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Posted to solr-user@lucene.apache.org by sudershan madhavan <su...@gmail.com> on 2017/11/07 16:44:57 UTC
Issues with Graphite reporter config
Hi,
I am running Solrcloud version: 6.6.1
I have been trying to use graphite to report solr metrics and seem to get
the below error while doing so in the solr logs:
> java.lang.NullPointerException
> at
> com.codahale.metrics.graphite.PickledGraphite.pickleMetrics(PickledGraphite.java:313)
> at
> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(PickledGraphite.java:255)
> at
> com.codahale.metrics.graphite.PickledGraphite.send(PickledGraphite.java:213)
> at
> com.codahale.metrics.graphite.GraphiteReporter.reportGauge(GraphiteReporter.java:345)
> at
> com.codahale.metrics.graphite.GraphiteReporter.report(GraphiteReporter.java:243)
> at
> com.codahale.metrics.ScheduledReporter.report(ScheduledReporter.java:251)
> at
> com.codahale.metrics.ScheduledReporter$1.run(ScheduledReporter.java:174)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> 2017-11-07 15:28:47.543 WARN (metrics-graphite-reporter-3-thread-1) [ ]
> c.c.m.g.GraphiteReporter Unable to report to Graphite
> java.net.SocketException: Socket closed
> at
> java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:118)
> at java.net.SocketOutputStream.write(SocketOutputStream.java:143)
> at
> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(PickledGraphite.java:261)
> at
> com.codahale.metrics.graphite.PickledGraphite.send(PickledGraphite.java:213)
> at
> com.codahale.metrics.graphite.GraphiteReporter.sendIfEnabled(GraphiteReporter.java:328)
> at
> com.codahale.metrics.graphite.GraphiteReporter.reportTimer(GraphiteReporter.java:288)
> at
> com.codahale.metrics.graphite.GraphiteReporter.report(GraphiteReporter.java:259)
> at
> com.codahale.metrics.ScheduledReporter.report(ScheduledReporter.java:251)
> at
> com.codahale.metrics.ScheduledReporter$1.run(ScheduledReporter.java:174)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> 2017-11-07 15:28:47.543 ERROR (metrics-graphite-reporter-1-thread-1) [ ]
> c.c.m.ScheduledReporter Exception thrown from GraphiteReporter#report.
> Exception was suppressed.
> java.lang.NullPointerException
> at java.util.LinkedList$ListItr.next(LinkedList.java:893)
> at
> com.codahale.metrics.graphite.PickledGraphite.pickleMetrics(PickledGraphite.java:305)
> at
> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(PickledGraphite.java:255)
> at
> com.codahale.metrics.graphite.PickledGraphite.send(PickledGraphite.java:213)
> at
> com.codahale.metrics.graphite.GraphiteReporter.sendIfEnabled(GraphiteReporter.java:328)
> at
> com.codahale.metrics.graphite.GraphiteReporter.reportMetered(GraphiteReporter.java:304)
> at
> com.codahale.metrics.graphite.GraphiteReporter.report(GraphiteReporter.java:255)
> at
> com.codahale.metrics.ScheduledReporter.report(ScheduledReporter.java:251)
> at
> com.codahale.metrics.ScheduledReporter$1.run(ScheduledReporter.java:174)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> (END)
Kindly let me know if this needs to be reported as a bug.
Re: Issues with Graphite reporter config
Posted by sudershan madhavan <su...@gmail.com>.
Can someone confirm if this needs to be reported as a bug? As the exception
in the patch seems to be different than that of the the SOLR-11413? Also
the issue is not sporadic but occurs every time the Graphite Reporter is
invoked for multiple metrics.
Regards
Sudershan Madahavan
On Tue, Nov 7, 2017 at 7:10 PM, sudershan madhavan <
sudershan.madhavan@gmail.com> wrote:
> Thank you Cassandra. Does seem like a thread unsafe operation issue. But
> what confuses me is the error occurs every time and only occurs when I have
> multiple metrics group configured. Also the exception is null pointer on
> the linked list instead of already connected exception
>
> Regards
> Sudershan Madhavan
>
> On 7 Nov 2017 6:18 pm, "Cassandra Targett" <ca...@gmail.com> wrote:
>
>> I believe this is https://issues.apache.org/jira/browse/SOLR-11413,
>> which has a fix already slated for Solr 7.2.
