Trouble sending results to graphite

[Craig Erdmann]

I'm a new gatling user and am attempting to send results to graphite. I'm using Gatling 2.0.0-RC2 running on an ubuntu box (virtual with only Gatling installed).

My Gatling.conf relevant section looks like this:

       data {

               writers = "console, file, graphite"

               reader = file

               console {

                       light = false

               }

       }

       graphite {

               host = "x.x.x.x"

               port = 2003

               light = false

               protocol = "tcp"

               rootPathPrefix = "gatling"

               bucketWidth = 100

               bufferSize = 8192

       }

On my graphite box, I have:

Carbon.conf

[cache]

LOCAL_DATA_DIR = /opt/graphite/storage/whisper/

USER =

MAX_CACHE_SIZE = inf

MAX_UPDATES_PER_SECOND = 1000

MAX_CREATES_PER_MINUTE = inf

LINE_RECEIVER_INTERFACE = 0.0.0.0

LINE_RECEIVER_PORT = 2003

PICKLE_RECEIVER_INTERFACE = 127.0.0.1

PICKLE_RECEIVER_PORT = 2004

CACHE_QUERY_INTERFACE = 127.0.0.1

CACHE_QUERY_PORT = 7002

LOG_UPDATES = True

storage-schemas.conf

[stats]

pattern = ^stats\..*

priority = 100

retentions = 10s:7d,1m:31d,10m:5y

[Gatling stats]

priority = 110

pattern = ^gatling\..*

retentions = 1s:6d,10s:60d

[catchall]

pattern = ^.*

priority = 0

retentions = 60s:5y

storage-aggregation.conf

[sum]

pattern = \.count$

xFilesFactor = 0

aggregationMethod = sum

[min]

pattern = \.min$

xFilesFactor = 0.1

aggregationMethod = min

[max]

pattern = \.max$

xFilesFactor = 0.1

aggregationMethod = max

[default_average]

pattern = .*

xFilesFactor = 0.3

aggregationMethod = average

On the gatling machine, I can issue the command (using the same user under which i run gatling.sh):

  echo "gatling.myapp.datapoint2 15 `date -d -${value}min +%s`" | nc  x.x.x.x 2003

This command executes and I can see the results in graphite

However, when i attempt to run gatling.sh and choose the computerdatabase.BasicSimulation simulation, I receive this error:

Simulation computerdatabase.BasicSimulation started...

[ERROR] [08/19/2014 15:31:39.616] [GatlingSystem-akka.actor.default-dispatcher-8] [akka://GatlingSy

stem/user/$y/$a] Connection refused

akka.actor.ActorInitializationException: exception during creation

        at akka.actor.ActorInitializationException$.apply(Actor.scala:164)

        at akka.actor.ActorCell.create(ActorCell.scala:596)

        at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:456)

        at akka.actor.ActorCell.systemInvoke(ActorCell.scala:478)

        at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:263)

        at akka.dispatch.Mailbox.run(Mailbox.scala:219)

        at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scal

a:393)

        at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)

        at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)

        at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)

        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

Caused by: java.net.ConnectException: Connection refused

        at java.net.PlainSocketImpl.socketConnect(Native Method)

        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)

        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)

        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

        at java.net.Socket.connect(Socket.java:579)

        at java.net.Socket.connect(Socket.java:528)

        at java.net.Socket.<init>(Socket.java:425)

        at java.net.Socket.<init>(Socket.java:208)

        at io.gatling.metrics.sender.TcpSender.<init>(TcpSender.scala:27)

        at io.gatling.metrics.sender.MetricsSender$.newMetricsSender(MetricsSender.scala:23)

        at io.gatling.metrics.GraphiteSender.preStart(GraphiteDataWriter.scala:99)

        at akka.actor.Actor$class.aroundPreStart(Actor.scala:470)

        at io.gatling.core.akka.BaseActor.aroundPreStart(BaseActor.scala:23)

        at akka.actor.ActorCell.create(ActorCell.scala:580)

        ... 9 more

[INFO] [08/19/2014 15:31:39.635] [GatlingSystem-akka.actor.default-dispatcher-2] [akka://GatlingSys

tem/user/$y/$a] Message [io.gatling.metrics.SendMetrics] from Actor[akka://GatlingSystem/user/$y#13

20734734] to Actor[akka://GatlingSystem/user/$y/$a#1979925254] was not delivered. [1] dead letters

encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-

letters' and 'akka.log-dead-letters-during-shutdown'.

The simulation runs fine, except for sending the metrics to Graphite. I'm assuming i have something not configured properly, any ideas?

Thanks,

Craig 

[Alex Bagehot]

Hi Craig,

If there's no logging to show what ip/port is being refused you can use strace to attach to the process to output what is happening at the system call level ie. What exact connection refused.

Likelihood is your gatling conf not being picked up.
Have you double checked

http://gatling.io/docs/2.0.0-RC2/general/configuration.html?highlight=command#gatling-conf

?

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[Pierre DAL-PRA]

Hi Craig,

As you have to choose between UDP or TCP with Gatling's Graphite writer, please check in carbon.conf that you've only enabled TCP and not UDP on port 2003.

Cheers,

Pierre

[Craig Erdmann]

Thanks for the help. Turns out it was a configuration error. On the documentation page: 

http://gatling.io/docs/2.0.0-RC2/graphite/index.html

It shows: 

Configuration of Gatling

In $GATLING_HOME/conf/gatling.conf, be sure to :

• have the GraphiteDataWriter in the list of writers
• have the correct host and port for Graphite

data {
  writers = "console, file, graphite"
  reader = file
}

graphite {
        host = "192.168.56.101"
        port = 2003
        #light = false              # only send the all* stats
        #protocol = "tcp"           # Choose between 'tcp' or 'udp'
        #rootPathPrefix = "gatling"
        #bucketWidth = 100
        #bufferSize = 8192
      }

The graphite node needs to be contained within data, not separate. Therefore, I fixed my config file to look like this, and it now works:

       data {

               writers = "console, file, graphite"

               reader = file

               console {

                       light = false

               }

       graphite {

               host = "x.x.x.x"

               port = 2003

               light = false

               protocol = "tcp"

               rootPathPrefix = "gatling"

               bucketWidth = 100

               bufferSize = 8192

       }

       }

--Craig 

[Craig Erdmann]

Created pull request to change documentation: 

https://github.com/gatling/gatling/pull/2108

[Carlos Torres]

Thanks! I had the same problem.