[已解决] java.net.InetAddress.getHostName() 阻塞问题

时间：2023-03-08 22:29:28
[已解决] java.net.InetAddress.getHostName() 阻塞问题

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

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