ZeroMQ : 4.2.0 : Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state

[BalajiPolisetty2207]

ZeroMQ : 4.2.0 : Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state.
we are using ZeroMQ from past 4 years and it is working fine till now as per new standards we have updated our android application to use Clang compiler instead of GCC and ZeroMQ is compiled using GCC still. we are getting above error when we changed to Clang compiler. Can some please share how i can resolve this is blocking our release.

[bluca]

The EFSM error means that the application is violating the strict 1 request - 1 reply pattern with ZMQ_REQ/ZMQ_REP sockets. Is this what's happening?

[BalajiPolisetty2207]

Before changing the compiler from gcc to clang everything is working upon changing we are seeing the issue.

Logs are coming like this
2019-01-02 16:45:46.384 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:10692/sample/MobileApp"
2019-01-02 16:45:51.317 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:7367/sample/MobileApp"
2019-01-02 16:45:56.354 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:8023/sample/MobileApp"
2019-01-02 16:46:02.093 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:16061/sample/MobileApp"
2019-01-02 16:46:08.071 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:2505/sample/MobileApp"
2019-01-02 16:46:14.354 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:5390/sample/MobileApp"
2019-01-02 16:46:20.223 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:10983/sample/MobileApp"
2019-01-02 16:46:25.924 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:10471/sample/MobileApp"
2019-01-02 16:46:30.601 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:10471/sample/MobileApp"
2019-01-02 16:46:31.829 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:16368/sample/MobileApp"
2019-01-02 16:46:36.565 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:16368/sample/MobileApp"
2019-01-02 16:46:39.531 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:4334/sample/MobileApp"
2019-01-02 16:46:45.220 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:10287/sample/MobileApp"
2019-01-02 16:46:51.049 PID:00000E8A TID:DD9CC920 [MessagingLib] Register application command received, application address="tcp://localhost:19770/sample/MobileApp"

2019-01-02 16:47:25.636 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:47:31.570 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:47:37.255 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:47:43.064 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:47:48.757 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:47:54.442 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:00.134 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:05.821 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:11.512 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:17.198 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:22.871 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:28.551 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:34.227 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:39.904 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:45.586 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:51.269 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:48:56.950 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:02.630 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:08.304 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:13.981 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:19.654 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:25.329 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:31.016 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:36.688 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:42.361 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:48.041 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:53.720 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:49:59.394 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:05.068 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:10.745 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:16.423 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:22.099 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:27.776 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:33.453 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:39.124 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:44.806 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:50.477 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:50:56.151 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:01.822 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:07.500 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:13.173 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:18.854 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:24.526 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:30.206 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:35.886 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:41.566 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:47.251 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:52.923 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:51:58.603 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:04.278 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:09.950 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:15.626 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:21.304 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:26.987 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:32.667 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:38.352 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:44.022 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:49.696 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:52:55.373 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:53:01.049 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:53:06.720 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:53:12.394 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:53:18.068 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:53:23.738 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:53:29.416 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:53:35.086 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state
2019-01-02 16:53:40.758 PID:00000E8A TID:DDA26920 [MessagingLib] Error detected while waiting for received reply ACK, ZMQ error: 156384763, Operation cannot be accomplished in current state

[BalajiPolisetty2207]

do we need to build the ZeroMQ with Clang compiler instead of GCC to solve this issue.
If yes can you please let us know how we can do this. Really thanks in advance.

[bluca]

The compiler should not be important - again, is the application following the strict request/reply pattern?

[BalajiPolisetty2207]

This application is developing long before i am not sure how i can check request/reply pattern. Can you please help how i can check this.

[bluca]

A ZMQ_REQ socket must exactly send a message, then receive a message, then send a message, then receive a message, and so on. A ZMQ_REP must to the opposite - receive a message, then send a message, and so on.
If this order is not followed, you get the error you are seeing.

[BalajiPolisetty2207]

I got your point. issue is observed only when we changed the compiler otherwise everything working smooth.

