[GitHub] [hadoop] vinayakumarb commented on a change in pull request #2342: HADOOP-17288. Use shaded guava from thirdparty.

[GitBox <gi...@apache.org>]

vinayakumarb commented on a change in pull request #2342:
URL: https://github.com/apache/hadoop/pull/2342#discussion_r500116361



##########
File path: hadoop-common-project/hadoop-auth/pom.xml
##########
@@ -234,6 +235,24 @@
           <excludeFilterFile>${basedir}/dev-support/findbugsExcludeFile.xml</excludeFilterFile>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>com.google.code.maven-replacer-plugin</groupId>
+        <artifactId>replacer</artifactId>
+        <executions>
+          <execution>
+            <id>replace-sources</id>
+            <configuration>
+              <skip>false</skip>
+            </configuration>
+          </execution>
+          <execution>
+            <id>replace-test-sources</id>
+            <configuration>
+              <skip>false</skip>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>

Review comment:
       Instead of replacing guava references along with protobuf references, create a separate replacer-execution in hadoop-project/pom.xml and enable by default for all projects.
   ```
               <execution>
                 <id>replace-guava</id>
                 <phase>process-sources</phase>
                 <goals>
                   <goal>replace</goal>
                 </goals>
                 <configuration>
                   <skip>false</skip><!--This will run for all modules-->
                   <basedir>${basedir}</basedir>
                   <includes>
                     <include>src/main/java/**/*.java</include>
                     <include>src/test/java/**/*.java</include>
                   </includes>
                   <replacements>
                     <replacement>
                       <token>([^\.])com.google.common</token>
                       <value>$1${hadoop-thirdparty-shaded-guava-prefix}</value>
                     </replacement>
                   </replacements>
                 </configuration>
               </execution>
   ```
   
   2. Exclude guava-replacement in hadoop-yarn-csi module. yarn-csi seems to have separate classpath, and it explicitly uses guava-20. This will not affect any downstreams.
   
   3. Replaces all dependencies on guava to hadoop-shaded-guava (except yarn-csi)
   
   4. In hadoop-common/pom.xml, Keep both guava (11.0.2) and hadoop-shaded-guava as dependencies. Of course code should use shaded version of guava. version 11.0.2 is used in curator libs during runtime. 




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