>>
>> On Tue, Nov 7, 2017 at 10:44 AM, sudershan madhavan
>> <su...@gmail.com> wrote:
>> > Hi,
>> > I am running Solrcloud version: 6.6.1
>> > I have been trying to use graphite to report solr metrics and seem to
>> get
>> > the below error while doing so in the solr logs:
>> >>
>> >> java.lang.NullPointerException
>> >> at
>> >> com.codahale.metrics.graphite.PickledGraphite.pickleMetrics(
>> PickledGraphite.java:313)
>> >> at
>> >> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(P
>> ickledGraphite.java:255)
>> >> at
>> >> com.codahale.metrics.graphite.PickledGraphite.send(PickledGr
>> aphite.java:213)
>> >> at
>> >> com.codahale.metrics.graphite.GraphiteReporter.reportGauge(G
>> raphiteReporter.java:345)
>> >> at
>> >> com.codahale.metrics.graphite.GraphiteReporter.report(Graphi
>> teReporter.java:243)
>> >> at
>> >> com.codahale.metrics.ScheduledReporter.report(ScheduledRepor
>> ter.java:251)
>> >> at
>> >> com.codahale.metrics.ScheduledReporter$1.run(ScheduledReport
>> er.java:174)
>> >> at
>> >> java.util.concurrent.Executors$RunnableAdapter.call(
>> Executors.java:511)
>> >> at
>> >> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
>> >> at
>> >> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFu
>> tureTask.access$301(ScheduledThreadPoolExecutor.java:180)
>> >> at
>> >> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFu
>> tureTask.run(ScheduledThreadPoolExecutor.java:294)
>> >> at
>> >> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPool
>> Executor.java:1142)
>> >> at
>> >> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoo
>> lExecutor.java:617)
>> >> at java.lang.Thread.run(Thread.java:745)
>> >> 2017-11-07 15:28:47.543 WARN (metrics-graphite-reporter-3-thread-1)
>> [ ]
>> >> c.c.m.g.GraphiteReporter Unable to report to Graphite
>> >> java.net.SocketException: Socket closed
>> >> at
>> >> java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:118)
>> >> at java.net.SocketOutputStream.wr
>> ite(SocketOutputStream.java:143)
>> >> at
>> >> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(P
>> ickledGraphite.java:261)
>> >> at
>> >> com.codahale.metrics.graphite.PickledGraphite.send(PickledGr
>> aphite.java:213)
>> >> at
>> >> com.codahale.metrics.graphite.GraphiteReporter.sendIfEnabled
>> (GraphiteReporter.java:328)
>> >> at
>> >> com.codahale.metrics.graphite.GraphiteReporter.reportTimer(G
>> raphiteReporter.java:288)
>> >> at
>> >> com.codahale.metrics.graphite.GraphiteReporter.report(Graphi
>> teReporter.java:259)
>> >> at
>> >> com.codahale.metrics.ScheduledReporter.report(ScheduledRepor
>> ter.java:251)
>> >> at
>> >> com.codahale.metrics.ScheduledReporter$1.run(ScheduledReport
>> er.java:174)
>> >> at
>> >> java.util.concurrent.Executors$RunnableAdapter.call(
>> Executors.java:511)
>> >> at
>> >> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
>> >> at
>> >> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFu
>> tureTask.access$301(ScheduledThreadPoolExecutor.java:180)
>> >> at
>> >> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFu
>> tureTask.run(ScheduledThreadPoolExecutor.java:294)
>> >> at
>> >> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPool
>> Executor.java:1142)
>> >> at
>> >> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoo
>> lExecutor.java:617)
>> >> at java.lang.Thread.run(Thread.java:745)
>> >> 2017-11-07 15:28:47.543 ERROR (metrics-graphite-reporter-1-thread-1)
>> [ ]
>> >> c.c.m.ScheduledReporter Exception thrown from GraphiteReporter#report.
