Date: Thu, 17 Jan 2002 00:12:50 -0800 (PST) From: huang wen hui <huanghwh@yahoo.com> To: freebsd-java@freebsd.org Subject: ServerSocket.accept() Message-ID: <20020117081250.6963.qmail@web20409.mail.yahoo.com>
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hi,
I wrote an app using ServerSocket, here is some
code:
try {
port = Integer.parseInt
(LissServerProperties.getProperty("System.control.port","5000"));
}
catch(java.lang.NumberFormatException nfEx) {
port = SERVER_PORT;
}
ServerSocket serverSocket = new ServerSocket
(port);
serverSocket.setSoTimeout( 30 * 1000);
System.err.println(new Date() +": Start NetSeis/IP
Service, ready to accept Client.");
Socket clientSocket = null;
while (!bQuit) {
try {
clientSocket = serverSocket.accept ();
ServerPI pi = new ServerPI (clientSocket);
/** @todo QQQQQbug:
* java.lang.OutOfMemoryError: unable to
create new native thread
* at java.lang.Thread.start(Native Method)
* at
cn.gd.seismology.liss.server.Server.start(Server.java:206)
* at
cn.gd.seismology.liss.server.Server.main(Server.java:285)
*/
new Thread (groupPI, pi, "ClientPI-" +
pi.getRemoteHostName() + ":" +
pi.getRemoteHostPort() ).start ();
/**
* we should not have many client establish at
some time.
*/
try{
Thread.sleep(2000);
}
catch(InterruptedException iEx) {}
}
catch(java.io.InterruptedIOException iioEx) {
//give a chance to handle bQuit
continue;
}
catch(java.net.SocketException sEx) { //handle
sun solaris "Interrupted System Calls" Exception.
System.err.println(new Date()+":\tSUN(?)\t"+
sEx.getMessage());
try{
Thread.sleep(10* 1000);
}
catch(InterruptedException iEx) {}
continue;
}
catch(java.lang.OutOfMemoryError oom) {//handle
bug
System.err.println("WARNING: \t" +
oom.getMessage());
String sms = oom.getMessage()+"\r\n" + "shoud
be OK, this is OS problem, especialy LINUX";
Result res = Result.buildResult (true,
Result.PRIORITY_ERR, Result.TYPE_SMS,networkID,
networkID+"IP", 0x0, new Date(),
sms.getBytes() );
MsgManager.addResult(res);
clientSocket.close();
System.gc();
}
}
serverSocket.close();
System.err.println(new Date() + "\t: Stop
NetSeis/IP to accept more client login.");
//System.exit(0);
After serverSocket accept client, clientSocket will
send Welcome msg to
client. under Solaris 8 , linux+sunJDK1.3.1 and
windows, my app works fine. I "telnet localhost 5000",
telnet client will receive welcome msg.
I run my app under FreeBSD4.4+JDK1.3.1p5. After some
clients connect the
server and run a certan times, I can not connect
server any more:
%telnet localhost 5000
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
telnet hang. It looks like serverSocket accept telnet,
but not return
