From cefb46d0fcc08d3a1e2b8f4d42f0b9933bcbbef2 Mon Sep 17 00:00:00 2001
From: Jason Tedor <jason@tedor.me>
Date: Tue, 28 Nov 2017 11:29:47 -0500
Subject: [PATCH] Throw UOE from compressible bytes stream reset

A compressible bytes output stream is a stream output which supports a
reset method. However, compressible bytes output streams are unusual in
that the current implementation sometimes supports a reset (if the
stream is not compressed) and sometimes does not support a rest (if the
stream is compressed). This inconsistent behavior is puzzling and
instead we should simply always throw an unsupported operation
exception.

Relates #27564
---
 .../elasticsearch/transport/CompressibleBytesOutputStream.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/java/org/elasticsearch/transport/CompressibleBytesOutputStream.java b/core/src/main/java/org/elasticsearch/transport/CompressibleBytesOutputStream.java
index 7689806220a..4b4923ab1f8 100644
--- a/core/src/main/java/org/elasticsearch/transport/CompressibleBytesOutputStream.java
+++ b/core/src/main/java/org/elasticsearch/transport/CompressibleBytesOutputStream.java
@@ -104,6 +104,6 @@ final class CompressibleBytesOutputStream extends StreamOutput {
 
     @Override
     public void reset() throws IOException {
-        stream.reset();
+        throw new UnsupportedOperationException();
     }
 }