Code changed in jenkins
User: StevenGBrown
Path:
src/main/java/hudson/plugins/timestamper/TimestampFormatter.java
src/test/java/hudson/plugins/timestamper/TimestampFormatterTest.java
http://jenkins-ci.org/commit/timestamper-plugin/4029ac433521b354014aeb730509acd9e61e10e6
Log:
[FIXED JENKINS-16778] Allow for a null stapler request

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Fix included in Timestamper 1.5.3 release.

I think this is still an issue:
When a slave is taken temporary offline, at the end of a build a NullPointer Exception is thrown at
src/main/java/hudson/plugins/timestamper/annotator/TimestampAnnotatorFactory.java (line 65).

String path = request.getPathInfo();

So I think request is null.

Code changed in jenkins
User: StevenGBrown
Path:
src/main/java/hudson/plugins/timestamper/annotator/TimestampAnnotatorFactory.java
http://jenkins-ci.org/commit/timestamper-plugin/8317afcb23693e91b21e2330577dcba2db2d1058
Log:
Merge pull request #3 from jdewinne/master

JENKINS-16778: Timestamper makes the build fail if the slave is put offline during the build.

Compare: https://github.com/jenkinsci/timestamper-plugin/compare/09ec70200054...8317afcb2369

I can definitely confirm what Joris stated.

The bug is still not fixed. If you mark a node as temporarily offline while a build is running, the Timestamper plugin will still throw an NPE:
---------------------------------------------
10:16:03 Looks like the node went offline during the build. Check the slave log for the details.FATAL: null
10:16:03 java.lang.NullPointerException
10:16:03 at hudson.plugins.timestamper.annotator.TimestampAnnotatorFactory.getOffset(TimestampAnnotatorFactory.java:65)
10:16:03 at hudson.plugins.timestamper.annotator.TimestampAnnotatorFactory.newInstance(TimestampAnnotatorFactory.java:52)
10:16:03 at hudson.console.ConsoleAnnotator._for(ConsoleAnnotator.java:143)
10:16:03 at hudson.console.ConsoleAnnotator.initial(ConsoleAnnotator.java:133)
10:16:03 at hudson.console.AnnotatedLargeText.createAnnotator(AnnotatedLargeText.java:140)
10:16:03 at hudson.console.AnnotatedLargeText.writeHtmlTo(AnnotatedLargeText.java:157)
10:16:03 at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:605)
10:16:03 at hudson.model.Run.execute(Run.java:1568)
[...]
---------------------------------------------

One thing to note is that this happens right in the middle of a build-step in our case. It will cause whatever is currently running to abort.

I hope this can help you track down the issue.

Martin,

I've implemented a fix for this. So this will be fixed with the next release of the plugin. If you want you can checkout the code and use the latest version from github.

Regards,
Joris