HADOOP-17042. Hadoop distcp throws 'ERROR: Tools helper ///usr/lib/hadoop/libexec/tools/hadoop-distcp.sh was not found'. Contributed by Aki Tanaka.

(cherry picked from commit 27601fc79ed053ce978ac18a2c5706d32e58019f)

hadoop-common-project/hadoop-common/src/main/bin/hadoop-functions.sh

@@ -1337,7 +1337,7 @@ function hadoop_add_to_classpath_tools
     # shellcheck disable=SC1090
     . "${HADOOP_LIBEXEC_DIR}/tools/${module}.sh"
   else
-    hadoop_error "ERROR: Tools helper ${HADOOP_LIBEXEC_DIR}/tools/${module}.sh was not found."
+    hadoop_debug "Tools helper ${HADOOP_LIBEXEC_DIR}/tools/${module}.sh was not found."
   fi
 
   if declare -f hadoop_classpath_tools_${module} >/dev/null 2>&1; then