Hi @Dhwani_Dholakia ,
You are attempting to download all bacterial sequences in the nucleotide database... it is an extraordinarily large query, consisting of 71,204,621 entries... so it is not a surprise that the job gets killed.
Please also read carefully the help documentation (type qiime rescript get-ncbi-data --help
to view this), particularly this part:
Please be aware of the NCBI Disclaimer and Copyright notice
(https://www.ncbi.nlm.nih.gov/home/about/policies/), particularly "run
retrieval scripts on weekends or between 9 pm and 5 am Eastern Time
weekdays for any series of more than 100 requests". As a rough guide, if
you are downloading more than 125,000 sequences, only run this method at
those times.
If you are interested in bacterial 16S sequences specifically, see this tutorial:
Good luck!