AjpClientConnection$ClientReceiveListener.handleEvent throws NPE

2023-02-19 02:54:36,119 ERROR [io.undertow.client] (default I/O-8) UT005001: An exception occurred processing the request: java.lang.NullPointerException
	at io.undertow.core@2.3.4.Final//io.undertow.client.ajp.AjpClientConnection$ClientReceiveListener.handleEvent(AjpClientConnection.java:380)
	at io.undertow.core@2.3.4.Final//io.undertow.client.ajp.AjpClientConnection$ClientReceiveListener.handleEvent(AjpClientConnection.java:356)
	at org.jboss.xnio@3.8.8.Final//org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at io.undertow.core@2.3.4.Final//io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:959)
	at io.undertow.core@2.3.4.Final//io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:939)
	at org.jboss.xnio@3.8.8.Final//org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at org.jboss.xnio@3.8.8.Final//org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
	at org.jboss.xnio.nio@3.8.8.Final//org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
	at org.jboss.xnio.nio@3.8.8.Final//org.xnio.nio.WorkerThread.run(WorkerThread.java:591)