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Date: Mon, 15 Aug 2016 12:41:22 +0000 (UTC)
From: "RWenden (JIRA)" <jira@apache.org>
To: dev@flink.apache.org
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Subject: [jira] [Created] (FLINK-4396) MetricRegistry class not found at
 startup of jobmanager
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archived-at: Mon, 15 Aug 2016 12:41:26 -0000

RWenden created FLINK-4396:
------------------------------

             Summary: MetricRegistry class not found at startup of jobmanager
                 Key: FLINK-4396
                 URL: https://issues.apache.org/jira/browse/FLINK-4396
             Project: Flink
          Issue Type: Bug
          Components: Build System
    Affects Versions: 1.1.1
         Environment: Windows and Unix

            Reporter: RWenden
             Fix For: 1.1.2


For Flink 1.1.1 we configured Graphite metrics settings on the flink-conf.yaml (for job manager (and taskmanager)).

We see the following error in the log:

2016-08-15 14:20:34,167 ERROR org.apache.flink.runtime.metrics.MetricRegistry               - Could not instantiate metrics reportermy_reporter. Metrics might not be exposed/reported.
java.lang.ClassNotFoundException: org.apache.flink.metrics.graphite.GraphiteReporter
                at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
                at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
                at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
                at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
                at java.lang.Class.forName0(Native Method)
                at java.lang.Class.forName(Class.java:264)
                at org.apache.flink.runtime.metrics.MetricRegistry.<init>(MetricRegistry.java:119)

We found out that this class is not packaged inside flink-dist_2.11-1.1.1.jar.
Long story short: we had to install/provide the following jars into the lib folder to make Graphite metrics to work:
flink-metrics-graphite-1.1.1.jar
flink-metrics-dropwizard-1.1.1.jar
metrics-graphite-3.1.0.jar (from dropwizard)

We think these libraries (and the ones for Ganglia,StatsD,...) should be included in flink-dist_2.11-1.1.1.jar, for these are needed at manager startup time.



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