jenkinsci / jenkinsci/java-client-api

getBuildByNumber() returns null when build exists

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#489 4 comments 0 reactions 0 assignees View on GitHub
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Java
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Description

Jenkins version: Jenkins 2.277.1
Dependency Version: 0.3.8

I tried to get an old job number using `getBuildByNumber()`:
```
Build build = jenkins.getJob(deployServicesJob).getBuildByNumber(buildNumber);
BuildWithDetails buildWithDetails = build.details();
```
Calling `build.details();` throws:
`java.lang.NullPointerException: Cannot invoke "com.offbytwo.jenkins.model.Build.details()" because "build" is null`

The job has 200+ builds, which I suspect may be the problem if Jenkins only returns at most 100 jobs.

The build is accessible using `getAllBuilds()` so my workaround is to use that method instead:

```
List allBuilds = jenkins.getJob(deployServicesJob).getAllBuilds();
Optional optional = allBuilds.stream().filter(b -> b.getNumber() == buildNumber).findFirst();
if (optional.isEmpty()) {
throw new IllegalArgumentException("Build not found");
}
Build build = optional.get();
```

Contributor guide

Open the contributing guide

Research direction

Start at the implementation of getBuildByNumber() and compare its behavior with getAllBuilds() for a job containing more than 200 builds. Reproduce the reported lookup using the Jenkins 2.277.1 and dependency 0.3.8 versions if available; done means an existing older build is returned instead of null.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
api
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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