beeline background broke the terminal

Hello,

I am currently working on a tool which allows to:

• Take a csv file which contains a table list
• Make a loop which will run through the list of tables and send it to beeline to retrieve the ddl of the tables which will be sent to a file

in my example there are 8 tables and I would like to send 5 beeline requests in the background. As soon as one of the tasks ends, the 6th request is sent to beeline etc etc. As soon as a new request ends, it sends a new request in the background.

There must always be 5 requests at the same time.
When I send the requests, I program well but the terminal bug at the end of the program. I write for example ls, nothing is displayed, i press enter, the command executes and print output.

Do you have an idea?

The code

#!/bin/bash

func_try(){
beelineUsername="xxx"
beelinePassword="xxx"
jdcb_url='xxx'
extra_param='hive.support.concurrency=true;hive.txn.manager=org.apache.hadoop.hive.ql.lockmgr.DbTxnManager;hive.compactor.initiator.on=true;hive.compactor.worker.threads=1;'
request="SHOW CREATE TABLE base.${$1}"
ref_pid=$BASHPID
change=$2

ddl=$( beeline -n "$beelineUsername" -p "$beelinePassword" --fastConnect=true -u "$jdcb_url$extra_param" --silent=true --outputformat="csv2" -f "./resultats/$change.hql" 2>&1)
ddlTable=$(echo "$ddl" > "./pid/${change}_${ref_pid}_ref.txt")
rm "${folder}/${changer}.hql"
}

ARG_PAR=5
folder="./resultats"

rm -f ."/resultats/*.hql"

count=1

while read -r Table;
do

1. Get Table to send in beeline
   if [ ! -z "$Table" ]
   then
   nb_file=$(ls ${folder} | wc -l)
2. This loop is bloking when $ARG_PAR=5 and wait one of beeline request end
3. for lauch the next request
   while [ $nb_file -eq ${ARG_PAR} ]
   do
   nb_file=$(ls ${folder} | wc -l)
   sleep 5
   done

1. Create token. This token contain the request to send in beeline
   echo "SHOW CREATE TABLE braff00.$Table" > "${folder}/${count}.hql"
   func_try "${Table}" "${count}" &
   fi
   let "count+=1"
   done < "./table.txt"