Jose Luis López created HADOOP-19970:
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Summary: 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: Task
Components: build, common, test
Reporter: Jose Luis López
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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