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https://issues.apache.org/jira/browse/HADOOP-19970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18107632#comment-18107632
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ASF GitHub Bot commented on HADOOP-19970:
-----------------------------------------
joseluisll commented on PR #8699:
URL: https://github.com/apache/hadoop/pull/8699#issuecomment-5403263251
With the three substasks HADOOP-19970, HADOOP-19971 and HADOOP-19972, we
have migrated to jetty12-ee8 as an intermediate step, not breaking downstream
consumers. I'm still testing those. The breaking changes should be delivered in
a future and additional release, giving time anf instructions for consumers to
adapt to the namespace change, that is, using the jakarta instead of the javax
classes.
This changes also introduce jdk-17 as a requirement, they are no longer
jdk-8 compatible due to jetty12.
> Resolve a single Jetty release and servlet API on every module classpath
> ------------------------------------------------------------------------
>
> Key: HADOOP-19970
> URL: https://issues.apache.org/jira/browse/HADOOP-19970
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: build, common, test
> Reporter: Jose Luis López
> Priority: Major
> Labels: pull-request-available
>
> Several modules resolve more than one Jetty release, and more than one servlet
> API, on a single classpath. Both combinations compile and then fail at run
> time,
> on whichever code path reaches the wrong jar.
> Intended result:
> * Every module resolves one Jetty release. Three are in play today: 9.4.44
> and
> 9.4.55 reach some classpaths beside the managed 9.4.58.
> * Every module resolves one servlet API. javax.servlet:javax.servlet-api and
> jakarta.servlet:jakarta.servlet-api both publish the javax.servlet
> packages,
> and 73 modules carry both, so which one a module compiles and runs against
> is
> decided by the order of the jars rather than by anything in a pom.
> * Every module that uses Jetty in its main sources declares it. Four do not,
> and compile only because some other dependency happens to supply it.
> * The unused JSP API is gone. It reaches around eighty-five classpaths
> through
> hadoop-common, and nothing in the tree uses JSP.
> One module keeps two servlet APIs:
> hadoop-yarn-server-timelineservice-hbase-tests,
> where the second arrives with HBase's own test stack.
> None of this depends on a Jetty version change.
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