>> >> Exception was suppressed.
>> >> java.lang.NullPointerException
>> >> at java.util.LinkedList$ListItr.next(LinkedList.java:893)
>> >> at
>> >> com.codahale.metrics.graphite.PickledGraphite.pickleMetrics(
>> PickledGraphite.java:305)
>> >> at
>> >> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(P
>> ickledGraphite.java:255)
>> >> at
>> >> com.codahale.metrics.graphite.PickledGraphite.send(PickledGr
>> aphite.java:213)
>> >> at
>> >> com.codahale.metrics.graphite.GraphiteReporter.sendIfEnabled
>> (GraphiteReporter.java:328)
>> >> at
>> >> com.codahale.metrics.graphite.GraphiteReporter.reportMetered
>> (GraphiteReporter.java:304)
>> >> at
>> >> com.codahale.metrics.graphite.GraphiteReporter.report(Graphi
>> teReporter.java:255)
>> >> at
>> >> com.codahale.metrics.ScheduledReporter.report(ScheduledRepor
>> ter.java:251)
>> >> at
>> >> com.codahale.metrics.ScheduledReporter$1.run(ScheduledReport
>> er.java:174)
>> >> at
>> >> java.util.concurrent.Executors$RunnableAdapter.call(
>> Executors.java:511)
>> >> at
>> >> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
>> >> at
>> >> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFu
>> tureTask.access$301(ScheduledThreadPoolExecutor.java:180)
>> >> at
>> >> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFu
>> tureTask.run(ScheduledThreadPoolExecutor.java:294)
>> >> at
>> >> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPool
>> Executor.java:1142)
>> >> at
>> >> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoo
>> lExecutor.java:617)
>> >> at java.lang.Thread.run(Thread.java:745)
>> >> (END)
>> >
>> >
>> > Kindly let me know if this needs to be reported as a bug.
>>
>
Re: Issues with Graphite reporter config
Posted by sudershan madhavan <su...@gmail.com>.
Thank you Cassandra. Does seem like a thread unsafe operation issue. But
what confuses me is the error occurs every time and only occurs when I have
multiple metrics group configured. Also the exception is null pointer on
the linked list instead of already connected exception
Regards
Sudershan Madhavan
On 7 Nov 2017 6:18 pm, "Cassandra Targett" <ca...@gmail.com> wrote:
> I believe this is https://issues.apache.org/jira/browse/SOLR-11413,
> which has a fix already slated for Solr 7.2.
>
> On Tue, Nov 7, 2017 at 10:44 AM, sudershan madhavan
> <su...@gmail.com> wrote:
> > Hi,
> > I am running Solrcloud version: 6.6.1
> > I have been trying to use graphite to report solr metrics and seem to get
> > the below error while doing so in the solr logs:
> >>
> >> java.lang.NullPointerException
> >> at
> >> com.codahale.metrics.graphite.PickledGraphite.pickleMetrics(
> PickledGraphite.java:313)
> >> at
> >> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(
> PickledGraphite.java:255)
> >> at
> >> com.codahale.metrics.graphite.PickledGraphite.send(
> PickledGraphite.java:213)
> >> at
> >> com.codahale.metrics.graphite.GraphiteReporter.reportGauge(
> GraphiteReporter.java:345)
> >> at
> >> com.codahale.metrics.graphite.GraphiteReporter.report(
> GraphiteReporter.java:243)
> >> at
> >> com.codahale.metrics.ScheduledReporter.report(
> ScheduledReporter.java:251)
> >> at
> >> com.codahale.metrics.ScheduledReporter$1.run(
> ScheduledReporter.java:174)
> >> at
> >> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> >> at
> >> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> >> at
> >> java.util.concurrent.ScheduledThreadPoolExecutor$
> ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> >> at
> >> java.util.concurrent.ScheduledThreadPoolExecutor$
> ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> >> at
> >> java.util.concurrent.ThreadPoolExecutor.runWorker(
