src/java.base/unix/native/libnio/ch/Net.c

rev 57580 : [mq]: MulticastSocketAdaptor

*** 585,594 ****
--- 585,601 ----
          optval = (void*)&mreq_source;
          optlen = sizeof(mreq_source);
      }
  
      n = setsockopt(fdval(env,fdo), IPPROTO_IP, opt, optval, optlen);
+ #ifdef __APPLE__
+     // workaround macOS bug where IP_ADD_MEMBERSHIP fails intermittently
+     if (n < 0 && errno == ENOMEM) {
+         n = setsockopt(fdval(env,fdo), IPPROTO_IP, opt, optval, optlen);
+     }
+ #endif
+ 
      if (n < 0) {
          if (join && (errno == ENOPROTOOPT || errno == EOPNOTSUPP))
              return IOS_UNAVAILABLE;
          handleSocketError(env, errno);
      }
*** 655,664 ****
--- 662,678 ----
          optlen = sizeof(req);
  #endif
      }
  
      n = setsockopt(fdval(env,fdo), IPPROTO_IPV6, opt, optval, optlen);
+ #ifdef __APPLE__
+     // workaround macOS bug where IPV6_ADD_MEMBERSHIP fails intermittently
+     if (n < 0 && errno == ENOMEM) {
+         n = setsockopt(fdval(env,fdo), IPPROTO_IPV6, opt, optval, optlen);
+     }
+ #endif
+ 
      if (n < 0) {
          if (join && (errno == ENOPROTOOPT || errno == EOPNOTSUPP))
              return IOS_UNAVAILABLE;
          handleSocketError(env, errno);
      }