[英]java, my thread is terminated without any exception or throwable, why?
我有一個問題,我的線程被終止了,沒有任何異常!!!
我有一個接受套接字的線程(nio,但阻塞模式)。如果套接字以慢速接收請求,但當一次接收大量請求時,線程會停止。
我在linux中更改了幾個選項,可能是為了這個?
我的代碼的一部分:
while(!Thread.interrupted() && !serverSocketChannel.socket().isClosed()){
try
{
SocketChannel socketChannel = serverSocketChannel.accept();
while (!socketChannel.finishConnect() && check < 50) {
try {
Thread.sleep(20);
}
catch (InterruptedException ignored) {}
check += 1;
}
check = 0;
if(!socketChannel.finishConnect()){
socketChannel.close();
continue;
}
NioSocket socket = new NioSocket(server, socketChannel);
if(acceptedSocketQueue.offer(socket))
server.addSocket(socket);
else
socket.forceClose();
}
catch(Throwable e){
Logger.log(SocketAccepter.class, e,"SocketAccepter, on accepting.");
}
}
Logger.log(SocketAccepter.class,"SocketAccepter ### interrupted.");
// I do not get here
更改選項:
echo fs.file-max=500000 >> /etc/sysctl.conf
echo fs.nr_open=500000 >> /etc/sysctl.conf
echo fs.aio-max-nr=300000 >> /etc/sysctl.conf
echo fs.aio-nr=50000 >> /etc/sysctl.conf
echo net.ipv4.tcp_mem="2048 51200 725376" >> /etc/sysctl.conf
echo net.core.rmem_default=51200 >> /etc/sysctl.conf
echo net.core.rmem_max=725376 >> /etc/sysctl.conf
echo net.ipv4.tcp_rmem="2048 51200 725376" >> /etc/sysctl.conf
echo net.core.wmem_default=51200 >> /etc/sysctl.conf
echo net.core.wmem_max=725376 >> /etc/sysctl.conf
echo net.ipv4.tcp_wmem="2048 51200 725376" >> /etc/sysctl.conf
echo net.ipv4.tcp_syn_retries=4 >> /etc/sysctl.conf
echo net.ipv4.tcp_synack_retries=2 >> /etc/sysctl.conf
echo net.ipv4.ip_local_port_range=1024 65500 >> /etc/sysctl.conf
echo net.ipv4.tcp_fin_timeout=20 >> /etc/sysctl.conf
echo net.ipv4.tcp_keepalive_time=240 >> /etc/sysctl.conf
echo net.ipv4.tcp_keepalive_probes=3 >> /etc/sysctl.conf
echo net.ipv4.tcp_keepalive_intvl=30 >> /etc/sysctl.conf
echo net.core.somaxconn=5000 >> /etc/sysctl.conf
echo net.core.netdev_max_backlog=5000 >> /etc/sysctl.conf
echo net.ipv4.tcp_max_syn_backlog=5000 >> /etc/sysctl.conf
echo net.core.rps_sock_flow_entries=32000 >> /etc/sysctl.conf
echo net.core.optmem_max=51100 >> /etc/sysctl.conf
echo net.ipv4.tcp_rfc1337=1 >> /etc/sysctl.conf
echo net.ipv4.tcp_max_orphans=2000 >> /etc/sysctl.conf
echo net.ipv4.tcp_syncookies=0 >> /etc/sysctl.conf
echo net.ipv4.tcp_adv_win_scale=2 >> /etc/sysctl.conf
如果你知道,請幫助我。
更新:
我向線程添加了Thread.UncaughtExceptionHandler
。 然后我通過這個命令運行了應用程序
java - jar app.jar &>> log.txt
當線程停止時我打開了日志文件。
在日志文件中我看到下面的行
Exception: java.lang.NullPointerException thrown from the UncaughtExceptionHandler in thread "NioServer Accepter"
我的新代碼是這樣的
SocketChannel socketChannel = serverSocketChannel.accept();
NioSocket socket = new NioSocket(server, socketChannel);
acceptedSocketQueue.offer(socket);
我意識到serverSocketChannel.accept()
導致這種情況發生,有人有理由嗎?
我解決了我的問題。
經過一天的反復試驗,問題終於通過禁用linux中的幾個選項來解決。
我不知道這些選項究竟做了什么導致拋出異常? 有人知道嗎?
但是選項:
fs.file-max=500000
fs.nr_open=500000
fs.aio-max-nr=300000
fs.aio-nr=50000
我刪除了它們,程序運行正常。
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