> ThreadPoolExecutor.java:1142)
> >> at
> >> java.util.concurrent.ThreadPoolExecutor$Worker.run(
> ThreadPoolExecutor.java:617)
> >> at java.lang.Thread.run(Thread.java:745)
> >> 2017-11-07 15:28:47.543 WARN (metrics-graphite-reporter-3-thread-1)
> [ ]
> >> c.c.m.g.GraphiteReporter Unable to report to Graphite
> >> java.net.SocketException: Socket closed
> >> at
> >> java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:118)
> >> at java.net.SocketOutputStream.write(SocketOutputStream.java:
> 143)
> >> at
> >> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(
> PickledGraphite.java:261)
> >> at
> >> com.codahale.metrics.graphite.PickledGraphite.send(
> PickledGraphite.java:213)
> >> at
> >> com.codahale.metrics.graphite.GraphiteReporter.sendIfEnabled(
> GraphiteReporter.java:328)
> >> at
> >> com.codahale.metrics.graphite.GraphiteReporter.reportTimer(
> GraphiteReporter.java:288)
> >> at
> >> com.codahale.metrics.graphite.GraphiteReporter.report(
> GraphiteReporter.java:259)
> >> at
> >> com.codahale.metrics.ScheduledReporter.report(
> ScheduledReporter.java:251)
> >> at
> >> com.codahale.metrics.ScheduledReporter$1.run(
> ScheduledReporter.java:174)
> >> at
> >> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> >> at
> >> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> >> at
> >> java.util.concurrent.ScheduledThreadPoolExecutor$
> ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> >> at
> >> java.util.concurrent.ScheduledThreadPoolExecutor$
> ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> >> at
> >> java.util.concurrent.ThreadPoolExecutor.runWorker(
> ThreadPoolExecutor.java:1142)
> >> at
> >> java.util.concurrent.ThreadPoolExecutor$Worker.run(
> ThreadPoolExecutor.java:617)
> >> at java.lang.Thread.run(Thread.java:745)
> >> 2017-11-07 15:28:47.543 ERROR (metrics-graphite-reporter-1-thread-1)
> [ ]
> >> c.c.m.ScheduledReporter Exception thrown from GraphiteReporter#report.
> >> Exception was suppressed.
> >> java.lang.NullPointerException
> >> at java.util.LinkedList$ListItr.next(LinkedList.java:893)
> >> at
> >> com.codahale.metrics.graphite.PickledGraphite.pickleMetrics(
> PickledGraphite.java:305)
> >> at
> >> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(
> PickledGraphite.java:255)
> >> at
> >> com.codahale.metrics.graphite.PickledGraphite.send(
> PickledGraphite.java:213)
> >> at
> >> com.codahale.metrics.graphite.GraphiteReporter.sendIfEnabled(
> GraphiteReporter.java:328)
> >> at
> >> com.codahale.metrics.graphite.GraphiteReporter.reportMetered(
> GraphiteReporter.java:304)
> >> at
> >> com.codahale.metrics.graphite.GraphiteReporter.report(
> GraphiteReporter.java:255)
> >> at
> >> com.codahale.metrics.ScheduledReporter.report(
> ScheduledReporter.java:251)
> >> at
> >> com.codahale.metrics.ScheduledReporter$1.run(
> ScheduledReporter.java:174)
> >> at
> >> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> >> at
> >> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> >> at
> >> java.util.concurrent.ScheduledThreadPoolExecutor$
> ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> >> at
> >> java.util.concurrent.ScheduledThreadPoolExecutor$
> ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> >> at
> >> java.util.concurrent.ThreadPoolExecutor.runWorker(
> ThreadPoolExecutor.java:1142)
> >> at
> >> java.util.concurrent.ThreadPoolExecutor$Worker.run(
> ThreadPoolExecutor.java:617)
> >> at java.lang.Thread.run(Thread.java:745)
> >> (END)
> >
> >
> > Kindly let me know if this needs to be reported as a bug.
>
Re: Issues with Graphite reporter config
Posted by Cassandra Targett <ca...@gmail.com>.
