Andy LoPresto created NIFI-4194:
-----------------------------------
Summary: 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
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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