It is a NoClassDefFoundError so the clinit of Metrics class is failing. Please look for surrounding stack traces, there must be a root cause for why the class initialization failed.
On Wed, Sep 2, 2015 at 1:05 PM, Vadim Keylis <vkeylis2...@gmail.com> wrote: > I suddenly started getting this error using the code that was perfectly > working a day before. The library containing yammer metrics exists and part > of mvn build. Please help how to resolve the issue or disable > yammer.metrics. > > Thanks in advance > > Exception in thread "Thread-3" java.lang.NoClassDefFoundError: Could not > initialize class com.yammer.metrics.Metrics > at > kafka.metrics.KafkaMetricsGroup$class.newTimer(KafkaMetricsGroup.scala:52) > at > > kafka.consumer.FetchRequestAndResponseMetrics.newTimer(FetchRequestAndResponseStats.scala:25) > at > > kafka.consumer.FetchRequestAndResponseMetrics.<init>(FetchRequestAndResponseStats.scala:26) > at > > kafka.consumer.FetchRequestAndResponseStats.<init>(FetchRequestAndResponseStats.scala:37) > at > > kafka.consumer.FetchRequestAndResponseStatsRegistry$$anonfun$2.apply(FetchRequestAndResponseStats.scala:50) > at > > kafka.consumer.FetchRequestAndResponseStatsRegistry$$anonfun$2.apply(FetchRequestAndResponseStats.scala:50) > at kafka.utils.Pool.getAndMaybePut(Pool.scala:61) > at > > kafka.consumer.FetchRequestAndResponseStatsRegistry$.getFetchRequestAndResponseStats(FetchRequestAndResponseStats.scala:54) > at kafka.consumer.SimpleConsumer.<init>(SimpleConsumer.scala:39) > at kafka.javaapi.consumer.SimpleConsumer.<init>(SimpleConsumer.scala:34) > at > > com.tagged.etlhub.client.kafka.connector.driver.LeaderDiscovery.connectToLeader(LeaderDiscovery.java:90) > at > > com.tagged.etlhub.client.kafka.connector.driver.LeaderDiscovery.findLeader(LeaderDiscovery.java:50) > at > > com.tagged.etlhub.client.kafka.connector.driver.Connector.connect(Connector.java:208) > at > > com.tagged.etlhub.client.kafka.connector.driver.Connector.createConnector(Connector.java:65) > at > > com.tagged.etlhub.client.kafka.connector.driver.ConnectorFactory.getConnector(ConnectorFactory.java:11) > at > > com.tagged.etlhub.client.kafka.message.TopicMessages.getConnector(TopicMessages.java:156) > at > > com.tagged.etlhub.client.kafka.message.TopicMessages.connect(TopicMessages.java:45) > at > > com.tagged.etlhub.client.StreamThreadPool.startStream(StreamThreadPool.java:109) > at > > com.tagged.etlhub.client.StreamThreadPool.access$0(StreamThreadPool.java:93) > at > com.tagged.etlhub.client.StreamThreadPool$1.run(StreamThreadPool.java:73) > at java.lang.Thread.run(Unknown Source) >
