Part of the stack trace below. It seems like the serialization attemps to invoke the methods of the bean and several NPE's are thrown.

java.lang.NullPointerException
at edu.illinois.ncsa.cyberintegrator.executor.hpc.HPCExecutor.updateJobInfo(HPCExecutor.java:830)
at edu.illinois.ncsa.cyberintegrator.executor.hpc.HPCExecutor.getGondolaLogFile(HPCExecutor.java:701)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.get(BeanPropertyWriter.java:552)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:429)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:525)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:143)
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:118)
at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:24)
at com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:150)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:163)
at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:423)
at com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider.writeTo(JacksonJsonProvider.java:578)
at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:117)
at org.jboss.resteasy.plugins.interceptors.encoding.GZIPEncodingInterceptor.write(GZIPEncodingInterceptor.java:104)
at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:123)
at org.jboss.resteasy.core.ServerResponse.writeTo(ServerResponse.java:250)
at org.jboss.resteasy.core.SynchronousDispatcher.writeJaxrsResponse(SynchronousDispatcher.java:596)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:517)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:125)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)