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java.lang.NullPointerException: reason	at feign.Util.checkNotNull(Util.java:104)	at feign.Response.(Response.java:49)	at feign.Response.create(Response.java:60)	at feign.Client$Default.convertResponse(Client.java:171)	at feign.Client$Default.execute(Client.java:72)	at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:95)	at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:74)	at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:94)	at com.sun.proxy.$Proxy108.updateApp(Unknown Source)	at com.mesosphere.velocity.marathon.impl.MarathonBuilderImpl.update(MarathonBuilderImpl.java:71)	at com.mesosphere.velocity.marathon.MarathonStep$MarathonStepExecution.run(MarathonStep.java:162)	at com.mesosphere.velocity.marathon.MarathonStep$MarathonStepExecution.run(MarathonStep.java:143)	at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousStepExecution.start(AbstractSynchronousStepExecution.java:40)	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:184)	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:126)	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:120)	at groovy.lang.GroovyObject$invokeMethod.call(Unknown Source)	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:151)	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:21)	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:115)	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:149)	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:146)	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:123)	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:123)	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:16)	at WorkflowScript.run(WorkflowScript:16)	at ___cps.transform___(Native Method)	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:48)	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)	at sun.reflect.GeneratedMethodAccessor875.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)	at com.cloudbees.groovy.cps.impl.CollectionLiteralBlock$ContinuationImpl.dispatch(CollectionLiteralBlock.java:55)	at com.cloudbees.groovy.cps.impl.CollectionLiteralBlock$ContinuationImpl.item(CollectionLiteralBlock.java:45)	at sun.reflect.GeneratedMethodAccessor882.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:103)	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)	at sun.reflect.GeneratedMethodAccessor875.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:50)	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:82)	at sun.reflect.GeneratedMethodAccessor875.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)	at com.cloudbees.groovy.cps.impl.ConstantBlock.eval(ConstantBlock.java:21)	at com.cloudbees.groovy.cps.Next.step(Next.java:58)	at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:154)	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:33)	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:30)	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:30)	at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:164)	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:324)	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$100(CpsThreadGroup.java:78)	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:236)	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:224)	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:47)	at java.util.concurrent.FutureTask.run(FutureTask.java:262)	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)	at java.util.concurrent.FutureTask.run(FutureTask.java:262)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:745)