[BalajiPolisetty2207]

internal void OpenRequestSocket()
{
if (!Monitor.TryEnter(zmqRequestSocketLock, 20 * 1000))
throw new SkynaxException(API_ERROR_CODE.LOCK_SYNC_OBJECT, MessagingClient.GetErrorText(API_ERROR_CODE.LOCK_SYNC_OBJECT));

        try
		{
            try
            {
                // close existing socket if exists
                if (zmqRequestSocket != null)
                {
                    zmqRequestSocket.Close();
                    zmqRequestSocket = null;
                }
            }
            catch (Exception)
            {
            }

            if( zmqRequestSocket == null )
                // create new socket for send requests to the Skynax client
                zmqRequestSocket = new ZMQ.ZSocket(zmqContext, ZMQ.REQ);

            zmqRequestSocket.SendTimeOut = 3000;        // socket send method will timeout after 3 sec. if send operation fails
            zmqRequestSocket.ReceiveTimeOut = 3000;     // socket receive method will timeout after 3 sec. if no incomming message arrives
            zmqRequestSocket.Linger = 0;                // disable socket linger timeout

            // connect request's socket
            zmqRequestSocket.Connect(CreateAddrOfSystemRequestQueue(true));
        }
        finally
        {
            Monitor.Exit(zmqRequestSocketLock);
        }
    }

we are creating request socket as mentioned above is there any wrong in the above because i am not sure it is creating multiple requests without response received

[bluca]

The socket creation doesn't affect the FSM state, the sending/receiving part should be checked instead

[BalajiPolisetty2207]

Below is the sample for sendrequest. Please check is there any wrong.

internal void SendMessageToClient(IMessage msg, ZMQ.ZSocket socket, bool replyRequested)
{
string errorDescr;
API_ERROR_CODE errorCode = API_ERROR_CODE.ERROR;
XmlMessage receivedMsg;
int timeout = 0;

        if (msg.TimeToLive > 0)
        {
            if (msg.TimeToLive > MessageSendTimeout)
                timeout = MessageSendTimeout;
            else
                timeout = msg.TimeToLive;
        }
        else
            timeout = MessageSendTimeout;

		if( ApplicationID.Length < 1 )
			throw new Exception( API_ERROR_CODE.INVALID_MESSAGE_QUEUE_ID, GetErrorText( API_ERROR_CODE.INVALID_MESSAGE_QUEUE_ID ) );

		if( !clientInitialized )
			throw new Exception( API_ERROR_CODE.NOT_INITIALIZED, GetErrorText( API_ERROR_CODE.NOT_INITIALIZED ) );

		if (String.IsNullOrEmpty (msg.To ))
			msg.To = CreateAddrOfAppRequestQueue();
		if (String.IsNullOrEmpty (msg.From ))
			msg.From = CreateAddrOfAppReplyQueue();

        // generated unique message ID before send it
        ((Message)msg).GenerateMessageID();

        // set current send timestamp value
        ((Message)msg).SetSendTimestamp();

		// make XML message
		MemoryStream memoryStream = new MemoryStream();
		errorCode = ((Message)msg).CreateBinaryData (out memoryStream, out errorDescr);
		if( errorCode != API_ERROR_CODE.SUCCESS )
			throw new Exception( errorCode, errorDescr );

		try
		{
			Stopwatch  stopWatch = new Stopwatch();
			stopWatch.Start();

			// send message
			bool sent = false;
			while( !cancelRequested )
			{
				if( stopWatch.Elapsed.TotalSeconds > timeout )
				{
					throw new Exception( API_ERROR_CODE.TIMEOUT_EXPIRED, GetErrorText( API_ERROR_CODE.TIMEOUT_EXPIRED ) );
				}

				if( !sent  )
				{
                    try
                    {
                        // send message
                        if (socket.Send(memoryStream.ToArray(), 0))
                        {
                            sent = true;
                        }
                        else
                            Thread.Sleep(100);
                    }
                    catch (Java.Lang.RuntimeException javaException)
                    {
                        if (EFSMErrorDetected(javaException))
                        {
                            // an invalid socket state detected, try to reopen request socket
                            throw new Exception(API_ERROR_CODE.INVALID_SOCKET_STATE, GetErrorText(API_ERROR_CODE.INVALID_SOCKET_STATE));
                        }

