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From "Valentin Kulichenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-7799) Dependency Conflict : Conlicting JARs org.apache.httpcomponents:httpclient
Date Fri, 23 Feb 2018 13:05:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-7799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16374311#comment-16374311
] 

Valentin Kulichenko commented on IGNITE-7799:
---------------------------------------------

I believe Maven will use the one provided explicitly in the POM in this case, not transitive
one. Did you actually expirience one of these issues?

> Dependency Conflict : Conlicting JARs org.apache.httpcomponents:httpclient
> --------------------------------------------------------------------------
>
>                 Key: IGNITE-7799
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7799
>             Project: Ignite
>          Issue Type: Bug
>          Components: aws
>    Affects Versions: 2.5
>            Reporter: PandaMonkey
>            Priority: Major
>             Fix For: 3.0
>
>
> Hi, by analyzing ignite-master\modules\aws\pom.xml, I found that there are two versions
of *org.apache.httpcomponents:httpclient*. Their introduced path is:
>  # org.apache.ignite:ignite-aws:2.5.0-SNAPSHOT::null->com.amazonaws:aws-java-sdk-core:1.11.75::compile->org.apache.httpcomponents:httpclient:4.5.2::compile
>  # org.apache.ignite:ignite-aws:2.5.0-SNAPSHOT::null->org.apache.httpcomponents:httpclient:4.5.1::compile
> Of them, httpclient:4.5.2 is the transitive dependency, and httpclient:4.5.1 is the
direct dependency. By further analyzing the source code, we found they have different features. As
the JVM only load the classes present first on the classpath and shadow the other duplicate
ones with the same names. The dependency conflict problem brings high risks of "*NotClassDefFoundError:*"
or "*NoSuchMethodError*" issues at runtime. Please notice this problem. *The solution is upgrading httpclient
from 4.5.1 to 4.5.2.*
>  
> ===============projectPath->org.apache.ignite:ignite-aws:2.5.0-SNAPSHOT@D:\ws\snapshot\ignite-master\modules\aws\pom.xml
>  =======conflict:<org.apache.httpcomponents:httpclient:4.5.2::compile><org.apache.httpcomponents:httpclient:4.5.1::compile>
size:2
>  org.apache.ignite:ignite-aws:2.5.0-SNAPSHOT::null->com.amazonaws:aws-java-sdk-core:1.11.75::compile->org.apache.httpcomponents:httpclient:4.5.2::compile
>  org.apache.ignite:ignite-aws:2.5.0-SNAPSHOT::null->org.apache.httpcomponents:httpclient:4.5.1::compile
> *====Risk for ClassNotFoundException/NotClassDefFoundError:*
>  a) Classes that only exist in org.apache.httpcomponents:httpclient:4.5.1:
>  org.apache.http.client.utils.DateUtils$DateFormatHolder$1
> b) Classes that only exist in org.apache.httpcomponents:httpclient:4.5.2:
>  org.apache.http.conn.ssl.DefaultHostnameVerifier$TYPE
>  org.apache.http.impl.client.DefaultClientConnectionReuseStrategy
>  org.apache.http.conn.ssl.DefaultHostnameVerifier$1
> *====Risk for NoSuchMethodException/NoSuchMethodError:*
>  Methods that only exist in org.apache.httpcomponents:httpclient:4.5.2:
>  <org.apache.http.impl.cookie.PublicSuffixDomainFilter: java.util.Map createLocalDomainMap()>
>  <org.apache.http.impl.cookie.IgnoreSpec: boolean match(org.apache.http.cookie.Cookie,org.apache.http.cookie.CookieOrigin)>
>  <org.apache.http.impl.client.HttpClientBuilder: org.apache.http.impl.client.HttpClientBuilder
setDnsResolver(org.apache.http.conn.DnsResolver)>
>  



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