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https://issues.apache.org/jira/browse/NIFI-4194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16520162#comment-16520162
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Tony Mao commented on NIFI-4194:
--------------------------------
At least, the issue is still observable in 1.6 version. Do we have any plan on
fixing this? Thanks.
> 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
> Priority: Major
> Labels: hostname, okhttp, security, tls
> Attachments: 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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