Infinite loop in :
package io.undertow.protocols.ssl;

public class SslConduit implements StreamSourceConduit, StreamSinkConduit {

try {
SSLEngineResult result = null;
while (result == null || (result.getHandshakeStatus() == SSLEngineResult.HandshakeStatus.NEED_WRAP && result.getStatus() != SSLEngineResult.Status.BUFFER_OVERFLOW))

{ if (userBuffers == null) { result = engine.wrap(EMPTY_BUFFER, wrappedData.getBuffer()); }

else

{ result = engine.wrap(userBuffers, off, len, wrappedData.getBuffer()); }

}

----------

package io.undertow.server;

/**

A byte buffer pool that supports reference counted pools.
*
TODO: move this somewhere more appropriate
*
@author Stuart Douglas
*/
public class DefaultByteBufferPool implements ByteBufferPool {

...

@Override
public ByteBuffer getBuffer()

{ if(referenceCount == 0) { throw UndertowMessages.MESSAGES.bufferAlreadyFreed(); }

return buffer;
}

Looping on while condition with the following state :

HandshakeStatus = NEED_WRAP / Status = OK / bytesConsumed = 0 / bytesProduced = 0

Stake trace :

"XNIO-1 I/O-1" #25 prio=5 os_prio=0 cpu=3989340.17ms elapsed=64540.00s tid=0x00007fcd60cd7000 nid=0x7c0f runnable [0x00007fcd29a56000]
java.lang.Thread.State: RUNNABLE
at io.undertow.protocols.ssl.SslConduit.doWrap(SslConduit.java:898)
at io.undertow.protocols.ssl.SslConduit.doUnwrap(SslConduit.java:671)
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.HttpReadListener.handleEventWithNoRunningRequest(HttpReadListener.java:158)
at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:136)
at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:59)
at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
at io.undertow.protocols.ssl.SslConduit$SslReadReadyHandler.readReady(SslConduit.java:1175)
at io.undertow.protocols.ssl.SslConduit$SslWriteReadyHandler.writeReady(SslConduit.java:1250)
at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:93)
at org.xnio.nio.WorkerThread.run(WorkerThread.java:561)