NullPointerException - with SNI configured on IBM JDK 1.8 --------------------------------------------------------- Key: WFCORE-4303 URL: https://issues.jboss.org/browse/WFCORE-4303 Project: WildFly Core Issue Type: Bug Components: Security Environment: IBM JDK 1.8: {code} java version "1.8.0_181" Java(TM) SE Runtime Environment (build 8.0.5.20 - pxa6480sr5fp20-20180802_01(SR5 FP20)) IBM J9 VM (build 2.9, JRE 1.8.0 Linux amd64-64-Bit Compressed References 20180731_393394 (JIT enabled, AOT enabled) OpenJ9 - bd23af8 OMR - ca1411c IBM - 98805ca) JCL - 20180719_01 based on Oracle jdk8u181-b12 {code} Reporter: Jan Stourac Priority: Major When running with IBM JDK 1.8, there is an NPE during the request performed against https-listener which has configured 'server-ssl-sni-context' instance (when using standard 'server-ssl-context' no exception is present): {code} $ curl https://localhost:8443 -k curl: (35) OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to localhost:8443 {code} related exception in server.log: {code} 18:23:01,227 ERROR [io.undertow.request.io] (default I/O-6) UT005090: Unexpected failure: java.lang.NullPointerException at io.undertow.protocols.ssl.SslConduit.doUnwrap(SslConduit.java:772) at io.undertow.protocols.ssl.SslConduit.read(SslConduit.java:567) at org.xnio.conduits.ConduitStreamSourceChannel.read(ConduitStreamSourceChannel.java:127) at io.undertow.server.protocol.http.AlpnOpenListener$AlpnConnectionListener.handleEvent(AlpnOpenListener.java:348) at io.undertow.server.protocol.http.AlpnOpenListener.handleEvent(AlpnOpenListener.java:305) at io.undertow.server.protocol.http.AlpnOpenListener.handleEvent(AlpnOpenListener.java:64) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.ChannelListeners$10.handleEvent(ChannelListeners.java:291) at org.xnio.ChannelListeners$10.handleEvent(ChannelListeners.java:286) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.ChannelListeners$DelegatingChannelListener.handleEvent(ChannelListeners.java:1092) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.nio.QueuedNioTcpServer$1.run(QueuedNioTcpServer.java:131) at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:612) at org.xnio.nio.WorkerThread.run(WorkerThread.java:479) {code} When I switch to OpenSSL provider using {code} /subsystem=elytron/server-ssl-context=defaultSSC:write-attribute(name=providers,value=openssl) {code} then the exception disappears. ---- Note: sometimes I can also see shorter exception stacktrace: {code} 18:17:15,711 ERROR [io.undertow.request.io] (default I/O-2) UT005090: Unexpected failure: java.lang.NullPointerException at io.undertow.protocols.ssl.SslConduit.doUnwrap(SslConduit.java:772) at io.undertow.protocols.ssl.SslConduit.doHandshake(SslConduit.java:648) at io.undertow.protocols.ssl.SslConduit.access$900(SslConduit.java:63) at io.undertow.protocols.ssl.SslConduit$SslReadReadyHandler.readReady(SslConduit.java:1136) at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89) at org.xnio.nio.WorkerThread.run(WorkerThread.java:591) {code}