jenkinsci / jenkinsci/java-client-api
getBuildByNumber() returns null when build exists
- Dominant language
- Java
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- 913
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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
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