANG, Lin > > > -- > ** > > Marcos Luis Ortíz Valmaseda > *Data Engineer && Sr. System Administrator at UCI* > about.me/marcosortiz > My Blog <http://marcosluis2186.posterous.com> > @marcosluis2186 <http://twitter.com/marcosluis2186> > ** > > > > <http://www.uci.cu/> > > -- YANG, Lin
