HADOOP-13996. Fix some release build issues.

dev-support/bin/create-release

@@ -249,7 +249,7 @@ function startgpgagent
   if [[ "${SIGN}" = true ]]; then
     if [[ -n "${GPGAGENT}" && -z "${GPG_AGENT_INFO}" ]]; then
       echo "starting gpg agent"
-      echo "default-cache-ttl 7200" > "${LOGDIR}/gpgagent.conf"
+      echo "default-cache-ttl 14400" > "${LOGDIR}/gpgagent.conf"
       # shellcheck disable=2046
       eval $("${GPGAGENT}" --daemon \
         --options "${LOGDIR}/gpgagent.conf" \
@@ -506,6 +506,9 @@ function makearelease
 
   mkdir -p "${LOGDIR}"
 
+  # Install the Hadoop maven plugins first
+  run_and_redirect "${LOGDIR}/mvn_install_maven_plugins.log" "${MVN}" "${MVN_ARGS[@]}" -pl hadoop-maven-plugins -am clean install
+
   # mvn clean for sanity
   run_and_redirect "${LOGDIR}/mvn_clean.log" "${MVN}" "${MVN_ARGS[@]}" clean
 

hadoop-dist/pom.xml

@@ -129,6 +129,16 @@
           </execution>
         </executions>
       </plugin>
+      <!-- Disable the sign plugin, since there isn't anything to sign -->
+      <plugin>
+        <artifactId>maven-gpg-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>sign-artifacts</id>
+            <phase>never</phase>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
   </build>