codecov step seems to have some issues with the GH api

[v1v]

Let's see whether the codecov step error shown below is related to the implementation or an environmental issue

[2019-07-03T11:48:30.377Z]  at githubBranchRef.call(githubBranchRef.groovy:32)
[2019-07-03T11:48:30.377Z]  at codecov.call(codecov.groovy:58)

Full stacktrace:

[2019-07-03T11:48:30.377Z] Also:   org.jenkinsci.plugins.workflow.steps.FlowInterruptedException
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.CpsBodyExecution.cancel(CpsBodyExecution.java:253)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.steps.BodyExecution.cancel(BodyExecution.java:76)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.steps.ParallelStepExecution.stop(ParallelStepExecution.java:67)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.steps.ParallelStep$ResultHandler$Callback.checkAllDone(ParallelStep.java:147)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.steps.ParallelStep$ResultHandler$Callback.onFailure(ParallelStep.java:134)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.CpsBodyExecution$FailureAdapter.receive(CpsBodyExecution.java:361)
[2019-07-03T11:48:30.377Z]      at com.cloudbees.groovy.cps.impl.ThrowBlock$1.receive(ThrowBlock.java:68)
[2019-07-03T11:48:30.377Z] Also:   org.jenkinsci.plugins.workflow.steps.FlowInterruptedException
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.CpsBodyExecution.cancel(CpsBodyExecution.java:253)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.steps.BodyExecution.cancel(BodyExecution.java:76)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.steps.ParallelStepExecution.stop(ParallelStepExecution.java:67)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.steps.ParallelStep$ResultHandler$Callback.checkAllDone(ParallelStep.java:147)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.steps.ParallelStep$ResultHandler$Callback.onFailure(ParallelStep.java:134)
[2019-07-03T11:48:30.377Z]      at org.jenkinsci.plugins.workflow.cps.CpsBodyExecution$FailureAdapter.receive(CpsBodyExecution.java:361)
[2019-07-03T11:48:30.377Z]      at com.cloudbees.groovy.cps.impl.ThrowBlock$1.receive(ThrowBlock.java:68)
[2019-07-03T11:48:30.377Z] java.lang.NullPointerException: Cannot get property 'repo' on null object
[2019-07-03T11:48:30.377Z]  at org.codehaus.groovy.runtime.NullObject.getProperty(NullObject.java:60)
[2019-07-03T11:48:30.377Z]  at org.codehaus.groovy.runtime.InvokerHelper.getProperty(InvokerHelper.java:174)
[2019-07-03T11:48:30.377Z]  at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.getProperty(ScriptBytecodeAdapter.java:456)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.sandbox.DefaultInvoker.getProperty(DefaultInvoker.java:39)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.impl.PropertyAccessBlock.rawGet(PropertyAccessBlock.java:20)
[2019-07-03T11:48:30.377Z]  at githubBranchRef.call(githubBranchRef.groovy:32)
[2019-07-03T11:48:30.377Z]  at codecov.call(codecov.groovy:58)
[2019-07-03T11:48:30.377Z]  at ___cps.transform___(Native Method)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.impl.PropertyishBlock$ContinuationImpl.get(PropertyishBlock.java:74)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.LValueBlock$GetAdapter.receive(LValueBlock.java:30)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.impl.PropertyishBlock$ContinuationImpl.fixName(PropertyishBlock.java:66)
[2019-07-03T11:48:30.377Z]  at sun.reflect.GeneratedMethodAccessor856.invoke(Unknown Source)
[2019-07-03T11:48:30.377Z]  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[2019-07-03T11:48:30.377Z]  at java.lang.reflect.Method.invoke(Method.java:498)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.impl.ConstantBlock.eval(ConstantBlock.java:21)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.Next.step(Next.java:83)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
[2019-07-03T11:48:30.377Z]  at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:129)
[2019-07-03T11:48:30.377Z]  at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:268)
[2019-07-03T11:48:30.377Z]  at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
[2019-07-03T11:48:30.377Z]  at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)
[2019-07-03T11:48:30.377Z]  at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:51)
[2019-07-03T11:48:30.377Z]  at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:186)
[2019-07-03T11:48:30.377Z]  at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:370)
[2019-07-03T11:48:30.377Z]  at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$200(CpsThreadGroup.java:93)
[2019-07-03T11:48:30.377Z]  at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:282)
[2019-07-03T11:48:30.377Z]  at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:270)
[2019-07-03T11:48:30.377Z]  at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:64)
[2019-07-03T11:48:30.377Z]  at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[2019-07-03T11:48:30.377Z]  at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
[2019-07-03T11:48:30.377Z]  at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
[2019-07-03T11:48:30.377Z]  at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
[2019-07-03T11:48:30.377Z]  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[2019-07-03T11:48:30.377Z]  at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[2019-07-03T11:48:30.377Z]  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[2019-07-03T11:48:30.377Z]  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[2019-07-03T11:48:30.377Z]  at java.lang.Thread.run(Thread.java:748)

Which might be related to

12:47:52  [WARN] makeGithubApiCall: The REST API call https://api.github.com/repos/elastic/apm-agent-java/pulls/699 return the message : java.lang.Exception: httpRequest: Failure connecting to the service https://api.github.com/repos/elastic/apm-agent-java/pulls/699 : httpRequest: Failure connecting to the service https://api.github.com/repos/elastic/apm-agent-java/pulls/699 : 
12:47:52  Code: 502
12:47:52  Error: {
12:47:52    "message": "Server Error"
12:47:52  }