clientSocket. Here is my netstat report:
%netstat -na | grep -v 3306 |grep tcp
tcp4 0 0 192.168.168.10.2136
192.168.169.10.4908 SYN_SENT
tcp4 0 0 192.168.168.10.2134
192.168.168.10.2135 TIME_WAIT
tcp4 0 0 *.2134 *.*
LISTEN
tcp4 0 0 *.2133 *.*
LISTEN
tcp4 0 0 192.168.168.10.2132
192.168.168.10.2131 TIME_WAIT
tcp4 0 0 192.168.168.10.2130
192.168.168.28.1813 TIME_WAIT
tcp4 0 0 192.168.168.10.2129
192.168.168.28.1809 TIME_WAIT
tcp4 0 0 192.168.168.10.2128
192.168.168.28.1804 TIME_WAIT
tcp4 0 0 192.168.168.10.2127
192.168.168.28.1794 TIME_WAIT
tcp4 0 0 192.168.168.10.2126
192.168.168.28.1789 TIME_WAIT
tcp4 0 0 192.168.168.10.2125
192.168.168.28.1784 TIME_WAIT
tcp4 0 0 192.168.168.10.2124
192.168.168.28.1779 TIME_WAIT
tcp4 0 0 192.168.168.10.2123
192.168.170.10.4780 TIME_WAIT
tcp4 0 0 192.168.168.10.2122
192.168.170.10.4775 TIME_WAIT
tcp4 0 0 192.168.168.10.2121
192.168.170.10.4770 TIME_WAIT
tcp4 0 0 192.168.168.10.2120
192.168.170.10.4765 TIME_WAIT
tcp4 0 0 192.168.168.10.2118
192.168.168.10.2119 TIME_WAIT
tcp4 0 0 *.2118 *.*
LISTEN
tcp4 0 0 *.2117 *.*
LISTEN
tcp4 0 0 192.168.168.10.2114
192.168.168.10.2115 TIME_WAIT
tcp4 0 0 192.168.168.10.2110
192.168.168.10.2111 TIME_WAIT
tcp4 0 0 *.2110 *.*
LISTEN
tcp4 0 0 *.2109 *.*
LISTEN
tcp4 0 0 192.168.168.10.2108
192.168.168.10.2107 TIME_WAIT
tcp4 0 0 192.168.168.10.2105
192.168.168.10.2106 TIME_WAIT
tcp4 0 0 192.168.168.10.2103
192.168.168.10.2102 TIME_WAIT
tcp4 0 0 192.168.168.10.2100
192.168.168.10.2101 TIME_WAIT
tcp4 0 0 192.168.168.10.2098
192.168.168.10.2099 TIME_WAIT
tcp4 0 0 192.168.168.10.2095
192.168.168.10.2092 TIME_WAIT
tcp4 0 0 192.168.168.10.2094
192.168.168.10.2093 TIME_WAIT
tcp4 0 0 192.168.168.10.2090
192.168.168.10.2091 TIME_WAIT
tcp4 0 0 192.168.168.10.2088
192.168.168.10.2089 TIME_WAIT
tcp4 0 0 192.168.168.10.2086
192.168.168.10.2085 TIME_WAIT
tcp4 0 0 192.168.168.10.2083
192.168.168.10.2082 TIME_WAIT
tcp4 0 0 192.168.168.10.2080
192.168.168.10.2081 TIME_WAIT
tcp4 0 0 192.168.168.10.2078
192.168.168.10.2077 TIME_WAIT
tcp4 0 0 192.168.168.10.2075
192.168.168.10.2076 TIME_WAIT
tcp4 0 0 192.168.168.10.2073
192.168.168.10.2072 TIME_WAIT
tcp4 0 0 192.168.168.10.2070
192.168.168.10.2071 TIME_WAIT
tcp4 0 0 192.168.168.10.2068
192.168.168.10.2067 TIME_WAIT
tcp4 0 0 192.168.168.10.2065
192.168.168.10.2066 TIME_WAIT
tcp4 0 0 192.168.168.10.2063
192.168.168.10.2062 TIME_WAIT
tcp4 0 0 127.0.0.1.5000
127.0.0.1.1736 CLOSE_WAIT
tcp4 0 0 127.0.0.1.1736
127.0.0.1.5000 FIN_WAIT_2
tcp4 0 20 192.168.168.10.22
192.168.168.5.1211 ESTABLISHED
tcp4 0 0 127.0.0.1.5000
127.0.0.1.1902 ESTABLISHED
tcp4 0 0 127.0.0.1.1902
127.0.0.1.5000 ESTABLISHED
tcp4 0 0 192.168.168.10.5000
192.168.168.10.1891 CLOSE_WAIT
