Epipe Error

[justinz...@gmail.com]

Hi,

I am getting EPIPE error in the receiver app.

But the sender is able to send message to the same queue.

Here's the error in receiver app.

{ Error: write EPIPE
at exports._errnoException (util.js:1018:11)
 at WriteWrap.afterWrite (net.js:804:14)
code: 'EPIPE',
 errno: 'EPIPE',
syscall: 'write',
stackframes:
 [ { file_name: 'util.js', line_number: 1018 },
      { file_name: 'net.js', line_number: 804 } ] }

And after few minutes this error occurs.

Error: Heartbeat timeout
 at Heart.<anonymous> (/home/user/node_modules/amqplib/lib/connection.js:425:19)
   at emitNone (events.js:86:13)
  at Heart.emit (events.js:185:7)
  at Heart.runHeartbeat (/home/user/node_modules/amqplib/lib/heartbeat.js:88:17)
    at ontimeout (timers.js:380:14)
   at tryOnTimeout (timers.js:244:5)
   at Timer.listOnTimeout (timers.js:214:5)

What can be the reason for this?

Thanks in advance.

[Luke Bakken]

Hi Justin,

A good place to start is to look in the RabbitMQ logs for messages corresponding to about the same time as the EPIPE error. Do you see anything there?

Thanks,

Luke

[Michael Klishin]

Heartbeats are documented in [1]. It could be that something in your client

blocks the event loop and thus no heartbeats can be sent out.

How this is managed largely depends on the client library/programming language and their approaches to concurrency.

1. http://www.rabbitmq.com/heartbeats.html

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MK

Staff Software Engineer, Pivotal/RabbitMQ

[justinz...@gmail.com]

Hi,

Thank you Luke and Michael for your response.

The heartbeat error occurs after the EPIPE error.

So I guess the reason for the missed heartbeat is the EPIPE error.

But I am not able to find out why the EPIPE error is occurring.

Also there is nothing in the log file accept for the heartbeat error:

closing AMQP connection <0.23417.6> (127.0.0.1:XXXXX -> 127.0.0.1:XXXX):
Missed heartbeats from client, timeout: 60s

[Michael Klishin]

EPIPE is one of the I/O exceptions that mean that connection was interrupted.

The heartbeat mechanism then simply detects that, they are not directly related per se.

If you have a way to reliably reproduce this, take a traffic capture [1] and see what's going on at the TCP level.

1. http://www.rabbitmq.com/amqp-wireshark.html

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