                        Thread.Sleep(100);
                    }
                    catch (Exception)
                    {
                        Thread.Sleep(100);
                    }
				}

				if( sent )
				{
					if( !replyRequested )
						break;

                    byte[] data;

                    try
                    {
                        data = socket.Recv(0);
                    }
                    catch (Exception)
                    {
                        data = null;
                        Thread.Sleep(100);
                    }

                    if (data != null)
					{
                        if (data.Length == 0)
                        {
                            // "dummy" zero length message received, this message is used by the sender to try to correct invalid socket state on sender's side
                            continue;
                        }

						String xmlMessage;
						xmlMessage = Encoding.UTF32.GetString( Encoding.Convert( Encoding.UTF8, Encoding.UTF32, data ) );

						// check content type
						String contentType;
						errorCode = Message.GetContentTypeReceived( xmlMessage, out contentType, out errorDescr );
						if( errorCode != API_ERROR_CODE.SUCCESS )
						{
							// invalid message received
							continue;
						}

						if( String.Equals( contentType, "XmlMessage", StringComparison.OrdinalIgnoreCase ) )
						{
							receivedMsg = new XmlMessage();

							errorCode = receivedMsg.ParseMessage( xmlMessage, out errorDescr );
							if( errorCode != API_ERROR_CODE.SUCCESS )
							{
								// invalid message received
								receivedMsg = null;
								continue;
							}
						}
						else
						{
							// unimplemented content type received
							receivedMsg = null;
							continue;
						}

                        if (String.Equals(msg.MessageId, receivedMsg.CorrelationId, StringComparison.OrdinalIgnoreCase))
						{
							// parse message processing status

							// parse reply message body
							MSG_PROCESSING_STATUS  msgProcessingStatus;
							errorCode = ParseMessageProcessingStatus( receivedMsg.Xml, out msgProcessingStatus, out errorDescr );
							if( errorCode == API_ERROR_CODE.SUCCESS
								&& msgProcessingStatus.code == (int)API_ERROR_CODE.SUCCESS
								&& msgProcessingStatus.status == MSG_PROCESSING_STATUS.STATUS.QueuedForProcessing )
							{
								// message is queued for processing
								break;
							}
							else
							{
								if( errorCode != API_ERROR_CODE.SUCCESS )
								{
									// unable to parse message processing status
									throw new Exception( errorCode, errorDescr );
								}
								else
								{
									// unable to process message in  client
									throw new Exception( (API_ERROR_CODE)msgProcessingStatus.code, msgProcessingStatus.description );
								}
							}
						}

						receivedMsg = null;
						continue;
					}
				}
			}
		}
		catch( Exception e )
		{
			throw new Exception (e);
		}
		catch( ZMQException e )
		{
			throw new Exception( API_ERROR_CODE.ZMQ_ERROR, String.Format( GetErrorText( API_ERROR_CODE.ZMQ_ERROR ), e.ErrorCode, e.ToString() ) );
		}
		catch( Exception )
		{
			throw new Exception( API_ERROR_CODE.SEND_MESSAGE, GetErrorText( API_ERROR_CODE.SEND_MESSAGE ) );
		}
	}

[bluca]

From what I can understand (the formatting and indentation are a bit confusing) there are a few times in that loop where it can either continue or break if a receive fails for some reasons (given the socket creation adds a timeout, most likely due to that), which means it will go back to send without receiving. As mentioned multiple times and written in the docs, that's illegal.
Also there's:

if( !replyRequested )
	break;

Again, that's not allowed with req/rep.

[BalajiPolisetty2207]

can you please suggest how i can handle above error case ?

[bluca]

Have a look a the zguide: http://zguide.zeromq.org/

[BalajiPolisetty2207]

when we trying to build zeromq in linux environment and running make command we are seeing below error.

[exec] ZMQ.cpp:23:28: error: org_zeromq_ZMQ.h: No such file or directory
[exec] ZMQ.cpp:25: error: 'JNIEnv' was not declared in this scope
[exec] ZMQ.cpp:25: error: 'env' was not declared in this scope
[exec] ZMQ.cpp:25: error: 'jobject' was not declared in this scope
[exec] ZMQ.cpp:25: error: initializer expression list treated as compound expression
[exec] ZMQ.cpp:26: error: expected ',' or ';' before '{' token

Can you please help how i can resolve this. ?

[bluca]

That source file is not from the libzmq repository (and neither is that missing header), so I'm afraid I don't know how to help, sorry