JAVA高级面试进阶训练营视频教程

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在学习java nio的过程中发现某些情况下使用该方法会导致程序阻塞，（情况：服务器，Linux；客户端，WIN10）

java.net.InetAddress.getHostName()

阻塞情况如下：

"TCP:Selector@server:/192.168.0.117:18300" prio=6 tid=0x0000000007eff800 nid=0x3674 runnable [0x00000000093ae000]
   java.lang.Thread.State: RUNNABLE
    at java.net.Inet6AddressImpl.getHostByAddr(Native Method)
    at java.net.InetAddress$1.getHostByAddr(InetAddress.java:880)
    at java.net.InetAddress.getHostFromNameService(InetAddress.java:559)
    at java.net.InetAddress.getHostName(InetAddress.java:502)
    at java.net.InetAddress.getHostName(InetAddress.java:474)
    at com.gifisan.nio.component.AbstractEndPoint.getRemoteHost(AbstractEndPoint.java:69)
    at com.gifisan.nio.component.AbstractEndPoint.toString(AbstractEndPoint.java:90)
    at com.gifisan.nio.common.MessageFormatter.safeObjectAppend(MessageFormatter.java:138)
    at com.gifisan.nio.common.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:110)
    at com.gifisan.nio.common.MessageFormatter.arrayFormat(MessageFormatter.java:68)
    at com.gifisan.nio.common.MessageFormatter.format(MessageFormatter.java:16)
    at com.gifisan.nio.component.IOSession.toString(IOSession.java:245)
    at org.slf4j.helpers.MessageFormatter.safeObjectAppend(MessageFormatter.java:304)
    at org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:276)
    at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:230)
    at org.slf4j.helpers.MessageFormatter.format(MessageFormatter.java:124)
    at org.slf4j.impl.Log4jLoggerAdapter.debug(Log4jLoggerAdapter.java:228)
    at com.gifisan.nio.common.SLF4JLogger.debug(SLF4JLogger.java:45)
    at com.gifisan.nio.component.LoggerSEtListener.sessionOpened(LoggerSEtListener.java:11)
    at com.gifisan.nio.component.SessionEventListenerWrapper.sessionOpened(SessionEventListenerWrapper.java:22)
    at com.gifisan.nio.component.DefaultTCPEndPoint.<init>(DefaultTCPEndPoint.java:55)
    at com.gifisan.nio.connector.TCPSelectionConnector.attachEndPoint(TCPSelectionConnector.java:50)
    at com.gifisan.nio.connector.TCPSelectionConnector.finishConnect(TCPSelectionConnector.java:66)
    at com.gifisan.nio.connector.TCPSelectionConnector.accept(TCPSelectionConnector.java:40)
    at com.gifisan.nio.component.TCPSelectorLoop.accept(TCPSelectorLoop.java:40)
    at com.gifisan.nio.component.AbstractSelectorLoop.loop(AbstractSelectorLoop.java:45)
    at com.gifisan.nio.component.concurrent.UniqueThread.loop(UniqueThread.java:44)
    at com.gifisan.nio.component.concurrent.UniqueThread$1.run(UniqueThread.java:30)
    at java.lang.Thread.run(Thread.java:662)

   Locked ownable synchronizers:
    - None

网上找了下有人说是jdk的bug，不过这为直接crashes了，

http://bugs.java.com/bugdatabase/view_bug.do?bug_id=6487744

ITEYE：

http://jiajianchao-gmail-com.iteye.com/blog/1597253

 

 文章来源：http://www.cnblogs.com/gifisan/p/5695013.html