difin commented on code in PR #6540:
URL: https://github.com/apache/hive/pull/6540#discussion_r3455009139


##########
bin/ext/beeline.sh:
##########
@@ -32,11 +32,35 @@ beeline () {
   export HADOOP_CLIENT_OPTS="$HADOOP_CLIENT_OPTS 
-Dlog4j.configurationFile=beeline-log4j2.properties --add-opens 
java.base/java.nio=ALL-UNNAMED --add-opens java.base/java.net=ALL-UNNAMED 
--add-opens java.base/java.lang=ALL-UNNAMED  --add-opens 
java.base/java.util=ALL-UNNAMED --add-opens 
java.base/java.util.concurrent=ALL-UNNAMED --add-opens 
java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens 
java.base/java.util.regex=ALL-UNNAMED --add-opens 
java.base/java.lang.reflect=ALL-UNNAMED --add-opens 
java.base/java.io=ALL-UNNAMED "
 
   if [ "$EXECUTE_WITH_JAVA" != "true" ] ; then
+    if [ "$BEELINE_USE_HADOOP_JAR" == "true" ] ; then
+      if [ -z $CLIUSER ] ; then
+        exec $HADOOP jar ${beelineJarPath} $CLASS $HIVE_OPTS "$@"
+      else
+        exec $HADOOP jar ${beelineJarPath} $CLASS $HIVE_OPTS "$@" -n 
"${CLIUSER}" -p "${CLIUSER}"
+      fi
+    fi
+    beelineClasspath="${HADOOP_CLASSPATH}"
+    for x in $(${HADOOP} classpath --glob 2>/dev/null | tr ':' '\n') ; do
+      case "$x" in
+        *slf4j-reload4j*|*slf4j-log4j12*|*log4j-1.2*|*reload4j*) continue ;;
+      esac
+      beelineClasspath="${beelineClasspath}:${x}"

Review Comment:
   `beelineClasspath` is seeded from `HADOOP_CLASSPATH`, but `hadoop classpath 
--glob` already includes those paths, so appending all glob entries duplicates 
them. It would be good to add a guard before the append to skip entries already 
in `beelineClasspath`:
   
   ```
       if [[ ":${beelineClasspath}:" == *":${x}:"* ]] ; then
           continue
         fi
   ```
   
   above this line:
   `beelineClasspath="${beelineClasspath}:${x}"`
   



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