TypeError: Cannot read property 'write' of null at node_modules/nodestalker/lib/beanstalk_client.js:254:15

[otobrglez]

Hey guys!

I'm using nodestalker@0.1.18 and from time to time I get this error. Error that crashes my Node.js process,...

TypeError: Cannot read property 'write' of null
  at <dir>/node_modules/nodestalker/lib/beanstalk_client.js:254:15
  at process._tickDomainCallback (node.js:381:11)

Any idea what is going on or how can I fix this?

This is how I'm using nodestalker:

bsClient = bs.Client(config.get('beanstalkd:host') + ':' + config.get('beanstalkd:port'))
.on 'error', (err)->
  log.error err
  process.exit(1)

putOnTube = (tubeName, payload, priority, delay, ttr, client, callback)->
  try
    client.use(tubeName).onError (err)->
      callback(err, null)
      return
    .onSuccess (pom)->
      pom = null
      client
      .put(payload, priority, delay, ttr)
      .onError (err)->
        callback(err, null)
        return
      .onSuccess (data)->
        client.disconnect()
        callback(null, data)
        return
      return
  catch error
    log.error(error)
    pmx.notify(error)
    callback(error, null)
  return

# Somewhere...
putOnTube 'my_tube', JSON.stringify(is_ok: "ok"), 0, 0, 60, bsClient, callback

Thank you for your comments and effort!

• Oto

[pascalopitz]

https://github.com/pascalopitz/nodestalker/blob/master/lib/beanstalk_client.js#L254

I would say that somehow the connection variable gets lost, as in
_self.conn is set to null. Maybe this is because _self is not capturing the
right scope anymore?

What version of node are you on, have you got a test case to isolate this,
etc etc?

On 28 October 2015 at 19:32, Oto Brglez notifications@github.com wrote:

Hey guys!

I'm using nodestalker@0.1.18 https://github.com/pascalopitz/nodestalker
and from time to time I get this error. Error that crashes my Node.js
process,...

TypeError: Cannot read property 'write' of null
at

/node_modules/nodestalker/lib/beanstalk_client.js:254:15
at process._tickDomainCallback (node.js:381:11)

Any idea what is going on or how can I fix this?

This is how I'm using nodestalker:

bsClient = bs.Client(config.get('beanstalkd:host') + ':' + config.get('beanstalkd:port'))
.on 'error', (err)->
log.error err
process.exit(1)
putOnTube = (tubeName, payload, priority, delay, ttr, client, callback)->
try
client.use(tubeName).onError (err)->
callback(err, null)
return
.onSuccess (pom)->
pom = null
client
.put(payload, priority, delay, ttr)
.onError (err)->
callback(err, null)
return
.onSuccess (data)->
client.disconnect()
callback(null, data)
return
return
catch error
log.error(error)
pmx.notify(error)
callback(error, null)
return

Somewhere...putOnTube 'my_tube', JSON.stringify(is_ok: "ok"), 0, 0, 60, bsClient, callback

Thank you for your comments and effort!

• Oto

—
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#23.

[ericcumbee]

running into a very similar if not identical error. node v0.10.33

/Users/ericcumbee/Desktop/#########/########/node_modules/nodestalker/lib/beanstalk_client.js:292
                _self.conn.write(cmd.command());
                           ^
TypeError: Cannot call method 'write' of null
    at /Users/ericcumbee/Desktop/######/#####/node_modules/nodestalker/lib/beanstalk_client.js:292:16
    at process._tickCallback (node.js:419:13)

[pascalopitz]

Can you attach a debugger and look at what self is a that stage?
On 13 Nov 2015 12:07, "Eric Cumbee" notifications@github.com wrote:

running into a very similar if not identical error. node v0.10.33

/Users/ericcumbee/Desktop/#########/########/node_modules/nodestalker/lib/beanstalk_client.js:292
_self.conn.write(cmd.command());
^
TypeError: Cannot call method 'write' of null
at /Users/ericcumbee/Desktop/######/#####/node_modules/nodestalker/lib/beanstalk_client.js:292:16
at process._tickCallback (node.js:419:13)

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Reply to this email directly or view it on GitHub
#23 (comment)
.

[siddo420]

Similar issue the first time I tried using this module. I am on node 5.10 and whatever the latest is for module (from last night).

Here is my code:

    Beanstalkd       = require( 'nodestalker'           ).Client('127.0.0.1:11300')
....
                Beanstalkd.use( 'queue' )
                  .onSuccess( function( data ){
                    Beanstalkd.put( job ).onSuccess( function( data ){
                      Logger.debugc( data );          // prints 1 or sometimes 2
                      Beanstalkd.disconnect();
                    }).onError( function( err ){
                      //never gets called
           });
                  }).onError( function( err ){
                     //never gets called
        });

I dont know how to use the debugger but did object.keys on _self and got the following:

["domain","_events","_eventsCount","_maxListeners","address","port","isRaw","default_priority","reserve_multichunk_timeout","queue","waitingForResponses","conn","waitingForResponse"]

Code that throws error:

            process.nextTick(function() {
              console.log(JSON.stringify(Object.keys( _self )));
                _self.conn.write(cmd.command());   // <--- err is thrown here
            });

[dimonchoo]

removing client.disconnect() from my code was help me =)