If I have a matrix job run and it fails, then the next job or two attempted will also fail.
Output from master job:
{{
16:50:56 Started by user jschewe
16:50:56 Building on master
16:50:56 Checkout:workspace / /nfshomes/hudson/.hudson/jobs/build-matrix/workspace - hudson.remoting.LocalChannel@449764b
16:50:56 Using strategy: Default
16:50:56 Last Built Revision: Revision c935addc3502b2a49a0642f3e545241f4193a53d (origin/jschewe-dev)
16:50:56 Checkout:workspace / /nfshomes/hudson/.hudson/jobs/build-matrix/workspace - hudson.remoting.LocalChannel@449764b
16:50:56 Fetching changes from the remote Git repository
16:50:56 Fetching upstream changes from git@gitserver:repo.git
16:50:56 Seen branch in repository origin/jschewe-dev
16:50:56 Seen branch in repository origin/master
16:50:56 Commencing build of Revision c935addc3502b2a49a0642f3e545241f4193a53d (origin/jschewe-dev)
16:50:56 Checking out Revision c935addc3502b2a49a0642f3e545241f4193a53d (origin/jschewe-dev)
16:50:56 Triggering cygwin
16:51:01 FATAL: null
16:51:01 java.lang.NullPointerException
16:51:01 at hudson.plugins.tasks.TasksAnnotationsAggregator.endRun(TasksAnnotationsAggregator.java:62)
16:51:01 at hudson.matrix.MatrixBuild$RunnerImpl.waitForCompletion(MatrixBuild.java:299)
16:51:01 at hudson.matrix.MatrixBuild$RunnerImpl.doRun(MatrixBuild.java:234)
16:51:01 at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:423)
16:51:01 at hudson.model.Run.run(Run.java:1362)
16:51:01 at hudson.matrix.MatrixBuild.run(MatrixBuild.java:152)
16:51:01 at hudson.model.ResourceController.execute(ResourceController.java:88)
16:51:01 at hudson.model.Executor.run(Executor.java:145)
16:51:01 at hudson.model.OneOffExecutor.run(OneOffExecutor.java:66)
}}

Output from child job:
{{
16:50:56 Started by upstream project "build-matrix" build number 14
16:50:56 Building remotely on gull
16:50:56 Checkout:cygwin / d:/cygwin/home/hudson/workspace/build-matrix/label/cygwin - hudson.remoting.Channel@50ea9f6e:gull
16:50:56 Using strategy: Default
16:50:56 Last Built Revision: Revision 481cbee466ebe9d2026eb07aba63c9581cb2d18c (origin/jschewe-dev)
16:50:56 Checkout:cygwin / d:\cygwin\home\hudson\workspace\build-matrix\label\cygwin - hudson.remoting.LocalChannel@6b05f5
16:50:56 Fetching changes from the remote Git repository
16:50:56 Fetching upstream changes from git@gitserver:repo.git
16:50:58 ERROR: Problem fetching from origin / origin - could be unavailable. Continuing anyway
16:50:58 FATAL: Could not fetch from any repository
16:50:58 ERROR: Could not fetch from any repositoryhudson.plugins.git.GitException: Could not fetch from any repository
16:50:58 at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:852)
16:50:58 at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:812)
16:50:58 at hudson.FilePath$FileCallableWrapper.call(FilePath.java:1944)
16:50:58 at hudson.remoting.UserRequest.perform(UserRequest.java:118)
16:50:58 at hudson.remoting.UserRequest.perform(UserRequest.java:48)
16:50:58 at hudson.remoting.Request$2.run(Request.java:270)
16:50:58 at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
16:50:58 at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
16:50:58 at java.util.concurrent.FutureTask.run(Unknown Source)
16:50:58 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
16:50:58 at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
16:50:58 at java.lang.Thread.run(Unknown Source)
}}