switch (errno) { 
case ECONNRESET: 
case EPIPE: 
  JNU_ThrowByName(env, "sun/net/ConnectionResetException",   
  "Connection reset"); 
  break; 
         .... 

if (errno == ECONNRESET) { 
          JNU_ThrowByName(env, "sun/net/ConnectionResetException", 
            "Connection reset"); 
    } else { 
      NET_ThrowByNameWithLastError(env, "java/net/SocketException",  
      "Write failed"); 
    } 

set_signal_handler(SIGSEGV, true); 
set_signal_handler(SIGPIPE, true); 
set_signal_handler(SIGBUS, true); 
set_signal_handler(SIGILL, true); 
set_signal_handler(SIGFPE, true); 
set_signal_handler(SIGXFSZ, true); 

sigAct.sa_handler = SIG_DFL; 
 if (!set_installed) { 
  sigAct.sa_flags = SA_SIGINFO|SA_RESTART; 
 } else { 
  sigAct.sa_sigaction = signalHandler; 
  sigAct.sa_flags = SA_SIGINFO|SA_RESTART; 
 } 

extern "C" int 
JVM_handle_linux_signal(int sig, 
            siginfo_t* info, 
            void* ucVoid, 
            int abort_if_unrecognized) { 
 ucontext_t* uc = (ucontext_t*) ucVoid; 
 
 Thread* t = ThreadLocalStorage::get_thread_slow(); 
 
 SignalHandlerMark shm(t); 
 
 // Note: it's not uncommon that JNI code uses signal/sigset to install 
 // then restore certain signal handler (e.g. to temporarily block SIGPIPE, 
 // or have a SIGILL handler when detecting CPU type). When that happens, 
 // JVM_handle_linux_signal() might be invoked with junk info/ucVoid. To 
 // avoid unnecessary crash when libjsig is not preloaded, try handle signals 
 // that do not require siginfo/ucontext first. 
 
 if (sig == SIGPIPE || sig == SIGXFSZ) { 
  // allow chained handler to go first 
  if (os::Linux::chained_handler(sig, info, ucVoid)) { 
   return true; 
  } else { 
   if (PrintMiscellaneous && (WizardMode || Verbose)) { 
    char buf[64]; 
    warning("Ignoring %s - see bugs 4229104 or 646499219", 
        os::exception_name(sig, buf, sizeof(buf))); 
   } 
   return true; 
  } 
 } 
... 
} 

if (errno == ECONNRESET) { 
          JNU_ThrowByName(env, "sun/net/ConnectionResetException", 
            "Connection reset"); 
    } else { 
      NET_ThrowByNameWithLastError(env, "java/net/SocketException",  
      "Write failed"); 
    } 

void 
NET_ThrowByNameWithLastError(JNIEnv *env, const char *name, 
          const char *defaultDetail) { 
  char errmsg[255]; 
  sprintf(errmsg, "errno: %d, error: %s\n", errno, defaultDetail);  
  JNU_ThrowByNameWithLastError(env, name, errmsg);  
} 

JNIEXPORT void JNICALL 
JNU_ThrowByNameWithLastError(JNIEnv *env, const char *name, 
         const char *defaultDetail) 
{ 
  char buf[256]; 
  int n = JVM_GetLastErrorString(buf, sizeof(buf)); 
 
  if (n > 0) { 
  jstring s = JNU_NewStringPlatform(env, buf); 
  if (s != NULL) { 
    jobject x = JNU_NewObjectByName(env, name, 
            "(Ljava/lang/String;)V", s); 
    if (x != NULL) { 
    (*env)->Throw(env, x); 
    } 
  } 
  } 
  if (!(*env)->ExceptionOccurred(env)) { 
  JNU_ThrowByName(env, name, defaultDetail); 
  } 
} 

int 
sysGetLastErrorString(char *buf, int len) 
{ 
  if (errno == 0) { 
  return 0; 
  } else { 
  const char *s = strerror(errno); 
  int n = strlen(s); 
  if (n >= len) n = len - 1; 
  strncpy(buf, s, n); 
  buf[n] = '\0'; 
  return n; 
  } 
}