[ 
https://issues.apache.org/jira/browse/YARN-9898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17102750#comment-17102750
 ] 

Ayush Saxena commented on YARN-9898:
------------------------------------

Thanx [~seanlau] for the patch.
I have re triggered the build here, I don't think the failure is related to the 
patch :
https://builds.apache.org/job/PreCommit-YARN-Build/26007/

Have verified the fix in AARCH-64 :

{noformat}
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.apache.hadoop.yarn.csi.client.TestCsiClient
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.835 s 
- in org.apache.hadoop.yarn.csi.client.TestCsiClient
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

{noformat}


{noformat}
[INFO] ------------------------------------------------------------------------
[INFO] Detecting the operating system and CPU architecture
[INFO] ------------------------------------------------------------------------
[INFO] os.detected.name: linux
[INFO] os.detected.arch: aarch_64
[INFO] os.detected.version: 4.15
[INFO] os.detected.version.major: 4
[INFO] os.detected.version.minor: 15
[INFO] os.detected.release: ubuntu
[INFO] os.detected.release.version: 16.04
[INFO] os.detected.release.like.ubuntu: true
[INFO] os.detected.release.like.debian: true
[INFO] os.detected.classifier: linux-aarch_64
[INFO] ------------------------------------------------------------------------

{noformat}

[~weichiu] Let me know for any concerns, will hold this up for you a couple of 
days to have a look.

> Dependency netty-all-4.1.27.Final doesn't support ARM platform
> --------------------------------------------------------------
>
>                 Key: YARN-9898
>                 URL: https://issues.apache.org/jira/browse/YARN-9898
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: liusheng
>            Assignee: liusheng
>            Priority: Major
>         Attachments: YARN-9898.001.patch, YARN-9898.002.patch
>
>
> Hadoop dependent the Netty package, but the *netty-all-4.1.27.Final* of 
> io.netty maven repo, cannot support ARM platform. 
> When run the test *TestCsiClient.testIdentityService* on ARM server, it will 
> raise error like following:
> {code:java}
> Caused by: java.io.FileNotFoundException: 
> META-INF/native/libnetty_transport_native_epoll_aarch_64.so
>         at 
> io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:161)
>         ... 45 more
>         Suppressed: java.lang.UnsatisfiedLinkError: no 
> netty_transport_native_epoll_aarch_64 in java.library.path
>                 at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867)
>                 at java.lang.Runtime.loadLibrary0(Runtime.java:870)
>                 at java.lang.System.loadLibrary(System.java:1122)
>                 at 
> io.netty.util.internal.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:38)
>                 at 
> io.netty.util.internal.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:243)
>                 at 
> io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:124)
>                 ... 45 more
>                 Suppressed: java.lang.UnsatisfiedLinkError: no 
> netty_transport_native_epoll_aarch_64 in java.library.path
>                         at 
> java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867)
>                         at java.lang.Runtime.loadLibrary0(Runtime.java:870)
>                         at java.lang.System.loadLibrary(System.java:1122)
>                         at 
> io.netty.util.internal.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:38)
>                         at 
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>                         at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>                         at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>                         at java.lang.reflect.Method.invoke(Method.java:498)
>                         at 
> io.netty.util.internal.NativeLibraryLoader$1.run(NativeLibraryLoader.java:263)
>                         at java.security.AccessController.doPrivileged(Native 
> Method)
>                         at 
> io.netty.util.internal.NativeLibraryLoader.loadLibraryByHelper(NativeLibraryLoader.java:255)
>                         at 
> io.netty.util.internal.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:233)
>                         ... 46 more
> {code}
>  



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