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https://issues.apache.org/jira/browse/HADOOP-13044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15255089#comment-15255089
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Kai Sasaki commented on HADOOP-13044:
-------------------------------------
Yes, as you said. 10.10.6 depends on
[httpclient:4.3.6|https://github.com/aws/aws-sdk-java/blob/cb4fa451e98099dfeac6f804eb72e215c04bd240/aws-java-sdk-core/pom.xml#L24-L28],
but 4.2.5 is actually used since it is specified by Hadoop POM. This can cause
anyway same issue though it's not surfaced yet.
> Amazon S3 library 10.10.60+ (JDK8u60+) depends on http components 4.3
> ---------------------------------------------------------------------
>
> Key: HADOOP-13044
> URL: https://issues.apache.org/jira/browse/HADOOP-13044
> Project: Hadoop Common
> Issue Type: Improvement
> Components: build, fs/s3
> Affects Versions: 2.8.0
> Environment: JDK 8u60
> Reporter: Kai Sasaki
> Assignee: Kai Sasaki
> Attachments: HADOOP-13044.01.patch
>
>
> In case of using AWS SDK in the classpath of hadoop, we faced an issue caused
> by incompatiblity of AWS SDK and httpcomponents.
> {code}
> java.lang.NoSuchFieldError: INSTANCE
> at
> com.amazonaws.http.conn.SdkConnectionKeepAliveStrategy.getKeepAliveDuration(SdkConnectionKeepAliveStrategy.java:48)
> at
> org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:535)
> at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
> at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
> {code}
> The latest AWS SDK depends on 4.3.x which has
> [DefaultConnectionKeepAliveStrategy.INSTANCE|http://hc.apache.org/httpcomponents-client-4.3.x/httpclient/apidocs/org/apache/http/impl/client/DefaultConnectionKeepAliveStrategy.html#INSTANCE].
> This field is introduced from 4.3.
> This will allow us to avoid {{CLASSPATH}} confliction around httpclient
> versions.
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