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https://issues.apache.org/jira/browse/HADOOP-18820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17749243#comment-17749243
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ASF GitHub Bot commented on HADOOP-18820:
-----------------------------------------
steveloughran commented on code in PR #5872:
URL: https://github.com/apache/hadoop/pull/5872#discussion_r1279495750
##########
hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/s3_select.md:
##########
@@ -663,6 +679,24 @@ to the `get()` call: do it.
## Troubleshooting
+### `NoClassDefFoundError: software/amazon/eventstream/MessageDecoder`
+
+Select operation failing with a missing evenstream class.
+
+```
+java.io.IOException: java.lang.NoClassDefFoundError:
software/amazon/eventstream/MessageDecoder
Review Comment:
scoped to test; added a JIRA about whether to cut entirely. If people want
it now, they need a new jar
> AWS SDK v2: make the v1 bridging support optional
> -------------------------------------------------
>
> Key: HADOOP-18820
> URL: https://issues.apache.org/jira/browse/HADOOP-18820
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.4.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
>
> The AWS SDK v2 code includes the v1 sdk core for plugin support of
> * existing credential providers
> * delegation token binding
> I propose we break #2 and rely on those who have implemented to to upgrade.
> apart from all the needless changes the v2 SDK did to the api (why?) this is
> fairly straighforward
> for #1: fix through reflection, retaining a v1 sdk dependency at test time so
> we can verify that the binder works.
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