XiaoSheng Song created ZOOKEEPER-4910:
-----------------------------------------

             Summary: ava.lang.NoClassDefFoundError: 
com/codahale/metrics/Reservoir
                 Key: ZOOKEEPER-4910
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4910
             Project: ZooKeeper
          Issue Type: Bug
    Affects Versions: 3.9.0, 3.8.0, 3.7.0, 3.6.0
            Reporter: XiaoSheng Song
             Fix For: 3.10.0


when no dep dropwizard will appear java.lang.NoClassDefFoundError: 
com/codahale/metrics/Reservoir
{code:java}
Exception in thread "ZooKeeper Server Starter" java.lang.NoClassDefFoundError: 
com/codahale/metrics/Reservoir
        at 
org.apache.zookeeper.metrics.impl.DefaultMetricsProvider$DefaultMetricsContext.lambda$getSummary$2(DefaultMetricsProvider.java:126)
        at 
java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1713)
        at 
org.apache.zookeeper.metrics.impl.DefaultMetricsProvider$DefaultMetricsContext.getSummary(DefaultMetricsProvider.java:122)
        at 
org.apache.zookeeper.server.ServerMetrics.<init>(ServerMetrics.java:74)
        at 
org.apache.zookeeper.server.ServerMetrics.<clinit>(ServerMetrics.java:44)
        at 
org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:133)
        at 
org.apache.dubbo.springboot.demo.provider.EmbeddedZooKeeper$ServerRunnable.run(EmbeddedZooKeeper.java:249)
        at java.base/java.lang.Thread.run(Thread.java:1575)
Caused by: java.lang.ClassNotFoundException: com.codahale.metrics.Reservoir
        at 
java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
        at 
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:528)
        ... 8  {code}



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