Hadoop webhdfs curl 创建文件

Question

我使用 ubuntu 12，Hadoop 1.0.3，我使用 webhdfs curl 创建文件。

curl -i -X PUT "http://localhost:50070/webhdfs/v1/test.txt?op=CREATE

或使用

curl -i -X PUT -T /home/hadoop/TestFile/test.txt "http://localhost:50070/webhdfs/v1/test?op=CREATE"

两次表扬结果为

HTTP/1.1 307 TEMPORARY_REDIRECT

hdfs-site.xml 缺少什么设置？或者没有设置其他权限？

谢谢!

Answer 1

根据 Web HDFS 的文档，这是预期的:

• http://hadoop.apache.org/common/docs/stable/webhdfs.html#CREATE

当您进行第一次放置时，您将获得一个数据节点的临时重定向 URL，然后您可以向该地址发出另一个 PUT 命令以将文件实际上传到 HDFS。

文档还解释了这种两步创建方法背后的原因:

Note that the reason of having two-step create/append is for preventing clients to send out data before the redirect. This issue is addressed by the "Expect: 100-continue" header in HTTP/1.1; see RFC 2616, Section 8.2.3. Unfortunately, there are software library bugs (e.g. Jetty 6 HTTP server and Java 6 HTTP client), which do not correctly implement "Expect: 100-continue". The two-step create/append is a temporary workaround for the software library bugs.