I believe this is https://issues.apache.org/jira/browse/SOLR-11413,
which has a fix already slated for Solr 7.2.
On Tue, Nov 7, 2017 at 10:44 AM, sudershan madhavan
<su...@gmail.com> wrote:
> Hi,
> I am running Solrcloud version: 6.6.1
> I have been trying to use graphite to report solr metrics and seem to get
> the below error while doing so in the solr logs:
>>
>> java.lang.NullPointerException
>> at
>> com.codahale.metrics.graphite.PickledGraphite.pickleMetrics(PickledGraphite.java:313)
>> at
>> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(PickledGraphite.java:255)
>> at
>> com.codahale.metrics.graphite.PickledGraphite.send(PickledGraphite.java:213)
>> at
>> com.codahale.metrics.graphite.GraphiteReporter.reportGauge(GraphiteReporter.java:345)
>> at
>> com.codahale.metrics.graphite.GraphiteReporter.report(GraphiteReporter.java:243)
>> at
>> com.codahale.metrics.ScheduledReporter.report(ScheduledReporter.java:251)
>> at
>> com.codahale.metrics.ScheduledReporter$1.run(ScheduledReporter.java:174)
>> at
>> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>> at
>> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
>> at
>> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
>> at
>> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
>> at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>> at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>> at java.lang.Thread.run(Thread.java:745)
>> 2017-11-07 15:28:47.543 WARN (metrics-graphite-reporter-3-thread-1) [ ]
>> c.c.m.g.GraphiteReporter Unable to report to Graphite
>> java.net.SocketException: Socket closed
>> at
>> java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:118)
>> at java.net.SocketOutputStream.write(SocketOutputStream.java:143)
>> at
>> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(PickledGraphite.java:261)
>> at
>> com.codahale.metrics.graphite.PickledGraphite.send(PickledGraphite.java:213)
>> at
>> com.codahale.metrics.graphite.GraphiteReporter.sendIfEnabled(GraphiteReporter.java:328)
>> at
>> com.codahale.metrics.graphite.GraphiteReporter.reportTimer(GraphiteReporter.java:288)
>> at
>> com.codahale.metrics.graphite.GraphiteReporter.report(GraphiteReporter.java:259)
>> at
>> com.codahale.metrics.ScheduledReporter.report(ScheduledReporter.java:251)
>> at
>> com.codahale.metrics.ScheduledReporter$1.run(ScheduledReporter.java:174)
>> at
>> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>> at
>> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
>> at
>> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
>> at
>> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
>> at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>> at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>> at java.lang.Thread.run(Thread.java:745)
>> 2017-11-07 15:28:47.543 ERROR (metrics-graphite-reporter-1-thread-1) [ ]
>> c.c.m.ScheduledReporter Exception thrown from GraphiteReporter#report.
>> Exception was suppressed.
>> java.lang.NullPointerException
>> at java.util.LinkedList$ListItr.next(LinkedList.java:893)
>> at
>> com.codahale.metrics.graphite.PickledGraphite.pickleMetrics(PickledGraphite.java:305)
>> at
>> com.codahale.metrics.graphite.PickledGraphite.writeMetrics(PickledGraphite.java:255)
>> at
>> com.codahale.metrics.graphite.PickledGraphite.send(PickledGraphite.java:213)
>> at
>> com.codahale.metrics.graphite.GraphiteReporter.sendIfEnabled(GraphiteReporter.java:328)
>> at
>> com.codahale.metrics.graphite.GraphiteReporter.reportMetered(GraphiteReporter.java:304)
>> at
>> com.codahale.metrics.graphite.GraphiteReporter.report(GraphiteReporter.java:255)
>> at
>> com.codahale.metrics.ScheduledReporter.report(ScheduledReporter.java:251)
>> at
>> com.codahale.metrics.ScheduledReporter$1.run(ScheduledReporter.java:174)
>> at
>> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>> at
>> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
>> at
>> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
>> at
>> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
>> at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>> at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>> at java.lang.Thread.run(Thread.java:745)
>> (END)
>
>
> Kindly let me know if this needs to be reported as a bug.