Nexus 3.41.0 NPE error when using docker proxy without supplying Host header - Sonatype Nexus Repository - Sonatype Community

Nexus 3.41.0 NPE error when using docker proxy without supplying Host header

Hello there,

We are running nexus as a docker proxy for docker hub, and are experiencing NullPointerExceptions when we try to pull images though the proxy.

`*SYSTEM org.eclipse.jetty.server.HttpChannel - /v2/
java.lang.NullPointerException: null
    at org.sonatype.nexus.bootstrap.jetty.DockerSubdomainRepositoryMapping.get(DockerSubdomainRepositoryMapping.java:27)
    at org.sonatype.nexus.bootstrap.jetty.DockerSubdomainRequestCustomizer.customize(DockerSubdomainRequestCustomizer.java:35)
    at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:384)
    at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
    at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:386)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
    at java.lang.Thread.run(Thread.java:750)

Hi Richard,

Sorry for this experience. It appears that there are two issues here: