The SSH Plugin seems to use Java 1.6 Methods

Parsing POMs
[SSH] executing pre build script:

FATAL: java.lang.String.isEmpty()Z
java.lang.NoSuchMethodError: java.lang.String.isEmpty()Z
at org.jvnet.hudson.plugins.SSHBuildWrapper.executePreBuildScript(SSHBuildWrapper.java:71)
at org.jvnet.hudson.plugins.SSHBuildWrapper.setUp(SSHBuildWrapper.java:64)
at hudson.maven.MavenModuleSetBuild$RunnerImpl.doRun(MavenModuleSetBuild.java:408)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:416)
at hudson.model.Run.run(Run.java:1243)
at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:304)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:122)

Not sure whether this should be considered a bug but it prevents our Hudson from successfull building.