Hi all,
Jing Zhao and I recently have reimplemented the JSP-based web UIs in HTML 5 applications (HDFS-5333). Based on our prelimanary testing results we believe thst the new web UIs of the namenodes and the datanode are ready for everyday uses. You're more than welcome to try it out on trunk by visiting http:// <namenode>/dfshealth.html There are a number of benefits from this transition. From a developer's prospective, the most notable one is *maintainability*: (1) The abstractions between the UI and the core server are well-defined, decoupling the UI and the core hadoop servers. (2) It allows us to deprecate the logic in the JSP pages. The old web UIs have to duplicate the logic in the JSPs. The logic is often out-of-dated and not well-tested, which leads to broken pages and security vulnerabilities(e.g. HDFS-5251, HDFS-5307, HDFS-5308, HDFS-5317 and HDFS-4901). The architecture of the new UIs prevent these bugs at the very beginning. I propose that deprecate the old, JSP-based web UIs in 2.3. I opened HDFS-5402 to track the relevant discussions. Your feedbacks are highly appreciated. Sincerely, Haohui -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
