Centos7 node-oracle connection failed error - Error: DPI-1047 - oracle

Question

I'm trying to install my web application on Centos7.
I've tested on my Windows and everything worked fine.
I've followed oracle instruction. However, it's impossible to connect to DB.
There's an already running program in the machine so I do not believe oracle is not installed as the error says. Please check blow and help.
Added into .bashrc:
export LD_LIBRARY_PATH=/home/bcweb/oracleclient/instantclient_19_3
created oracleclient folder and added all the required file
2.
-r--r--r-- 1 bcweb oinstall 5780 4월 17 2019 BASIC_LICENSE
-rw-r--r-- 1 bcweb oinstall 1632 4월 17 2019 BASIC_README
-rw-r--r-- 1 bcweb oinstall 41840 4월 17 2019 adrci
-rw-r--r-- 1 bcweb oinstall 59296 4월 17 2019 genezi
lrwxrwxrwx 1 bcweb oinstall 17 3월 29 08:18 libcintsh.so -> libclntsh.so.19.3
-rw-r--r-- 1 bcweb oinstall 17 4월 17 2019 libclntsh.so
-rw-r--r-- 1 bcweb oinstall 17 4월 17 2019 libclntsh.so.10.1
-rw-r--r-- 1 bcweb oinstall 17 4월 17 2019 libclntsh.so.11.1
-rw-r--r-- 1 bcweb oinstall 17 4월 17 2019 libclntsh.so.12.1
-rw-r--r-- 1 bcweb oinstall 17 4월 17 2019 libclntsh.so.18.1
-rw-r--r-- 1 bcweb oinstall 79961792 4월 17 2019 libclntsh.so.19.1
-rw-r--r-- 1 bcweb oinstall 8041608 4월 17 2019 libclntshcore.so.19.1
-r--r--r-- 1 bcweb oinstall 3609536 4월 17 2019 libipc1.so
-r--r--r-- 1 bcweb oinstall 478432 4월 17 2019 libmql1.so
-rw-r--r-- 1 bcweb oinstall 6587832 4월 17 2019 libnnz19.so
-rw-r--r-- 1 bcweb oinstall 15 4월 17 2019 libocci.so
-rw-r--r-- 1 bcweb oinstall 15 4월 17 2019 libocci.so.10.1
-rw-r--r-- 1 bcweb oinstall 15 4월 17 2019 libocci.so.11.1
-rw-r--r-- 1 bcweb oinstall 15 4월 17 2019 libocci.so.12.1
-rw-r--r-- 1 bcweb oinstall 15 4월 17 2019 libocci.so.18.1
-rw-r--r-- 1 bcweb oinstall 2339896 4월 17 2019 libocci.so.19.1
-rw-r--r-- 1 bcweb oinstall 130515320 4월 17 2019 libociei.so
-r--r--r-- 1 bcweb oinstall 153624 4월 17 2019 libocijdbc19.so
-rw-r--r-- 1 bcweb oinstall 115976 4월 17 2019 liboramysql19.so
drwxr-xr-x 3 bcweb oinstall 19 8월 27 2020 network
-rw-r--r-- 1 bcweb oinstall 4210517 4월 17 2019 ojdbc8.jar
-rw-r--r-- 1 bcweb oinstall 1680074 4월 17 2019 ucp.jar
-rw-r--r-- 1 bcweb oinstall 236960 4월 17 2019 uidrvci
-rw-r--r-- 1 bcweb oinstall 74263 4월 17 2019 xstreams.jar
error:
Error: DPI-1047: Cannot locate a 64-bit Oracle Client library: "libclntsh.so: cannot open shared object file: No such file or directory". See https://oracle.github.io/node-oracledb/INSTALL.html for help
Node-oracledb installation instructions: https://oracle.github.io/node-oracledb/INSTALL.html
You must have 64-bit Oracle client libraries in LD_LIBRARY_PATH, or configured with ldconfig.
If you do not have Oracle Database on this computer, then install the Instant Client Basic or Basic Light package from
http://www.oracle.com/technetwork/topics/linuxx86-64soft-092277.html
at OracleDb.getConnection (/home/bcweb/web/backend/node_modules/oracledb/lib/oracledb.js:272:25)
at OracleDb.getConnection (/home/bcweb/web/backend/node_modules/oracledb/lib/util.js:176:19)

Answer 1

Adding LD_LIBRARY_PATH to your Bash configuration files is a potential failure point - there are many places where this wouldn't have an effect. It's better to use ldconfig as shown in the node-oracledb installation instructions with Instant Client ZIP files. However, if you have other Oracle software (such as the database itself) on your computer, then you wouldn't do this. Update your question with more details if this is the case, and you want help.
Finally, Instant Client 19.10 is out, so there's no reason to still be using 19.3.