pyexpat.cpython-36m-x86_64-linux-gnu.so: undefined symbol: XML_SetHashSalt

Symptom:

Command line "aws cli" failed with error /usr/lib64/python3.6/lib-dynload/pyexpat.cpython-36m-x86_64-linux-gnu.so: undefined symbol: XML_SetHashSalt.

-bash-4.2$ aws s3 ls
Traceback (most recent call last):
  File "/usr/local/bin/aws", line 27, in <module>
    sys.exit(main())
  File "/usr/local/bin/aws", line 23, in main
    return awscli.clidriver.main()
  File "/usr/local/lib/python3.6/site-packages/awscli/clidriver.py", line 69, in main
    driver = create_clidriver()
  File "/usr/local/lib/python3.6/site-packages/awscli/clidriver.py", line 79, in create_clidriver
    event_hooks=session.get_component('event_emitter'))
  File "/usr/local/lib/python3.6/site-packages/awscli/plugin.py", line 44, in load_plugins
    modules = _import_plugins(plugin_mapping)
  File "/usr/local/lib/python3.6/site-packages/awscli/plugin.py", line 61, in _import_plugins
    module = __import__(path, fromlist=[module])
  File "/usr/local/lib/python3.6/site-packages/awscli/handlers.py", line 43, in <module>
    from awscli.customizations.history import register_history_mode
  File "/usr/local/lib/python3.6/site-packages/awscli/customizations/history/__init__.py", line 28, in <module>
    from awscli.customizations.history.show import ShowCommand
  File "/usr/local/lib/python3.6/site-packages/awscli/customizations/history/show.py", line 16, in <module>
    import xml.parsers.expat
  File "/usr/lib64/python3.6/xml/parsers/expat.py", line 4, in <module>
    from pyexpat import *
ImportError: /usr/lib64/python3.6/lib-dynload/pyexpat.cpython-36m-x86_64-linux-gnu.so: undefined symbol: XML_SetHashSalt

Troubleshooting:

Check the dependencies for pyexpat.cpython-36m-x86_64-linux-gnu.so:

-bash-4.2$ ldd /usr/lib64/python3.6/lib-dynload/pyexpat.cpython-36m-x86_64-linux-gnu.so
        linux-vdso.so.1 =>  (0x00007fffa67fc000)
        libexpat.so.1 => /lib64/libexpat.so.1 (0x00007f16058bb000)
        libpython3.6m.so.1.0 => /lib64/libpython3.6m.so.1.0 (0x00007f1605394000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f1605178000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f1604daa000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f1604ba6000)
        libutil.so.1 => /lib64/libutil.so.1 (0x00007f16049a3000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f16046a1000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f1605cf4000)

Check the suspicious file, found multiple of it in the LD_LIBRARY_PATH:

$ find / -name libexpat.so.1 2>/dev/null
/usr/lib64/libexpat.so.1
/rdsdbbin/oracle.12.1.custom.r1.EE.1/lib/libexpat.so.1

Solution:

Add /usr/lib64/ to the beginning of LD_LIBRARY_PATH:

export LD_LIBRARY_PATH=/usr/lib64/:$LD_LIBRARY_PATH