2016-09-17 20:55:37,605 - WARN  [GarbageCollectorThread-1-1:GarbageCollectorThread@392] - Exception in gc
org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /ledgers/LAYOUT
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
    at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783)
    at org.apache.bookkeeper.meta.LedgerLayout.store(LedgerLayout.java:146)
    at org.apache.bookkeeper.meta.LedgerManagerFactory.createNewLMFactory(LedgerManagerFactory.java:214)
    at org.apache.bookkeeper.meta.LedgerManagerFactory.newLedgerManagerFactory(LedgerManagerFactory.java:126)
    at org.apache.bookkeeper.bookie.GarbageCollectorThread$LedgerManagerProviderImpl.getLedgerManager(GarbageCollectorThread.java:635)
    at org.apache.bookkeeper.bookie.GarbageCollectorThread.safeRun(GarbageCollectorThread.java:346)
    at org.apache.bookkeeper.util.SafeRunnable.run(SafeRunnable.java:31)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
    at java.lang.Thread.run(Thread.java:745)

[zk: localhost:2181(CONNECTED) 0] ls /
[namespace, admin, loadbalance, zookeeper, ledgers, managed-ledgers]
[zk: localhost:2181(CONNECTED) 1] ls /ledgers
[available, cookies, LAYOUT]