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  1. XNIO
  2. XNIO-350

xnio.nio.alt-queued-server breaks undertow ssl under load

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      I can locally reproduce this failure using a jmh benchmark where the client is configured not to use persistent connections:

      ERROR [2019-10-04T14:21:22.321Z] io.undertow.request: Closing SSLConduit after exception on handshake
javax.net.ssl.SSLProtocolException: Handshake message sequence violation, 1
	at sun.security.ssl.Handshaker.checkThrown(Handshaker.java:1530)
	at sun.security.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:528)
	at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:802)
	at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:766)
	at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624)
	at com.palantir.tritium.metrics.InstrumentedSslEngine.unwrap(InstrumentedSslEngine.java:135)
	at io.undertow.protocols.ssl.SslConduit.doUnwrap(SslConduit.java:757)
	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$5$1.run(SslConduit.java:1084)
	at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:612)
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:479)
Caused by: javax.net.ssl.SSLProtocolException: Handshake message sequence violation, 1
	at sun.security.ssl.HandshakeStateManager.check(HandshakeStateManager.java:362)
	at sun.security.ssl.ServerHandshaker.processMessage(ServerHandshaker.java:212)
	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037)
	at sun.security.ssl.Handshaker$1.run(Handshaker.java:970)
	at sun.security.ssl.Handshaker$1.run(Handshaker.java:967)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1459)
	at io.undertow.protocols.ssl.SslConduit$5.run(SslConduit.java:1072)
	at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1871)
	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1451)
	at java.lang.Thread.run(Thread.java:748)

      This error is from a running service, and began to appear after upgrading xnio. Downgrading XNIO resolved the issue. In my synthetic reproducer I was able to resolve hte issue by setting the xnio.nio.alt-queued-server jvm property to false (unfortunately baked into an internal code-base, I can put together a smaller public reproducer this weekend or next week if that's helpful)

      java.io.IOException: overflow
	at io.undertow.protocols.ssl.SslConduit.doWrap(SslConduit.java:911)
	at io.undertow.protocols.ssl.SslConduit.doHandshake(SslConduit.java:649)
	at io.undertow.protocols.ssl.SslConduit.access$900(SslConduit.java:63)
	at io.undertow.protocols.ssl.SslConduit$5$1.run(SslConduit.java:1084)
	at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:612)
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:479)

              dlloyd@redhat.com David Lloyd
              carterkozak Carter Kozak (Inactive)
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                Updated:
                Resolved: