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An operation on a socket could not be performed because the system lac...
...能执行套接字上的操作。）
原因：建立大于5000的出口TCP连接端口导致，通常是过多的客户端连接导致的。
解决方案：配置服务器以增加最大TCP端口数，从该端口可以建立出口连接。
解决方案
默认的临时 TCP 端...
How to kill a process running on particular port in Linux?
...
This fuser 8080/tcp will print you PID of process bound on that port.
And this fuser -k 8080/tcp will kill that process.
Works on Linux only. More universal is use of lsof -i4 (or 6 for IPv6).
...
What is the difference between connection and read timeout for sockets?
...for sure happen that you wait very very long. We had a case here, where an HttpURLConnection.getResponseCode() was hanging for apprx. a week until we restarted the process. There was obviously no timeout set on the JVM side and as well no timeout on the Linux OS side.
– Tom Fin...
Is pass-by-value a reasonable default in C++11?
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How to find memory leak in a C++ code/project?
...he leak yet allowed - I'm usually seeking it with deleaker (check it here: http://deleaker.com).
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What is the overhead of creating a new HttpClient per call in a WebAPI client?
What should be the HttpClient lifetime of a WebAPI client?
Is it better to have one instance of the HttpClient for multiple calls?
...
How are multi-dimensional arrays formatted in memory?
...cess each element individually.
int a[2][2] ={{0,1},{2,3}};
void f1(int *ptr);
void f1(int *ptr)
{
int a=0;
int b=0;
a=ptr[0];
b=ptr[1];
printf("%d\n",a);
printf("%d\n",b);
}
int main()
{
f1(a[0]);
f1(a[1]);
return 0;
}
...
Remote debugging with Android emulator
...er Windows, what follows requires having Cygwin installed with the package httptunnel. This must work under Linux / httptunnel as well but I didn't try.
Run the emulator on one of the machines (let's say its host name is HostEmulator)
Start Eclipse on the other machine (let's call it HostEclipse)...
Why is TypedReference behind the scenes? It's so fast and safe… almost magical!
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Where are my postgres *.conf files?
...srvname = 'postgres' # (Kerberos only)
#krb_caseins_users = off
# - TCP Keepalives -
# see "man 7 tcp" for details
#tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds;
# 0 selects the system default
#tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds;
...