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https://issues.apache.org/jira/browse/CASSANDRA-14599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16561012#comment-16561012
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Jay Zhuang commented on CASSANDRA-14599:
----------------------------------------

Seems like it's caused by CASSANDRA-12133:
{quote}[~snazy]:
 Mike, you can safely ignore this message (see OHC issue).
 It's fixed in OHC 0.4.4 (not sure why I forgot to submit a patch for that 
until now)..

Using this ticket to upgrade OHC - but not in 3.0.x as it's just an "annoying" 
message.
{quote}
 I actually think we should upgrade OHC for 3.0 branch too (from {{0.4.3}} to 
{{0.4.4}}). As a user, we also monitor the {{ERROR/WARN}} in our production 
environment. The {{WARN}} message is harmless but misleading.

> [dtest] test_functional - global_row_key_cache_test.TestGlobalRowKeyCache
> -------------------------------------------------------------------------
>
>                 Key: CASSANDRA-14599
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14599
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Testing
>            Reporter: Jason Brown
>            Assignee: Marcus Eriksson
>            Priority: Major
>              Labels: dtest
>
> dtest fails all the time on 3.0, but not other branches. Error from pytest 
> output:
> {code}
> test teardown failure
> Unexpected error found in node logs (see stdout for full details). Errors: 
> [WARN  [main] 2018-07-23 18:53:10,075 Uns.java:169 - Failed to load Java8 
> implementation ohc-core-j8 : java.lang.NoSuchMethodException: 
> org.caffinitas.ohc.linked.UnsExt8.<init>(java.lang.Class), WARN  [main] 
> 2018-07-23 18:53:56,966 Uns.java:169 - Failed to load Java8 implementation 
> ohc-core-j8 : java.lang.NoSuchMethodException: 
> org.caffinitas.ohc.linked.UnsExt8.<init>(java.lang.Class), WARN  [main] 
> 2018-07-23 18:55:54,508 Uns.java:169 - Failed to load Java8 implementation 
> ohc-core-j8 : java.lang.NoSuchMethodException: 
> org.caffinitas.ohc.linked.UnsExt8.<init>(java.lang.Class), WARN  [main] 
> 2018-07-23 18:56:42,688 Uns.java:169 - Failed to load Java8 implementation 
> ohc-core-j8 : java.lang.NoSuchMethodException: 
> org.caffinitas.ohc.linked.UnsExt8.<init>(java.lang.Class), WARN  [main] 
> 2018-07-23 18:53:10,075 Uns.java:169 - Failed to load Java8 implementation 
> ohc-core-j8 : java.lang.NoSuchMethodException: 
> org.caffinitas.ohc.linked.UnsExt8.<init>(java.lang.Class)]
> {code}



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