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https://issues.apache.org/jira/browse/ARROW-1864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16276421#comment-16276421
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ASF GitHub Bot commented on ARROW-1864:
---------------------------------------

zsxwing commented on a change in pull request #1376: ARROW-1864: [Java] Upgrade 
Netty to 4.1.17
URL: https://github.com/apache/arrow/pull/1376#discussion_r154578316
 
 

 ##########
 File path: java/memory/src/main/java/io/netty/buffer/ArrowBuf.java
 ##########
 @@ -493,6 +494,16 @@ public ArrowBuf retain() {
     return retain(1);
   }
 
+  @Override
+  public ByteBuf touch() {
+    return this;
 
 Review comment:
   The `touch` method is added for 
`AdvancedLeakAwareByteBuf/AdvancedLeakAwareCompositeByteBuf`. Other ByteBufs 
just need to delegate it or implement it as an empty method.

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> [Java] Upgrade Netty to 4.1.x
> -----------------------------
>
>                 Key: ARROW-1864
>                 URL: https://issues.apache.org/jira/browse/ARROW-1864
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Java - Memory
>            Reporter: Shixiong Zhu
>            Assignee: Shixiong Zhu
>              Labels: pull-request-available
>             Fix For: 0.8.0
>
>
> The Netty community will declare Netty 4.0.x as EOL at the beginning of the 
> second quarter of 2018: https://github.com/netty/netty/issues/7439
> It would be great that Arrow can migrate to Netty 4.1.x soon. This is the 
> only blocker for Spark to migrate to Netty 4.1.x.



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