我在通过namenode运行hadoop平衡器时遇到了这个错误。关于破解这个的任何提示。进程还阻塞当前用户，并在发出任何其他命令时出现内存不足错误。

14/05/09 11:30:05 WARN hdfs.LeaseRenewer: Failed to renew lease for [DFSClient_NONMAPREDUCE_-77290934_1] for 936 seconds.  Will retry shortly ...
 java.io.IOException: Failed on local exception: java.io.IOException: Couldn't set up IO streams; Host Details : local host is: "hadoop01.xx.xx.xx.xx.com/30.0.1.176"; destination host is: "hadoop01.xx.xx.xx.xx.com":8022; 
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:763)
        at org.apache.hadoop.ipc.Client.call(Client.java:1242)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:202)
        at $Proxy10.renewLease(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:164)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:83)
        at $Proxy10.renewLease(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.renewLease(ClientNamenodeProtocolTranslatorPB.java:458)
        at org.apache.hadoop.hdfs.DFSClient.renewLease(DFSClient.java:649)
        at org.apache.hadoop.hdfs.LeaseRenewer.renew(LeaseRenewer.java:417)
        at org.apache.hadoop.hdfs.LeaseRenewer.run(LeaseRenewer.java:442)
        at org.apache.hadoop.hdfs.LeaseRenewer.access$700(LeaseRenewer.java:71)
        at org.apache.hadoop.hdfs.LeaseRenewer$1.run(LeaseRenewer.java:298)
        at java.lang.Thread.run(Thread.java:662)
    Caused by: java.io.IOException: Couldn't set up IO streams
        at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:671)
        at org.apache.hadoop.ipc.Client$Connection.access$2100(Client.java:252)
        at org.apache.hadoop.ipc.Client.getConnection(Client.java:1291)
        at org.apache.hadoop.ipc.Client.call(Client.java:1209)
        ... 15 more
    Caused by: java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start0(Native Method)
        at java.lang.Thread.start(Thread.java:640)
        at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:664)
        ... 18 more