java.lang.Exception: ZKW CONSTRUCTOR STACK TRACE FOR DEBUGGING

Stack Overflow | slushi | 2 years ago
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    hbase connection refused

    Stack Overflow | 5 years ago | khan
    org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is able to connect to ZooKeeper but the connection closes immediately. This could be a sign that the server has too many connections (30 is the default). Consider inspecting your ZK server logs for that error and then make sure you are reusing HBaseConfiguration as often as you can. See HTable's javadoc for more information.

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    Root Cause Analysis

    1. java.lang.Exception

      ZKW CONSTRUCTOR STACK TRACE FOR DEBUGGING

      at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>()
    2. HBase - Client
      HBaseAdmin.<init>
      1. org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:143)
      2. org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:127)
      3. org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getZooKeeperWatcher(HConnectionManager.java:1506)
      4. org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.ensureZookeeperTrackers(HConnectionManager.java:714)
      5. org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getMaster(HConnectionManager.java:787)
      6. org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:175)
      6 frames
    3. com.feedly.normandy
      HBaseUnitTest.beforeClass
      1. com.feedly.normandy.persistence.hbase.PersistenceManager.init(PersistenceManager.java:244)
      2. com.feedly.normandy.HBaseUnitTest.createPersistenceManager(HBaseUnitTest.java:152)
      3. com.feedly.normandy.HBaseUnitTest.beforeClass(HBaseUnitTest.java:159)
      3 frames
    4. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      4. java.lang.reflect.Method.invoke(Method.java:601)
      4 frames
    5. JUnit
      ParentRunner.run
      1. org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
      2. org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      3. org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
      4. org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
      5. org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
      6. org.junit.runners.ParentRunner.run(ParentRunner.java:309)
      6 frames
    6. JUnit4 Runner
      JUnit4TestReference.run
      1. org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
      1 frame
    7. JUnit3 Runner
      RemoteTestRunner.main
      1. org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      2. org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
      3. org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
      4. org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
      5. org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
      5 frames