GitHub user zjffdu reopened a pull request:
https://github.com/apache/zeppelin/pull/2455
ZEPPELIN-1515. Notebook: HDFS as a backend storage (Use hadoop client jar)
### What is this PR for?
This PR is trying to add hdfs as another implementation for `NotebookRepo`.
There's another PR about using webhdfs to implement that. Actually hdfs client
library is compatibility cross major versions. See
http://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/Compatibility.html#Wire_compatibility,
if using webhdfs, the code become more complicated and may lose some features
of hdfs.
This PR is also required for HA of zeppelin, so that multiple zeppelin
instances can share notes via hdfs. Besides I add hadoop-client in pom file.
So zeppelin will package hadoop client jar into its binary distribution. This
is because zeppelin may be installed in a gateway machine where no hadoop is
installed (only hadoop configuration file is existed in this machine) And since
the hadoop client will work with multiple versions of hadoop, so it is fine to
package into binary distribution. Spark also package hadoop client jar in its
binary distribution.
### What type of PR is it?
[Feature]
### Todos
* [ ] - Task
### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN-1515
### How should this be tested?
Unit test is added. Also manually verify it in a single node cluster.
### Screenshots (if appropriate)
### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zjffdu/zeppelin ZEPPELIN-1515
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/2455.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2455
----
commit 71b978d3d24afe32470b0516eeb6f2caff947cc1
Author: Jeff Zhang <zjf...@apache.org>
Date: 2017-06-30T06:48:22Z
ZEPPELIN-1515. Notebook: HDFS as a backend storage (Read & Write Mode)
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