10.1.2 Application Pack 8.1.2.0.0 FAQs

1. If the cx_Oracle connection is failing in DS with below error in OEL 8.

   Fail to execute line 4: cx_Oracle.connect(dsn=dsn_alias)\nTraceback (most recent call last):\n File "/tmp/1638454321889-0/zeppelin_python.py", line 163, in <module>\n exec(code, _zcUserQueryNameSpace)\n File "<stdin>", line 4, in <module>\ncx_Oracle.DatabaseError: DPI-1047: Cannot locate a 64-bit Oracle Client library: "libnsl.so.1: cannot open shared object file: No such file or directory". Install the libnsl package as below: yum install libnsl or sudo yum install libnsl

2. Incase of Python Interpreter fails With `py4j` Error

   When running interpreters locally, they assume all the dependencies to be already installed and available. Python Interpreter needs `py4j` Package, exact steps to install it depend on the Operating System. If you use `pip`, it can be done with ```bash pip install --user py4j ``` Install the package for all users, root user can run this command without `--user`.

3. What is the reason for the http error code 401 when I successfully log in to the MMG application while MMG Studio is down?

   If MMG Studio is not up during the MMG application login, the mmg-ui logs capture the http error code : 401 . Since the cookie creation is done during MMG application login, the user must re login to the MMG application once the Studio is up and running.

4. What should I do when the following error message is displayed, and the SSL module is unavailable for Linux 8?

   urllib3.exceptions.SSLError: Can’t connect to HTTPS URL because the SSL module is not available. During handling of the above expectation, another exception occurred:

   1. Install the compat-openssl10 module on Linux 8.
   2. Log in to the server as a root user where MMG Application is installed.
   3. Run the following Shell command: yum -y install compat-openssl10.