8010371: getaddrinfo can fail with EAI_SYSTEM/EAGAIN, causes UnknownHostException to be thrown

Summary: Modify UHE exception message for EAI_AGAIN failures.
Reviewed-by: alanb, chegar, michaelm, dsamersoff
Contributed-by: NBrian Burkhalter <brian.burkhalter@oracle.com>

src/solaris/native/java/net/Inet4AddressImpl.c

@@ -178,8 +178,7 @@ Java_java_net_Inet4AddressImpl_lookupAllHostAddr(JNIEnv *env, jobject this,
 
     if (error) {
         /* report error */
-        JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException",
-                        (char *)hostname);
+        ThrowUnknownHostExceptionWithGaiError(env, hostname, error);
         JNU_ReleaseStringPlatformChars(env, host, hostname);
         return NULL;
     } else {

src/windows/native/java/net/Inet4AddressImpl.c

@@ -241,6 +241,10 @@ Java_java_net_Inet4AddressImpl_lookupAllHostAddr(JNIEnv *env, jobject this,
           addrp++;
           i++;
         }
+    } else if (WSAGetLastError() == WSATRY_AGAIN) {
+        NET_ThrowByNameWithLastError(env,
+                                     JNU_JAVANETPKG "UnknownHostException",
+                                     hostname);
     } else {
         JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException", hostname);
     }

src/windows/native/java/net/Inet6AddressImpl.c

@@ -131,7 +131,13 @@ Java_java_net_Inet6AddressImpl_lookupAllHostAddr(JNIEnv *env, jobject this,
 
     error = getaddrinfo(hostname, NULL, &hints, &res);
 
-    if (error) {
+    if (WSAGetLastError() == WSATRY_AGAIN) {
+        NET_ThrowByNameWithLastError(env,
+                                     JNU_JAVANETPKG "UnknownHostException",
+                                     hostname);
+        JNU_ReleaseStringPlatformChars(env, host, hostname);
+        return NULL;
+    } else if (error) {
         /* report error */
         JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException",
                         (char *)hostname);