Github user arina-ielchiieva commented on a diff in the pull request:
https://github.com/apache/drill/pull/445#discussion_r58358260
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/service/ServiceEngine.java
---
@@ -177,6 +182,18 @@ public void run() {
});
}
+ /** If we are in distributed mode, disallow using loopback address to
register new drillbit
+ * unless zookeeper is on the same node with drillbit. */
+ private void checkLoopbackAddress(String address) throws
DrillbitStartupException, UnknownHostException {
+ if (isDistributedMode) {
+ String coordAddress =
StringUtils.substringBefore(config.getString(ExecConstants.ZK_CONNECTION), ":");
+ if (!InetAddress.getByName(coordAddress).isLoopbackAddress()
--- End diff --
At some point, we wanted to allow loopback only if we have one node only
but it's much safer to disallow loopback in distributed mode at all. Updated
pull request.
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