Riemann reporter doesn't appear to work

[yogsototh]

I use 2.7.0 version, the lein install doesn't appear to do anything or takes ages when I cloned this repository.

Mainly I see this in the logs:

2016-06-21 12:06:58,449 DEBUG (metrics-riemann-reporter-thread-1) [com.codahale.metrics.riemann.RiemannReporter] - Reporting metrics: for 1466503618 at 1466503618449

only once, and I can't see the data in Riemann.

Riemann appear to works as I tried to add metrics manually. I don't have any hint on how to make it works.

I use call this function at start time:

(defn init! []
 (let [host "127.0.0.1"
          port 5555
          riemann-client (riemann/make-riemann host port)
          riemann-reporter (riemann/reporter riemann-client
                                             {:rate-unit TimeUnit/SECONDS
                                              :duration-unit TimeUnit/MILLISECONDS
                                              :filter MetricFilter/ALL})]
      (log/debug (str "connecting to Riemann: " host ":" port))
      (riemann/start riemann-reporter 1)))

[michaelklishin]

Please inspect the JVM with VisualVM or similar. Only a thread dump can tell if the reporter is still running or had to abort e.g. due to an unhandled exception

[yogsototh]

Using VisualVM the metrics-riemann-reporter-thread-1 seems to be always parked.

Here is the riemann specific thread dump

"metrics-riemann-reporter-thread-1" #31 daemon prio=5 os_prio=31 tid=0x00007fad6b2b6800 nid=0x7203 waiting on condition [0x000070000227c000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x0000000772337e90> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
    at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1081)
    at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
    - None

I've provided the complete thread dump here but I'm not sure it will be useful:

https://www.wetransfer.com/downloads/2dc8849a6d70945154ffb3ef0e6bba1320160621112540/626feecd2fcf77e042b8a6da141b9b4220160621112540/f20e2e

[michaelklishin]

Parked by ScheduledThreadPoolExecutor specifically. This makes me believe something operates on a schedule that you don't expect, e.g. reporting interval is widely off.

[timgilbert]

~~Any update on this? I'm seeing the same behavior, can't get metrics to send anything to reimann at all.~~

EDIT: looks like I had a PEBKAC problem - I hadn't passed the correct registry value into (metrics.reporters.riemann/reporter). I corrected this and everything seems to be working fine; I've got metrics flowing into riemann correctly now.