Github user aarondav commented on a diff in the pull request:
https://github.com/apache/spark/pull/3142#discussion_r19965022
--- Diff:
network/shuffle/src/main/java/org/apache/spark/network/sasl/SaslMessage.java ---
@@ -58,7 +58,8 @@ public void encode(ByteBuf buf) {
public static SaslMessage decode(ByteBuf buf) {
if (buf.readByte() != TAG_BYTE) {
- throw new IllegalStateException("Expected SaslMessage, received
something else");
+ throw new IllegalStateException("Expected SaslMessage, received
something else"
+ + " (maybe your client does not have SASL enabled?)");
--- End diff --
Improved error message requested by @andrewor14
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