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https://issues.apache.org/jira/browse/NIFI-4194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nathan Gough updated NIFI-4194:
-------------------------------
    Attachment: Screen Shot 2018-07-12 at 4.39.27 PM.png

> NullPointerException in InvokeHTTP processor when trusted hostname property 
> is used
> -----------------------------------------------------------------------------------
>
>                 Key: NIFI-4194
>                 URL: https://issues.apache.org/jira/browse/NIFI-4194
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Extensions
>    Affects Versions: 1.3.0
>            Reporter: Andy LoPresto
>            Assignee: Nathan Gough
>            Priority: Major
>              Labels: hostname, okhttp, security, tls
>         Attachments: Screen Shot 2018-07-12 at 3.29.50 PM.png, Screen Shot 
> 2018-07-12 at 4.39.27 PM.png, flow_20170717-192339_trusted_hostname.xml
>
>
> When a user configures the {{InvokeHTTP}} processor with HTTPS (using an 
> {{SSLContextService}}) and populates the {{trustedHostname}} property, the 
> processor will throw a {{NullPointerException}} because the OkHttp client 
> does not have a valid {{HostnameVerifier}} configured when the 
> {{@OnScheduled}} method is called and that verifier is delegated to the 
> processor. This results in the stacktrace below:
> {code}
> 2017-07-17 19:15:49,341 ERROR [Timer-Driven Process Thread-6] 
> o.a.nifi.processors.standard.InvokeHTTP 
> InvokeHTTP[id=53784003-015d-1000-ffb0-e07173729c9c] Routing to Failure due to 
> exception: java.lang.NullPointerException: java.lang.NullPointerException
> java.lang.NullPointerException: null
>       at 
> org.apache.nifi.processors.standard.InvokeHTTP$OverrideHostnameVerifier.verify(InvokeHTTP.java:1050)
>       at 
> com.squareup.okhttp.internal.io.RealConnection.connectTls(RealConnection.java:192)
>       at 
> com.squareup.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:145)
>       at 
> com.squareup.okhttp.internal.io.RealConnection.connect(RealConnection.java:108)
>       at 
> com.squareup.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:184)
>       at 
> com.squareup.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:126)
>       at 
> com.squareup.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:95)
>       at 
> com.squareup.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:283)
>       at 
> com.squareup.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:224)
>       at com.squareup.okhttp.Call.getResponse(Call.java:286)
>       at 
> com.squareup.okhttp.Call$ApplicationInterceptorChain.proceed(Call.java:243)
>       at 
> com.squareup.okhttp.Call.getResponseWithInterceptorChain(Call.java:205)
>       at com.squareup.okhttp.Call.execute(Call.java:80)
>       at 
> org.apache.nifi.processors.standard.InvokeHTTP.onTrigger(InvokeHTTP.java:630)
>       at 
> org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
>       at 
> org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1120)
>       at 
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:147)
>       at 
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
>       at 
> org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:132)
>       at 
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>       at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
>       at 
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
>       at 
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>       at java.lang.Thread.run(Thread.java:745)
> {code}
> When that method is invoked, the existence of the {{HostnameVerifier}} should 
> be checked before it is provided to the {{OverrideHostnameVerifier}}, and a 
> default value of {{OkHostnameVerifier.INSTANCE}} (public static singleton) 
> should be provided if none is available.



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