tcp4 0 0 192.168.168.10.5000
192.168.168.27.2254 CLOSE_WAIT
tcp4 0 0 192.168.168.10.3382
192.168.170.10.2436 ESTABLISHED
tcp4 0 0 192.168.168.10.3381
192.168.170.10.2433 ESTABLISHED
tcp4 0 0 192.168.168.10.5000
192.168.170.10.2432 ESTABLISHED
tcp4 0 0 192.168.168.10.5000
192.168.170.10.2430 ESTABLISHED
tcp4 0 512 192.168.168.10.3084
192.168.169.10.1405 ESTABLISHED
tcp4 0 0 192.168.168.10.3083
192.168.169.10.1402 ESTABLISHED
tcp4 0 0 192.168.168.10.5000
192.168.169.10.1401 ESTABLISHED
tcp4 0 0 192.168.168.10.5000
192.168.169.10.1399 ESTABLISHED
tcp4 0 0 192.168.168.10.2982
192.168.168.28.3506 ESTABLISHED
tcp4 0 0 192.168.168.10.2981
192.168.168.28.3505 ESTABLISHED
tcp4 0 0 *.2981 *.*
LISTEN
tcp4 0 0 192.168.168.10.2975
192.168.168.28.5000 ESTABLISHED
tcp4 0 0 192.168.168.10.5000
192.168.168.10.2974 ESTABLISHED
tcp4 0 0 192.168.168.10.2974
192.168.168.10.5000 ESTABLISHED
tcp4 0 0 192.168.168.10.2973
192.168.168.28.5000 ESTABLISHED
tcp4 0 0 192.168.168.10.2915
192.168.168.28.3437 ESTABLISHED
tcp4 0 0 192.168.168.10.2914
192.168.168.28.3435 ESTABLISHED
tcp4 0 0 192.168.168.10.5000
192.168.168.28.3434 ESTABLISHED
tcp4 0 0 192.168.168.10.5000
192.168.168.28.3432 ESTABLISHED
tcp4 0 14336 127.0.0.1.4921
127.0.0.1.4922 ESTABLISHED
tcp4 57344 0 127.0.0.1.4922
127.0.0.1.4921 ESTABLISHED
tcp4 0 0 127.0.0.1.5000
127.0.0.1.4920 ESTABLISHED
tcp4 0 0 127.0.0.1.4920
127.0.0.1.5000 ESTABLISHED
tcp4 0 0 192.168.168.10.2344
192.168.169.10.3974 ESTABLISHED
tcp4 0 0 192.168.168.10.2340
192.168.169.10.3973 ESTABLISHED
tcp4 0 0 *.2340 *.*
LISTEN
tcp4 0 0 192.168.168.10.2338
192.168.169.10.5000 ESTABLISHED
tcp4 0 24 192.168.168.10.5000
192.168.168.10.2337 ESTABLISHED
tcp4 0 0 192.168.168.10.2337
192.168.168.10.5000 ESTABLISHED
tcp4 0 0 192.168.168.10.2331
192.168.169.10.5000 ESTABLISHED
tcp4 0 0 192.168.168.10.1056
192.168.170.10.1177 ESTABLISHED
tcp4 0 0 192.168.168.10.1055
192.168.170.10.1176 ESTABLISHED
tcp4 0 0 *.1055 *.*
LISTEN
tcp4 0 0 192.168.168.10.1045
192.168.170.10.5000 ESTABLISHED
tcp4 0 0 192.168.168.10.5000
192.168.168.10.1044 ESTABLISHED
tcp4 0 0 192.168.168.10.1044
192.168.168.10.5000 ESTABLISHED
tcp4 0 0 192.168.168.10.1043
192.168.170.10.5000 ESTABLISHED
tcp4 0 0 127.0.0.1.8005 *.*
LISTEN
tcp4 0 0 *.5000 *.*
LISTEN
tcp4 0 0 *.6000 *.*
LISTEN
tcp4 0 0 *.139 *.*
LISTEN
tcp4 0 0 *.80 *.*
LISTEN
tcp4 0 0 *.8008 *.*
LISTEN
tcp4 0 0 *.8080 *.*
LISTEN
tcp4 0 0 *.22 *.*
LISTEN
tcp46 0 0 *.22 *.*
LISTEN
tcp4 0 0 *.515 *.*
LISTEN
tcp6 0 0 *.515 *.*
LISTEN
I've fight with this problem for a long time. Does
jdk1.3.1p5 have bug or my
app have something wrong ?
--hwh
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