[AGENT++] SNMP++ Session Create Fail, SNMP++: Resource unavailable

[???]

Hi everybody!

Now I met a problem about snmp program development when using snmp++v3.2.15.

I use the SNMP Get operation to find the alive snmp agent devices.My program code framework is as follows:

 #define MAX_PTHREAD_NUM 254
 
 void* snmpPingPong(void* args)
 //args contains the possible IPv4 address
 {
	if the specified device which is identified by the args can be reachable by snmp,
    then add it to a global queue object(of cource using mutext when writing the specified IP address to queue).
   
 }

 void funcA(char* netaddress,char*netmask)
 {
   for(int i=0;i<MAX_PTHREAD_NUM;i++)
      pthread_create();
   for(int i=0;i<MAX_PTHREAD_NUM;i++)
      pthread_join();   
 }

 And now in main function,I execute funcA for several time,for examples,I gave the parameters <192.168.1.0 255.255.255.0>?

<192.168.2.0 255.255.255.0>?<192.168.3.0 255.255.255.0>?<192.168.4.0 255.255.255.0>?<192.168.5.0 255.255.255.0>?

<192.168.6.0 255.255.255.0> and even more.

During execution,it firstly shows snmpGet error(because of timeout and it is resulted by dead device,And it is right.No problem).

but later,if shows "SNMP++ Session Create Fail, SNMP++: Resource unavailable"


Any idea? 

Can you show me a hand?

Regards!

 hfwu at seu.edu.cn