java.lang.RuntimeException: Trying to unlisten to a channel that has no listeners in it.

Apache's JIRA Issue Tracker | Mark S | 2 years ago
tip
Your exception is missing from the Samebug knowledge base.
Here are the best solutions we found on the Internet.
Click on the to mark the helpful solution and get rewards for you help.
  1. 0

    [SAMZA-752] "Hello Samza" Scala issues - ASF JIRA

    apache.org | 1 year ago
    java.lang.RuntimeException: Trying to unlisten to a channel that has no listeners in it.
  2. 0

    I am currently trying to run the Hello Samza example (http://samza.apache.org/startup/hello-samza/0.9/) and unfortunately when I try to run a Samza job I get the following exception: *Command* {code} deploy/samza/bin/run-job.sh --config-factory=org.apache.samza.config.factories.PropertiesConfigFactory --config-path=file://$PWD/deploy/samza/config/wikipedia-feed.properties {code} *Exception* {code} ... Error: A JNI error has occurred, please check your installation and try again Exception in thread "main" java.lang.NoClassDefFoundError: scala/Function2 at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) at java.lang.Class.privateGetMethodRecursive(Class.java:3048) at java.lang.Class.getMethod0(Class.java:3018) at java.lang.Class.getMethod(Class.java:1784) at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526) Caused by: java.lang.ClassNotFoundException: scala.Function2 at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 7 more {code} If I edit vim deploy/samza/bin/run-class.sh and manually add the scala-library.jar to the CLASSPATH value, this error disappears, though the Hadoop Application will fail with a similarish exception (http://localhost:8088/). {code} Error: A JNI error has occurred, please check your installation and try again Exception in thread "main" java.lang.NoClassDefFoundError: scala/collection/immutable/List at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) at java.lang.Class.privateGetMethodRecursive(Class.java:3048) at java.lang.Class.getMethod0(Class.java:3018) at java.lang.Class.getMethod(Class.java:1784) at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526) Caused by: java.lang.ClassNotFoundException: scala.collection.immutable.List 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) ... 7 more {code} The following links might be related: * https://samza.apache.org/learn/tutorials/0.9/run-in-multi-node-yarn.html * https://issues.apache.org/jira/browse/SAMZA-456

    Apache's JIRA Issue Tracker | 2 years ago | Mark S
    java.lang.RuntimeException: Trying to unlisten to a channel that has no listeners in it.
  3. 0

    I am currently trying to run the Hello Samza example (http://samza.apache.org/startup/hello-samza/0.9/) and unfortunately when I try to run a Samza job I get the following exception: *Command* {code} deploy/samza/bin/run-job.sh --config-factory=org.apache.samza.config.factories.PropertiesConfigFactory --config-path=file://$PWD/deploy/samza/config/wikipedia-feed.properties {code} *Exception* {code} ... Error: A JNI error has occurred, please check your installation and try again Exception in thread "main" java.lang.NoClassDefFoundError: scala/Function2 at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) at java.lang.Class.privateGetMethodRecursive(Class.java:3048) at java.lang.Class.getMethod0(Class.java:3018) at java.lang.Class.getMethod(Class.java:1784) at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526) Caused by: java.lang.ClassNotFoundException: scala.Function2 at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 7 more {code} If I edit vim deploy/samza/bin/run-class.sh and manually add the scala-library.jar to the CLASSPATH value, this error disappears, though the Hadoop Application will fail with a similarish exception (http://localhost:8088/). {code} Error: A JNI error has occurred, please check your installation and try again Exception in thread "main" java.lang.NoClassDefFoundError: scala/collection/immutable/List at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) at java.lang.Class.privateGetMethodRecursive(Class.java:3048) at java.lang.Class.getMethod0(Class.java:3018) at java.lang.Class.getMethod(Class.java:1784) at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526) Caused by: java.lang.ClassNotFoundException: scala.collection.immutable.List 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) ... 7 more {code} The following links might be related: * https://samza.apache.org/learn/tutorials/0.9/run-in-multi-node-yarn.html * https://issues.apache.org/jira/browse/SAMZA-456

    Apache's JIRA Issue Tracker | 2 years ago | Mark S
    java.lang.RuntimeException: Trying to unlisten to a channel that has no listeners in it.
  4. Speed up your debug routine!

    Automated exception search integrated into your IDE

    Root Cause Analysis

    1. java.lang.RuntimeException

      Trying to unlisten to a channel that has no listeners in it.

      at samza.examples.wikipedia.system.WikipediaFeed.unlisten()
    2. samza.examples.wikipedia
      WikipediaConsumer.stop
      1. samza.examples.wikipedia.system.WikipediaFeed.unlisten(WikipediaFeed.java:98)
      2. samza.examples.wikipedia.system.WikipediaConsumer.stop(WikipediaConsumer.java:72)
      2 frames
    3. org.apache.samza
      SystemConsumers$$anonfun$stop$2.apply
      1. org.apache.samza.system.SystemConsumers$$anonfun$stop$2.apply(SystemConsumers.scala:169)
      2. org.apache.samza.system.SystemConsumers$$anonfun$stop$2.apply(SystemConsumers.scala:169)
      2 frames
    4. Scala
      MapLike$DefaultValuesIterable.foreach
      1. scala.collection.Iterator$class.foreach(Iterator.scala:727)
      2. scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
      3. scala.collection.MapLike$DefaultValuesIterable.foreach(MapLike.scala:206)
      3 frames
    5. org.apache.samza
      SamzaContainer.main
      1. org.apache.samza.system.SystemConsumers.stop(SystemConsumers.scala:169)
      2. org.apache.samza.container.SamzaContainer.shutdownConsumers(SamzaContainer.scala:638)
      3. org.apache.samza.container.SamzaContainer.run(SamzaContainer.scala:563)
      4. org.apache.samza.container.SamzaContainer$.safeMain(SamzaContainer.scala:93)
      5. org.apache.samza.container.SamzaContainer$.main(SamzaContainer.scala:67)
      6. org.apache.samza.container.SamzaContainer.main(SamzaContainer.scala)
      6 frames