sun.nio.ch.KQueueSelectorImpl

DataStax JIRA | Matthew Conway | 4 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

    This may just be an edge case for me, but noticed that when I use java-driver in a jruby rails application, the rails console would just hang when I tried to exit. I traced it down to the fact that java-driver (or one of its dependencies) creates a bunch of non-daemon threads. If its possible, it would be great if you ensured all threads were daemon threads. I think the 2 culprits (from a kill -3) are: {noformat} "Hashed wheel timer #1" prio=5 tid=7fb4e9e4e800 nid=0x119c18000 waiting on condition [119c17000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at org.jboss.netty.util.HashedWheelTimer$Worker.waitForNextTick(HashedWheelTimer.java:467) at org.jboss.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:376) at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108) at java.lang.Thread.run(Thread.java:680) "New I/O boss #17" prio=5 tid=7fb4ea080800 nid=0x119808000 runnable [119807000] java.lang.Thread.State: RUNNABLE at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method) at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:136) at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:69) at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69) - locked <7e380c210> (a sun.nio.ch.Util$2) - locked <7e380c228> (a java.util.Collections$UnmodifiableSet) - locked <7e380ff58> (a sun.nio.ch.KQueueSelectorImpl) at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80) at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:64) at org.jboss.netty.channel.socket.nio.AbstractNioSelector.select(AbstractNioSelector.java:409) at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:206) at org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:41) at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108) at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:680) {noformat}

    DataStax JIRA | 4 years ago | Matthew Conway
    sun.nio.ch.KQueueSelectorImpl

    Root Cause Analysis

    1. sun.nio.ch.KQueueSelectorImpl

      No message provided

      at sun.nio.ch.SelectorImpl.select()
    2. Java RT
      SelectorImpl.select
      1. sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
      1 frame
    3. Netty
      DeadLockProofWorker$1.run
      1. org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:64)
      2. org.jboss.netty.channel.socket.nio.AbstractNioSelector.select(AbstractNioSelector.java:409)
      3. org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:206)
      4. org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:41)
      5. org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
      6. org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
      6 frames
    4. Java RT
      Thread.run
      1. java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
      2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
      3. java.lang.Thread.run(Thread.java:680)
      3 frames