The restart buttons do no appear in the web frontend with the following in the logs:

WARNING: Failed to install embedded lifecycle implementation
java.io.EOFException
at java.io.RandomAccessFile.readInt(RandomAccessFile.java:725)
at com.sun.akuma.JavaVMArguments.ofSolaris(JavaVMArguments.java:206)
at com.sun.akuma.JavaVMArguments.of(JavaVMArguments.java:83)
at com.sun.akuma.JavaVMArguments.current(JavaVMArguments.java:69)
at hudson.lifecycle.UnixLifecycle.<init>(UnixLifecycle.java:52)
at hudson.lifecycle.Lifecycle.get(Lifecycle.java:93)
at hudson.model.Hudson.getLifecycle(Hudson.java:1773)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)

Is there a missing lib*.so file on OpenSolaris?