GitHub user doanduyhai reopened a pull request:
https://github.com/apache/zeppelin/pull/1369
[ZEPPELIN-1376] Add proxy credentials for dependency repo for corporate
firewall use-cases
### What is this PR for?
When using Zeppelin behind corporate firewall, sometimes the dependencies
download just fails silently. This PR has 2 objectives:
* add proxy credentials information for dependencies repo
* raise clear error message in case of dependencies download failure
There are 3 commits.
The first one add extra inputs in the form for adding new repository
The second commit fixes some issues and display a clear and explicit error
message when download of dependencies fail.
Before that, when the download fails, we can see the below behaviour
* the error message is displayed twice because the call twice the method
`checkDownloadingDependencies();`. One in the success callback of:
```javascript
$scope.updateInterpreterSetting = function(form, settingId) {
...
$http.put(baseUrlSrv.getRestApiBase() + '/interpreter/setting/'
+ settingId, request)
.success(function(data, status, headers, config) {
$scope.interpreterSettings[index] = data.body;
removeTMPSettings(index);
thisConfirm.close();
checkDownloadingDependencies();
$route.reload();
})
.error(function(data, status, headers, config) {
...
};
```
Another call is inside success callback of `getInterpreterSettings()`
```javascript
var getInterpreterSettings = function() {
$http.get(baseUrlSrv.getRestApiBase() + '/interpreter/setting')
.success(function(data, status, headers, config) {
$scope.interpreterSettings = data.body;
checkDownloadingDependencies();
}).error(function(data, status, headers, config) {
....
```
The problem is that `$route.reload();` in the success callback of
`updateInterpreterSetting()` will trigger `init()` then
`getInterpreterSettings()` so `checkDownloadingDependencies()` is called twice.
I remove the call to `checkDownloadingDependencies()` from success callback
of `updateInterpreterSetting()`
The second modification is on class `DependencyResolver`. In the screen
capture above, we get a **cryptic** NullPointerException coming from
`DefaultRepositorySystem`. I now catch this NPE to wrap it into a more sensible
and clearer exception:
```java
public List<ArtifactResult> getArtifactsWithDep(String dependency,
Collection<String> excludes) throws RepositoryException {
Artifact artifact = new DefaultArtifact(dependency);
DependencyFilter classpathFilter =
DependencyFilterUtils.classpathFilter(JavaScopes.COMPILE);
PatternExclusionsDependencyFilter exclusionFilter =
new PatternExclusionsDependencyFilter(excludes);
CollectRequest collectRequest = new CollectRequest();
collectRequest.setRoot(new Dependency(artifact, JavaScopes.COMPILE));
synchronized (repos) {
for (RemoteRepository repo : repos) {
collectRequest.addRepository(repo);
}
}
DependencyRequest dependencyRequest = new
DependencyRequest(collectRequest,
DependencyFilterUtils.andFilter(exclusionFilter,
classpathFilter));
//Catch NPE thrown by aether and give a proper error message
try {
return system.resolveDependencies(session,
dependencyRequest).getArtifactResults();
} catch (NullPointerException ex) {
throw new RepositoryException(String.format("Cannot fetch
dependencies for %s", dependency));
}
}
```
The result is much more cleaner
The last commit is just doc update
### What type of PR is it?
[Improvement]
### Todos
* [ ] - Code Review
* [ ] - Simple test with no Internet connection
* [ ] - Test within a corporate firewall env with a third-party dependency,
requiring download
### What is the Jira issue?
**[ZEPPELIN-1376]**
### How should this be tested?
##### Simple test
* `git fetch origin pull/1369/head:WebProxy`
* `git checkout WebProxy`
* `mvn clean package -DskipTests`
* `bin/zeppelin-daemon.sh restart`
* disconnect from the Internet (pull out the cable, shutdown wifi ...)
* add a random dependency to the Spark interpreter (take
`info.archinnov:achilles-core:4.2.2` for example)
* validate the change, you should see an error popup on the top-right
corner saying that Zeppelin cannot download the dependency
##### Corporate firewall test
* follow the steps above for simple test
* create a new repository (see how to **[here]**) and set the proxy
information
* retry the steps above to ensure that the download is successful
### Screenshots (if appropriate)
See above
### Questions:
* Does the licenses files need update? --> **NO**
* Is there breaking changes for older versions? --> **NO**
* Does this needs documentation? --> **YES, DONE**
[ZEPPELIN-1376]: https://issues.apache.org/jira/browse/ZEPPELIN-1376
[here]: http://localhost:4000/manual/dependencymanagement.html
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/doanduyhai/incubator-zeppelin ZEPPELIN-1376
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/1369.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 #1369
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